ZHCS338D October 2011 – August 2016 TPS54295
PRODUCTION DATA.
- 1 特性
- 2 應(yīng)用范圍
- 3 說明
- 4 修訂歷史記錄
- 5 Pin Configuration and Functions
- 6 Specifications
- 7 Detailed Description
- 8 Application and Implementation
- 9 Power Supply Recommendations
- 10Layout
- 11器件和文檔支持
- 12機械、封裝和可訂購信息
封裝選項
機械數(shù)據(jù) (封裝 | 引腳)
散熱焊盤機械數(shù)據(jù) (封裝 | 引腳)
訂購信息
6 Specifications
6.1 Absolute Maximum Ratings
over operating free-air temperature range (unless otherwise noted)(1)(2)| MIN | MAX | UNIT | ||
|---|---|---|---|---|
| Input voltage | VIN1, VIN2, EN1, EN2 | –0.3 | 20 | V |
| VBST1, VBST2 | –0.3 | 26 | ||
| VBST1, VBST2 (10-ns transient) | –0.3 | 28 | ||
| VBST1 – SW1 , VBST2 – SW2 | –0.3 | 6.5 | ||
| VFB1, VFB2 | –0.3 | 6.5 | ||
| SW1, SW2 | –2 | 20 | ||
| SW1, SW2 (10-ns transient) | –3 | 22 | ||
| Output voltage | VREG5, SS1, SS2 | –0.3 | 6.5 | V |
| PGND1, PGND2 | –0.3 | 0.3 | ||
| Junction temperature, TJ | –40 | 150 | °C | |
| Storage temperature, Tstg | –55 | 150 | °C | |
(1) Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. These are stress ratings only, which do not imply functional operation of the device at these or any other conditions beyond those indicated under Recommended Operating Conditions. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.
(2) All voltages are with respect to IC GND terminal.
6.2 ESD Ratings
| VALUE | UNIT | |||
|---|---|---|---|---|
| V(ESD) | Electrostatic discharge | Human-body model (HBM), per ANSI/ESDA/JEDEC JS-001(1) | ±2000 | V |
| Charged-device model (CDM), per JEDEC specification JESD22-C101(2) | ±500 | |||
(1) JEDEC document JEP155 states that 500-V HBM allows safe manufacturing with a standard ESD control process.
(2) JEDEC document JEP157 states that 250-V CDM allows safe manufacturing with a standard ESD control process.
6.3 Recommended Operating Conditions
over operating free-air temperature range (unless otherwise noted)| MIN | MAX | UNIT | |||
|---|---|---|---|---|---|
| Supply input voltage | VIN1, VIN2 | 4.5 | 18 | V | |
| Input voltage | VBST1, VBST2 | –0.1 | 24 | V | |
| VBST1, VBST2 (10-ns transient) | –0.1 | 27 | |||
| VBST1 – SW1, VBST2 – SW2 | –0.1 | 5.7 | |||
| VFB1, VFB2 | –0.1 | 5.7 | |||
| EN1, EN2 | –0.1 | 18 | |||
| SW1, SW2 | –1 | 18 | |||
| SW1, SW2 (10-ns transient) | –3 | 21 | |||
| Output voltage | VREG5, SS1, SS2 | –0.1 | 5.7 | V | |
| PGND1, PGND2 | –0.1 | 0.1 | |||
| VO1, VO2 | 0.76 | 7 | |||
| TJ | Operating Junction Temperature | –40 | 125 | °C | |
6.4 Thermal Information
| THERMAL METRIC(1) | TPS54295 | UNIT | ||
|---|---|---|---|---|
| PWP (HTSSOP) | RSA (VQFN) | |||
| 16 PINS | 16 PINS | |||
| RθJA | Junction-to-ambient thermal resistance | 47.5 | 34.9 | °C/W |
| RθJC(top) | Junction-to-case (top) thermal resistance | 27.1 | 40 | °C/W |
| RθJB | Junction-to-board thermal resistance | 20.8 | 11.8 | °C/W |
| ψJT | Junction-to-top characterization parameter | 1 | 0.7 | °C/W |
| ψJB | Junction-to-board characterization parameter | 20.6 | 11.3 | °C/W |
| RθJC(bot) | Junction-to-case (bottom) thermal resistance | 2.7 | 3.3 | °C/W |
(1) For more information about traditional and new thermal metrics, see the Semiconductor and IC Package Thermal Metrics application report.
6.5 Electrical Characteristics
over recommended free-air temperature range, VIN = 12 V (unless otherwise noted)| PARAMETER | TEST CONDITIONS | MIN | TYP | MAX | UNIT | |
|---|---|---|---|---|---|---|
| SUPPLY CURRENT | ||||||
| IIN | VINx supply current | TA = 25°C, VEN1 = VEN2 = 5 V, VVFB1 = VVFB2 = 0.8 V | 1300 | 2000 | µA | |
| IVINSDN | VINx shutdown current | TA = 25°C, VEN1 = VEN2 = 0 V | 80 | 150 | µA | |
| FEEDBACK VOLTAGE | ||||||
| VVFBTHLx | VFBx threshold voltage | TA = 25°C, VCH1 = 3.3 V, VCH2 = 1.5 V | 758 | 765 | 773 | mV |
| TCVFBx | Temperature coefficient | On the basis of 25°C(1) | –115 | 115 | ppm/℃ | |
| IVFBx | VFBx Input Current | VVFBx = 0.8 V, TA = 25°C | –0.35 | 0.2 | 0.35 | µA |
| VREG5 OUTPUT | ||||||
| VVREG5 | VREG5 output voltage | TA = 25°C, 6 V < VIN1 < 18 V, IVREG5 = 5 mA | 5.5 | V | ||
| IVREG5 | Output current | VIN1 = 6 V, VVREG5 = 4 V, TA = 25°C(1) | 75 | mA | ||
| MOSFETs | ||||||
| rDS(ON)H | High-side switch resistance | TA = 25℃, VVBSTx – VSWx = 5.5 V (1) | 150 | mΩ | ||
| rDS(ON)L | Low-side switch resistance | TA = 25℃ (1) | 100 | mΩ | ||
| ON-TIME TIMER CONTROL | ||||||
| TON1 | SW1 ON time | VSW1 = 12 V, VOUT1 = 1.2 V | 165 | ns | ||
| TON2 | SW2 ON time | VSW2 = 12 V, VOUT2 = 1.2 V | 165 | ns | ||
| TOFF1 | SW1 minimum OFF time | TA = 25℃, VVFB1 = 0.7 V(1) | 220 | ns | ||
| TOFF2 | SW2 minimum OFF time | TA = 25℃, VVFB2 = 0.7 V(1) | 220 | ns | ||
| SOFT START | ||||||
| ISSC | SSx charge current | VSSx = 0.5 V, TA = 25℃ | –8.4 | –8 | –7.6 | µA |
| TCISSC | ISSC temperature coefficient | On the basis of 25°C(1) (PWP) | –4 | 3 | nA/°C | |
| On the basis of 25°C(1) (RSA) | –4 | 5 | ||||
| ISSD | SSx discharge current | VSSx = 0.5 V | 3 | 7 | 10 | mA |
| UVLO | ||||||
| VUVREG5 | VREG5 UVLO threshold | VREG5 rising | 3.83 | V | ||
| Hysteresis | 0.6 | |||||
| LOGIC THRESHOLDS | ||||||
| VENxH | ENx H-level threshold voltage | 2 | V | |||
| VENxL | ENx L-level threshold voltage | 0.4 | V | |||
| RENx_IN | ENx input resistance | VENx = 12 V | 225 | 450 | 900 | kΩ |
| CURRENT LIMITS | ||||||
| IOCL | Current limit | LOUT = 2.2 µH(1) | 2.7 | 3.9 | 4.5 | A |
| OUTPUT UNDERVOLTAGE AND OVERVOLTAGE PROTECTION (UVP, OVP) | ||||||
| VOVP | Output OVP trip threshold | measured on VFBx | 115% | 120% | 125% | |
| TOVPDEL | Output OVP prop delay | 3 | 10 | µs | ||
| VUVP | Output UVP trip threshold | measured on VFBx | 63% | 68% | 73% | |
| TUVPDEL | Output UVP delay time | 1.5 | ms | |||
| TUVPEN | Output UVP enable delay | UVP enable delay and soft-start time | × 1.4 | × 1.7 | × 2 | |
| THERMAL SHUTDOWN | ||||||
| TSD | Thermal shutdown threshold | Shutdown temperature(1) | 155 | °C | ||
| Hysteresis(1) | 25 | |||||
6.6 Typical Characteristics
One output is enabled unless otherwise noted. VI = VIN1 or VIN2. VIN = 12 V, TA = 25°C (unless otherwise noted).
| VENx = 12 V |
| VOUT2 = 1.5 V |
| VOUT2 = 1.5 V |
| VOUT1 = 3.3 V |
| VOUT2 = 1.5 V |
| VOUT2 = 1.5 V |
| VOUT2 = 1.5 V |
Figure 2. Input Shutdown Current vs Junction Temperature
| VOUT1 = 3.3 V |
| VOUT1 = 3.3 V |
| VOUT1 = 3.3 V |
| VOUT1 = 1.5 V |
| VOUT1 = 3.3 V |
| VOUT1 = 3.3 V |