SNVSBU7 Data sheet

SNVSBU7 September 2020 LM34966-Q1

PRODUCTION DATA

7.5 Electrical Characteristics

Typical values correspond to T_J = 25°C. Minimum and maximum limits apply over T_J = -40°C to 150°C. Unless otherwise stated, V_BIAS = 12 V, R_T = 220 kΩ

PARAMETER		TEST CONDITIONS	MIN	TYP	MAX	UNIT
SUPPLY CURRENT
I_{SHUTDOWN(BIAS)}	BIAS shutdown current	V_BIAS = 12 V, V_UVLO = 0 V		2.6	6	μA
I_{OPERATING(BIAS)}	BIAS operating current	V_BIAS = 12 V, V_UVLO = 2.0 V, V_FB = V_REF, R_T = 220 kΩ		490	1200	μA
VCC REGULATOR
V_VCC-REG	VCC regulation	V_BIAS = 8 V, No load	6.5	6.85	7	V
	VCC regulation	V_BIAS = 8 V, I_VCC = 35 mA	6.5			V
V_{VCC-UVLO(RISING)}	VCC UVLO threshold	VCC rising	2.75	2.85	2.95	V
	VCC UVLO hysteresis	VCC falling		0.063		V
I_VCC-CL	VCC sourcing current limit	V_BIAS = 10 V, V_VCC = 0 V	20	110		mA
ENABLE
V_EN(RISING)	Enable threshold	EN rising	0.4	0.52	0.7	V
V_EN(FALLING)	Enable threshold	EN falling	0.33	0.49	0.63	V
V_EN(HYS)	Enable hysteresis	EN falling		0.03		V
UVLO/SYNC
V_UVLO(RISING)	UVLO / SYNC threshold	UVLO rising	1.425	1.5	1.575	V
V_{UVLO(FALLING)}	UVLO / SYNC threshold	UVLO falling	1.370	1.45	1.520	V
V_UVLO(HYS)	UVLO / SYNC threshold hysteresis	UVLO falling		0.05		V
I_UVLO	UVLO hysteresis current	V_UVLO = 1.6 V	4	5	6	μA
SS
I_SS	Soft-start current		9	10	11	μA
	SS pull-down switch r_DS(on)			55		Ω
PULSE WIDTH MODULATION
fsw	Switching frequency	R_T = 220 kΩ, V_BIAS = 4 V	85	100	115	kHz
D_MAX	Maximum duty cycle limit	R_T = 220 kΩ, V_BIAS = 4 V	90	93	96	%
CURRENT SENSE
I_SLOPE	Peak slope compensation current	R_T = 220 kΩ	22.5	30	37.5	μA
V_CLTH	Current Limit threshold (CS-PGND)		93	100	107	mV
HICCUP MODE PROTECTION
	Hiccup enable cycles			64		Cycles
	Hiccup timer reset cycles			8		Cycles
ERROR AMPLIFIER
V_REF	FB reference		0.99	1	1.01	V
Gm	Transconductance			2		mA/V
	COMP sourcing current	V_COMP = 1.2V	180			μA
	COMP clamp voltage	COMP rising (V_UVLO = 2.0 V)	2.5	2.8		V
	COMP clamp voltage	COMP falling		1	1.15	V
OVP
V_OVTH	Over-voltage threshold	FB rising (in reference to V_REF)	107	110	113	%
	Over-voltage threshold	FB falling (in reference to V_REF)		105		%
PGOOD
	PGOOD pull-down switch r_DS(on)	1 mA sinking		90		Ω
V_UVTH	Under-voltage threshold	FB falling (in reference to V_REF)	87	90	93	%
	Under-voltage threshold	FB rising (in reference to V_REF)		95		%
MOSFET DRIVER
	High-state voltage drop	100 mA sinking		0.25		V
	Low-state voltage drop	100 mA sourcing		0.15		V
THERMAL SHUTDOWN
T_TSD	Thermal shutdown threshold	Temperature rising		175		°C
	Thermal shutdown hysteresis			15		°C