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ZHCSHL8D December 2017 – August 2020 LMZM33602

PRODUCTION DATA

封裝選項

機械數(shù)據(jù) (封裝 | 引腳)

RLR|18
- MPQF481B

散熱焊盤機械數(shù)據(jù) (封裝 | 引腳)

訂購信息

6.5 Electrical Characteristics

Over –40°C to +105°C ambient temperature, V_IN = 24 V, V_OUT = 5 V, I_OUT = I_OUT maximum, f_sw = 450 kHz (unless otherwise noted); C_IN1 = 2 × 4.7-μF, 50-V, 1210 ceramic; C_IN2 = 100-μF, 50-V, electrolytic; C_OUT = 4 × 22-μF, 25-V, 1210 ceramic. Minimum and maximum limits are specified through production test or by design. Typical values represent the most likely parametric norm and are provided for reference only.

PARAMETER		TEST CONDITIONS		MIN	TYP	MAX	UNIT
INPUT VOLTAGE (V_IN)
V_IN	Input voltage	Over I_OUT range		4⁽¹⁾		36	V
UVLO	V_IN undervoltage lockout	V_IN increasing		3.3	3.6	3.9	V
UVLO	V_IN undervoltage lockout	V_IN decreasing		3	3.3	3.5	V
I_SHDN	Shutdown supply current	V_EN = 0 V, V_IN = 12 V			2	4	μA
OUTPUT VOLTAGE (V_OUT)
V_OUT(ADJ)	Output voltage adjust	Over I_OUT range		1		18	V
V_OUT(Ripple)	Output voltage ripple	20-MHz bandwidth			10		mV
FEEDBACK
V_FB	Feedback voltage⁽²⁾	T_A = 25°C, I_OUT = 0 A		0.985	1	1.015	V
	Feedback voltage⁽²⁾	Over V_IN range, –40°C ≤ T_J ≤ 125°C, I_OUT = 0 A		0.98	1	1.02	V
	Load regulation	Over I_OUT range, T_A = 25°C			0.04%
I_FB	Feedback leakage current	V_FB = 1 V			10		nA
CURRENT
I_OUT	Output current	Natural convection, T_A = 25°C		0		2	A
I_OUT	Overcurrent threshold				3.6		A
PERFORMANCE
?	Efficiency	V_IN = 24 V, I_OUT = 1 A	V_OUT = 12 V, f_SW = 900 kHz		94%
			V_OUT = 5 V, f_SW = 450 kHz		90%
			V_OUT = 3.3 V, f_SW = 300 kHz		88%
		V_IN = 12 V, I_OUT = 1 A	V_OUT = 5 V, f_SW = 450 kHz		93%
			V_OUT = 3.3 V, f_SW = 300 kHz		91%
			V_OUT = 2.5 V, f_SW = 250 kHz		89%
	Transient response	25% to 75% load step 1 A/μs slew rate	Over/undershoot		90		mV
	Transient response	25% to 75% load step 1 A/μs slew rate	Recovery time		55		μs
SOFT START
T_SS	Internal soft start time				6		ms
THERMAL
T_SHDN	Thermal shutdown	Shutdown temperature			170		°C
T_SHDN	Thermal shutdown	Hysteresis			15		°C
ENABLE (EN)
V_EN-H	EN rising threshold			1.4	1.55	1.7	V
V_EN-HYS	EN hysteresis voltage				0.4		V
I_EN	EN Input leakage current	V_IN = 4 V to 36 V, V_EN = 2 V			10	100	nA
I_EN	EN Input leakage current	V_IN = 4 V to 36 V, V_EN = 36 V				1	μA
POWER GOOD (PGOOD)
V_PGOOD	PGOOD thresholds	V_OUT rising (good)		92%	94%	96.5%
		V_OUT rising (fault)		104%	107%	110%
		V_OUT falling hysteresis			1.5%
	Minimum V_IN for valid PGOOD	50-μA pullup, V_EN = 0 V, T_A = 25°C				1.5	V
	PGOOD low voltage	0.5-mA pullup, V_EN = 0 V				0.4	V
CAPACITANCE
C_IN	External input capacitance	Ceramic type		9.4⁽³⁾			μF
C_IN	External input capacitance	Non-ceramic type			47⁽³⁾		μF
C_OUT	External output capacitance			min⁽⁴⁾		max⁽⁵⁾	μF

(1) See Voltage Dropout for information on voltage dropout.

(2) The overall output voltage tolerance will be affected by the tolerance of the external R_FBT and R_FBB resistors.

(3) A minimum of 9.4 μF (2 × 4.7 μF) ceramic input capacitance is required for proper operation. An additional 47 μF of bulk capacitance is recommended for applications with transient load requirements. See the Input Capacitors section of the datasheet for further guidance.

(4) The minimum amount of required output capacitance varies depending on the output voltage (see Output Capacitor Selection ). A minimum amount of ceramic output capacitance is required. Locate the capacitance close to the device. Adding additional ceramic or non-ceramic capacitance close to the load improves the response of the regulator to load transients.

(5) The maximum allowable output capacitance varies depending on the output voltage (see Output Capacitor Selection ).

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