SFFS247 February 2022 LM25143
4 Pin Failure Mode Analysis (Pin FMA)
This section provides a Failure Mode Analysis (FMA) for the pins of the LM25143. The failure modes covered in this document include the typical pin-by-pin failure scenarios:
- Pin short-circuited to Ground (see Table 4-2)
- Pin open-circuited (see Table 4-3)
- Pin short-circuited to an adjacent pin (see Table 4-4)
- Pin short-circuit to VIN (see Table 4-5)
Table 4-2 through Table 4-5 also indicate how these pin conditions can affect the device as per the failure effects classification in Table 4-1.
Table 4-1 TI Classification of Failure
Effects
| Class | Failure Effects |
|---|---|
| A | Potential device damage that affects functionality |
| B | No device damage, but loss of functionality |
| C | No device damage, but performance degradation |
| D | No device damage, no impact to functionality or performance |
Figure 4-1 shows the LM25143 pin diagram. For a detailed description of the device pins please refer to the Pin Configuration and Functions section in the LM25143 data sheet.
Figure 4-1 Pin DiagramFollowing are the assumptions of use and the device configuration assumed for the pin FMA in this section:
- Application Circuit as per LM25143 data sheet is used
- PG1 and PG2 are pulled-up to VOUT1 and VOUT2
Table 4-2 Pin FMA for Device Pins
Short-Circuited to Ground
| Pin Name | Pin No. | Description of Potential Failure Effect(s) | Failure Effect Class |
|---|---|---|---|
| SS2 | 1 | VOUT1 = regulation, VOUT2 = 0 V | B |
| COMP2 | 2 | VOUT1 = regulation, VOUT2 = 0 V | B |
| FB2 | 3 | If FB = VDDA, then VOUT1 and VOUT2 = 0 V. | B |
| If FB = GND, then VOUT1 = regulation and VOUT2 = 5 V. | B | ||
| CS2 | 4 | VOUT1 = regulation, VOUT2 = oscillation | C |
| VOUT2 | 5 | VOUT1 = regulation, VOUT2 = 0 V, excessive current from VIN, and enters overcurrent protection | B |
| VCCX | 6 | If VCCX = GND, then VOUT1 and VOUT2 = regulation. | D |
| If VCCX is connected to VOUT2, then VOUT1 = regulation, VOUT2 = 0 V, and the internal VCC regulator is used. | B | ||
| If VCCX is connected to an external supply, then VOUT1 and VOUT2 = regulation. | B | ||
| PG2 | 7 | VOUT1 and VOUT2 = regulation, and PG2 is forced low. | B |
| HOL2 | 8 | VOUT1 and VOUT2 = 0 V. VCC will be discharged through HB2. | B |
| HO2 | 9 | VOUT1 and VOUT2 = 0 V. VCC will be discharged through HB2. | B |
| SW2 | 10 | VOUT1 = regulation, VOUT2 = 0 V, and excessive current from VIN | A |
| HB2 | 11 | VOUT1 and VOUT2 = 0 V. VCC regulator is loaded to current limit. | B |
| LOL2 | 12 | VOUT1 and VOUT2 = regulation | D |
| LO2 | 13 | VOUT1 and VOUT2 = regulation | C |
| PGND2 | 14 | VOUT1 and VOUT2 = regulation | D |
| VCC | 15 | VOUT1 and VOUT2 = 0 V | B |
| VCC | 16 | VOUT1 and VOUT2 = 0 V | B |
| PGND1 | 17 | VOUT1 and VOUT2 = regulation | D |
| LO1 | 18 | VOUT1 and VOUT2 = regulation | C |
| LOL1 | 19 | VOUT1 and VOUT2 = regulation | C |
| HB1 | 20 | VOUT1 and VOUT2 = 0 V. VCC regulator is loaded to current limit. | B |
| SW1 | 21 | VOUT1 = regulation, VOUT2 = 0 V, and excessive current from VIN | B |
| HO1 | 22 | VOUT1 and VOUT2 = 0 V | B |
| HOL1 | 23 | VOUT1 and VOUT2 = 0 V | B |
| PG1 | 24 | VOUT1 and VOUT2 = regulation, and PG1 is forced low. | C |
| VIN | 25 | VOUT1 and VOUT2 = 0 V | A |
| VOUT1 | 26 | VOUT1 = 0 V, VOUT2 = regulation, and excessive current from VIN | B |
| CS1 | 27 | VOUT1 = oscillation, VOUT2 = regulation | C |
| FB1 | 28 | If FB1 = VDDA, then VOUT1 and VOUT2 = 0 V. | B |
| If FB1 = GND, then VOUT1 = 5 V expected and VOUT2 = regulation. | B | ||
| COMP1 | 29 | VOUT1 = 0 V, VOUT2 = regulation | B |
| SS1 | 30 | VOUT1 = 0 V, VOUT2 = regulation | B |
| EN1 | 31 | VOUT1 = 0 V, VOUT2 = regulation | B |
| RES | 32 | VOUT1 and VOUT2 = regulation, cannot exit hiccup mode | B |
| DEMB | 33 | If DEMB = VDDA, then VOUT1 and VOUT2 = 0 V. | B |
| VOUT1 and VOUT2 = regulation | C | ||
| MODE | 34 | If MODE = VDDA, then VOUT1 and VOUT2 = 0 V. | B |
| If MODE = GND, then VOUT1 and VOUT2 = regulation. | D | ||
| AGND | 35 | VOUT1 and VOUT2 = regulation | D |
| VDDA | 36 | VOUT1 and VOUT2 = 0 V, no switching | B |
| RT | 37 | VOUT1 and VOUT2 = regulation, operating at the maximum switching frequency | C |
| DITH | 38 | VOUT1 and VOUT2 = regulation | C |
| SYNCOUT | 39 | VOUT1 and VOUT2 = regulation | D |
| EN2 | 40 | VOUT1 = 0 V, VOUT2 = regulation | B |
Table 4-3 Pin FMA for Device Pins
Open-Circuited
| Pin Name | Pin No. | Description of Potential Failure Effect(s) | Failure Effect Class |
|---|---|---|---|
| SS2 | 1 | VOUT1 and VOUT2 = regulation | D |
| COMP2 | 2 | VOUT1 = regulation, VOUT2 = oscillation, and will not regulate | C |
| FB2 | 3 | VOUT2 = regulation, VOUT2 = will not regulate. The controller will be configured for adjustable output. | B |
| CS2 | 4 | VOUT1 = regulation, VOUT2 oscillation, and no overcurrent detection | A |
| VOUT2 | 5 | VOUT1 = regulation, VOUT2 = oscillation, and will not regulate | A |
| VCCX | 6 | VOUT1 and VOUT2 = regulation | D |
| PG2 | 7 | VOUT1 and VOUT2 = regulation, no PG2 information | C |
| HOL2 | 8 | VOUT1 = regulation, VOUT2 = VIN, will not regulate, and excessive current from VIN | D |
| HO2 | 9 | VOUT1 = regulation, VOUT2 = 0 V, and will not regulate | B |
| SW2 | 10 | VOUT1 = regulation, VOUT2 = VIN, and high-side FET control floating | A |
| HB2 | 11 | VOUT1 = regulation, VOUT2 = 0 V, and high-side gate drive floating | B |
| LOL2 | 12 | VOUT1 = regulation, VOUT2 = 0 V, no gate discharge path for low-side MOSFET | B |
| LO2 | 13 | VOUT1 and VOUT2 = regulation, lower efficiency | C |
| PGND2 | 14 | VOUT1 and VOUT2 = 0 V, uncontrolled behavior because of the floating ground | B |
| VCC | 15 | VOUT1 and VOUT2 = 0 V | B |
| VCC | 16 | VOUT1 and VOUT2 = 0 V | B |
| PGND1 | 17 | VOUT1 and VOUT2 = 0 V, uncontrolled behavior because of the floating ground | B |
| LO1 | 18 | VOUT1 = regulation, lower efficiency, and VOUT2 = regulation | C |
| LOL1 | 19 | VOUT1 = 0 V, no discharge path for low-side MOSFET, and VOUT2 = regulation | B |
| HB1 | 20 | VOUT1 = regulation, VOUT2 = 0 V, and high-side gate drive floating | B |
| SW1 | 21 | VOUT1 = no regulation, high-side FET control floating, and VOUT2 = regulation | A |
| HO1 | 22 | VOUT1 = will not regulate, VOUT2 = regulation | B |
| HOL1 | 23 | VOUT1 = VIN, will not regulate, excessive current from VIN, and VOUT2 = regulation | C |
| PG1 | 24 | VOUT1 = regulation, VOUT2 = regulation, and no PG1 information | C |
| VIN | 25 | VOUT1 and VOUT2 = 0 V | B |
| VOUT1 | 26 | VOUT1 = oscillation, will not regulate, and VOUT2 = regulation | A |
| CS1 | 27 | VOUT1 = oscillation, no overcurrent detection, and VOUT2 = regulation | A |
| FB1 | 28 | VOUT2 = will not regulate, the controller will be configured for adjustable output, and VOUT2 = regulation. | B |
| COMP1 | 29 | VOUT1 = oscillation and will not regulate, VOUT2 = regulation | B |
| SS1 | 30 | VOUT1 and VOUT2 = regulation | D |
| EN1 | 31 | VOUT1 and VOUT2 = 0 V | B |
| RES | 32 | VOUT1 and VOUT2 = regulation, exit hiccup mode current limit quickly | C |
| DEMB | 33 | VOUT1 and VOUT2 = regulation, erratic switching | C |
| MODE | 34 | VOUT1 = regulation, VOUT2 = 0 V, and error amplifier CH2 is set to zero. | B |
| AGND | 35 | VOUT1 and VOUT2 = 0 V | B |
| VDDA | 36 | VOUT1 and VOUT2 = 0 V, noisy bias rail | B |
| RT | 37 | VOUT1 and VOUT2 = 0 V | B |
| DITH | 38 | VOUT1 and VOUT2 = regulation, no spread spectrum | C |
| SYNCOUT | 39 | VOUT1 and VOUT2 = 0 V, cannot be synchronized to another part | C |
| EN2 | 40 | VOUT1 and VOUT2 = 0 V | B |
Table 4-4 Pin FMA for Device Pins
Short-Circuited to Adjacent Pin
| Pin Name | Pin No. | Shorted to | Description of Potential Failure Effect(s) | Failure Effect Class |
|---|---|---|---|---|
| SS1 | 1 | COMP2 | VOUT1 = regulation, VOUT2 = VIN | B |
| COMP2 | 2 | FB2 | If FB2 = VDDA, then VOUT1 = regulation and VOUT2 = VIN. | A |
| If FB2 = GND, then VOUT1 regulation and VOUT2 = 0 V. | B | |||
| FB2 | 3 | CS2 | If FB2 = VDDA, then VOUT1 = regulation and VOUT2 = 3.3 V. | B |
| If FB2 = GND, then VOUT1 = regulation and VOUT = 0 V. | B | |||
| CS2 | 4 | VOUT2 | VOUT1 = regulation, VOUT2 = oscillation | B |
| VOUT2 | 5 | VCCX | If VOUT2 < 6.5 V, then VOUT1 and VOUT2 = regulation, | B |
| If VOUT2 > 6.5 V, then the device damage exceeds the absolute maximum raring. | A | |||
| VCCX | 6 | PG2 | VOUT1 and VOUT2 = regulation, PG2 corrupted | B |
| PG2 | 7 | HOL2 | VOUT1 and VOUT2 = regulation, PG2 corrupted | B |
| If HOL2 > 6.5 V and exceeds the maximum rating, PG2 is damaged | A | |||
| HOL2 | 8 | HO2 | VOUT1 and VOUT2 = regulation | D |
| HO2 | 9 | SW2 | VOUT1 = regulation, VOUT2 < 3 V | B |
| SW2 | 10 | HB2 | VOUT1 = regulation, VOUT2 = 0 V | B |
| HB2 | 11 | LOL2 | VOUT1 and VOUT2 = 0 V | B |
| LOL2 | 12 | LO2 | VOUT1 and VOUT2 = regulation | B |
| LO2 | 13 | PGND2 | VOUT1 and VOUT2 = regulation | B |
| PGND2 | 14 | VCC | VOUT1 and VOUT2 = 0 V | A |
| VCC | 15 | VCC | VOUT1 and VOUT2 = regulation | D |
| VCC | 16 | PGND1 | VOUT1 and VOUT2 = 0 V | A |
| PGND1 | 17 | LO1 | VOUT1 and VOUT2 = regulation | C |
| LO1 | 18 | LOL1 | VOUT1 and VOUT2 = regulation | D |
| LOL1 | 19 | HB1 | VOUT1 = 0 V, VOUT2 = regulation | B |
| HB1 | 20 | SW1 | VOUT1 = 0 V, VOUT2 = regulation | B |
| SW1 | 21 | HO1 | VOUT1 = 0 V, VOUT2 = regulation | B |
| HO1 | 22 | HOL1 | VOUT1 and VOUT2 = regulation | D |
| HOL1 | 23 | PG1 | VOUT1 and VOUT2 = regulation, PG1 corrupted | D |
| If HOL1 > 6.5 V and exceeds the maximum ratings, PG1 can be damaged. | A | |||
| PG1 | 24 | VIN | If VIN < 6.5 V, then VOUT1 and VOUT2 = regulation. If VIN > 6.5 V and exceeds the maximum rating of PG1, the device is damaged. | A |
| If VIN > 6.5 V and exceeds the maximum rating of PG1, the device is damaged. | A | |||
| VIN | 25 | VOUT1 | VOUT1 = VIN no switching, VOUT2 = regulation | B |
| VOUT1 | 26 | CS1 | VOUT1 = oscillation, VOUT2 = regulation | B |
| CS1 | 27 | FB1 | If FB1 = VDDA, then VOUT1 = 3.3 V and VOUT2 = regulation. | B |
| If FB1 = GND, then VOUT1 = 0 V and VOUT2 = regulation. | B | |||
| FB1 | 28 | COMP1 | If FB1 = VDDA, then VOUT1 = VIN, excessive current from VIN, and VOUT2 = regulation. | A |
| If FB1 = GND, then VOUT1 = 0 V and VOUT2 = regulation. | B | |||
| COMP1 | 29 | SS1 | VOUT1 = VIN, VOUT2 = regulation | B |
| SS1 | 30 | EN1 | If EN < 6.5 V, then VOUT1 and VOUT2 = regulation. | D |
| If EN1 > 6.5 V, this exceeds the maximum ratings of SS1 pin and the device will be damaged. | A | |||
| EN1 | 31 | RES | If EN < 6.5 V, then VOUT1 and VOUT2 = regulation. | D |
| If EN1 > 6.5 V, this exceeds the maximum ratings of RES pin and the device will be damaged. | A | |||
| RES | 32 | DEMB | VOUT1 and VOUT2 = regulation | B |
| DEMB | 33 | MODE | If DEMB = MODE = GND, then configured as independent dual-output, VOUT1 and VOUT2 = regulation. | B |
| If DEMB = MODE = VDDA, then configured as single-output interleaved VOUT1 and VOUT2 = 0 V. | B | |||
| MODE | 34 | AGND | If MODE = GND, then VOUT1 and VOUT2 = regulation and is always in independent dual-output operation. | D |
| AGND | 35 | VDDA | VOUT1 and VOUT2 = 0 V | B |
| VDDA | 36 | RT | VOUT1 and VOUT2 = 0 V, no switching | B |
| RT | 37 | DITH | VOUT1 = VOUT2 = oscillation | B |
| DITH | 38 | SYNCOUT | VOUT1 and VOUT2 = regulation, no spread spectrum | C |
| SYNCOUT | 39 | EN2 | VOUT1 = regulation, VOUT2 = 0 V | B |
| EN2 | 40 | SS2 | If EN < 6.5 V, then VOUT1 and VOUT2 = regulation. | D |
| If EN1 > 6.5 V, this exceeds the maximum ratings of SS1 pin and the device will be damaged. | A |
Table 4-5 Pin FMA for Device Pins
Short-Circuited to
VIN
| Pin Name | Pin No. | Description of Potential Failure Effect(s) | Failure Effect Class |
|---|---|---|---|
| SS1 | 1 | If VIN < 6.5 V, then VOUT1 and VOUT2 = regulation. | D |
| If VIN > 6.5 V, then exceeds the SS1 maximum rating and the SS1 pin is damaged. | A | ||
| COMP2 | 2 | If VIN > 5 V and < 6.5 V, then VOUT1 and VOUT2 = 0 V. | B |
| If VIN > 6.5 V, then exceeds the COMP2 maximum rating and the COMP2 pin is damaged. | A | ||
| FB2 | 3 | If VIN < 6.5 V and FB2 = VDDA, then VOUT1 = regulation and VOUT2 = 3.3 V. | B |
| If VIN < 6.5 V and FB2 = GND, then VOUT1 and VOUT2 = 0 V and there is excessive current from VIN. | B | ||
| If VIN > 6.5 V and exceeds the maximum ratings of the FB2 pin voltage, then the FB2 pin is damaged. | A | ||
| CS2 | 4 | If VIN < 60 V, then VOUT1 = regulation and VOUT2 = VIN. | B |
| If VIN > 60 V and exceeds the maximum ratings of the CS2 pin, then the CS2 pin is damaged. | A | ||
| VOUT2 | 5 | If VIN < 60 V, then VOUT1 = regulation and VOUT2 = VIN. | B |
| If VIN > 60 V and exceeds the maximum ratings of the VOUT2 pin, then the VOUT2 pin is damaged. | A | ||
| VCCX | 6 | If VIN < 6.5 V, if VCCX = VOUT2, then VOUT1 = regulation and VOUT2 = VIN. | B |
| If VIN > 6.5 V and exceeds the maximum ratings of the VCCX pin, then the VCCX pin is damaged. | A | ||
| PG2 | 7 | If VIN < 6.5 V, then VOUT1 and VOUT2 = regulation and PG2 forced is high. | D |
| If VIN > 6.5 V and exceeds the maximum ratings of the PG2 pin, the PG2 pin is damaged. | A | ||
| HOL2 | 8 | If VIN < 6.5 V, then VOUT1 = regulation, VOUT2 = VIN – dropout, and there is no switching. | B |
| If VIN > 6.5 V and exceeds the maximum ratings of the HOL2 pin, then the HOL2 pin is damaged. | A | ||
| HO2 | 9 | If VIN < 6.5 V, then VOUT1 = regulation, VOUT2 = VIN – dropout, and there is no switching. | B |
| If VIN > 6.5 V and exceeds the maximum ratings of the HO2 pin, then the HO2 pin is damaged. | A | ||
| SW2 | 10 | VOUT1 = regulation, VOUT2 = VIN, and excessive current from VIN | B |
| HB2 | 11 | If VIN < 6.5 V, then VOUT1 and VOUT2 = regulation and erratic switching on CH2. | B |
| If VIN > 6.5 V and exceeds the maximum ratings of the HB2 pin, then the HB2 pin is damaged. | A | ||
| LOL2 | 12 | If VIN < 6.5 V, then VOUT1 and VOUT2 = 0 V and excessive current from VIN. | B |
| If VIN > 6.5 V and exceeds the maximum ratings of the LOL2 pin, then the LOL2 pin is damaged. | A | ||
| LO2 | 13 | If VIN < 6.5 V, then VOUT1 and VOUT2 = 0 V and excessive current from VIN. | B |
| If VIN > 6.5 V and exceeds the maximum ratings of the LO2 pin, then the LO2 pin is damaged. | A | ||
| PGND2 | 14 | VOUT and VOUT2 = 0 V, excessive current from VIN | B |
| VCC | 15 | If VIN < 6.5 V, then VOUT1 and VOUT2 = regulation. | D |
| If VIN > 6.5 V and exceeds the maximum ratings of the VCC pin, then the VCC pin is damaged. | A | ||
| VCC | 16 | If VIN < 6.5 V, then VOUT1 and VOUT2 = regulation. | D |
| If VIN > 6.5 V and exceeds the maximum ratings of the VCC pin, then the VCC pin is damaged. | A | ||
| PGND1 | 17 | VOUT1 and VOUT2 = 0 V, excessive current from VIN | B |
| LO1 | 18 | If VIN < 6.5 V, then VOUT1 and VOUT2 = 0 V, and excessive current from VIN. | B |
| If VIN > 6.5 V and exceeds the maximum ratings of the LO1 pin, then the LO1 pin is damaged. | A | ||
| LOL1 | 19 | If VIN < 6.5 V, then VOUT1 and VOUT2 = 0 V and excessive current from VIN. | B |
| If VIN > 6.5 V and exceeds the maximum ratings of the LOL1 pin, then the LOL1 pin is damaged. | A | ||
| HB1 | 20 | If VIN < 6.5 V, then VOUT1 and VOUT2 = regulation. | C |
| If VIN > 6.5 V and exceeds the maximum ratings of the HB1 pin, then the HB1 pin is damaged. | A | ||
| SW1 | 21 | VOUT1 = VIN, VOUT2 = regulation, and excessive current from VIN | B |
| HO1 | 22 | If VIN < 6.5 V, then VOUT1 = VIN – dropout, VOUT2 = regulation, and no switching. | B |
| If VIN > 6.5 V and exceeds the maximum ratings of the HB1 pin, then the HO1 pin is damaged. | A | ||
| HOL1 | 23 | If VIN < 6.5 V, then VOUT1 = VIN – dropout, VOUT2 = regulation, and no switching. | B |
| If VIN > 6.5 V and exceeds the maximum ratings of the HB1 pin, then the HOL1 pin is damaged. | A | ||
| PG1 | 24 | If VIN < 6.5 V, VOUT1 and VOUT2 = regulation and PG1 is forced high. | D |
| If VIN > 6.5 V and exceeds the maximum ratings of the PG1 pin, then PG1 pin is damaged. | A | ||
| VIN | 25 | VOUT1 and VOUT2 = regulation | D |
| VOUT1 | 26 | If VIN < 60 V, then VOUT1 = VIN and VOUT2 = regulation. | B |
| If VIN > 60 V and exceeds the maximum ratings of the VOUT1 pin, then the VOUT1 pin is damaged. | A | ||
| CS1 | 27 | If VIN < 60 V, then VOUT1 = VIN and VOUT2 = regulation. | B |
| If VIN > 60 V and exceeds the maximum ratings of the CS1 pin, then the CS1 pin is damaged. | A | ||
| FB1 | 28 | If VIN < 6.5 V and FB1= VDDA, then VOUT1 = 3.3 V and VOUT2 = regulation. | B |
| If VIN < 6.5 V and FB1 = GND, then VOUT1 and VOUT2 = 0 V and excessive current from VIN. | B | ||
| If VIN > 6.5 V and exceeds the maximum ratings of the FB1 pin voltage, the FB1 pin is damaged. | A | ||
| COMP1 | 29 | If VIN > 5 V and < 6.5 V, then VOUT1 and VOUT2 = 0 V. | B |
| If VIN > 6.5 V and exceeds the COMP1 maximum rating, then COMP1 pin is damaged. | A | ||
| SS1 | 30 | If VIN < 6.5 V, then VOUT1 and VOUT2 = regulation. | D |
| If VIN > 6.5 V and exceeds the SS1 maximum rating, then SS1 pin is damaged. | A | ||
| EN1 | 31 | VOUT1 and VOUT2 regulation | D |
| RES | 32 | If VIN < 6.5 V, then VOUT1 = regulation, VOUT2 = regulation, and no hiccup mode. | C |
| If VIN > 6.5 V and exceeds the RES maximum rating, then the RES pin is damaged. | A | ||
| DEMB | 33 | If VIN < 6.5 V, then VOUT1 and VOUT2 = regulation. | B |
| If VIN > 6.5 V and exceeds the DEMB maximum rating, then the DEMB pin is damaged. | A | ||
| MODE | 34 | If MODE = GND, then VOUT1 and VOUT2 = 0 V. | B |
| If MODE = VDDA = and VIN < 6.5 V, then VOUT1 and VOUT2 = regulation. | B | ||
| If VIN > 6.5 V and exceeds the MODE pin maximum rating, then the MODE pin is damaged. | A | ||
| AGND | 35 | VOUT1 and VOUT2 = 0 V, excessive current from VIN | B |
| VDDA | 36 | If VIN < 6.5 V, then VOUT1 and VOUT2 = regulation. | D |
| If VIN > 6.5 V and exceeds the VDDA pin maximum rating, then the VDDA pin is damaged. | A | ||
| RT | 37 | If VIN < 6.5 V, then VOUT1 and VOUT2 = 0 V. | B |
| If VIN > 6.5 V and exceeds the RT pin maximum rating, then the RT pin is damaged. | A | ||
| DITH | 38 | If VIN < 6.5 V, then VOUT1 and VOUT2 = regulation. | B |
| If VIN > 6.5 V and exceeds the DITH pin maximum rating, then the DITH pin is damaged. | A | ||
| SYNCOUT | 39 | If VIN < 6.5 V, then VOUT1 and VOUT2 = regulation. | B |
| If VIN > 6.5 V and exceeds the SYNCOUT pin maximum rating, then the SYNCOUT pin is damaged. | A | ||
| EN2 | 40 | VOUT1 and VOUT2 = regulation | D |