Datasheet
LM5116
www.ti.com
SNVS499G –FEBRUARY 2007–REVISED MARCH 2013
Electrical Characteristics
Limits in standard type are for T
J
= 25°C only; limits in boldface type apply over the junction temperature range of -40°C to
+125°C and are provided for reference only. Unless otherwise specified, the following conditions apply: VIN = 48V, VCC =
7.4V, VCCX = 0V, EN = 5V, R
T
= 16 kΩ, no load on LO and HO.
Symbol Parameter Conditions Min Typ Max Units
VIN Supply
I
BIAS
VIN Operating Current VCCX = 0V, VIN = 48V 5 7 mA
VCCX = 0V, VIN = 100V 5.9 8 mA
I
BIASX
VIN Operating Current VCCX = 5V, VIN = 48V 1.2 1.7 mA
VCCX = 5V, VIN = 100V 1.6 2.3 mA
I
STDBY
VIN Shutdown Current EN = 0V, VIN = 48V 1 10 µA
EN = 0V, VIN = 100V 1 µA
VCC Regulator
V
CC(REG)
VCC Regulation 7.1 7.4 7.7 V
VCC LDO Mode Turn-off 10.6 V
VCC Regulation VIN = 6V 5.0 5.9 6.0 V
VCC Sourcing Current Limit VCC = 0V 15 26 mA
VCCX Switch Threshold VCCX Rising 4.3 4.5 4.7 V
VCCX Switch Hysteresis 0.25 V
VCCX Switch R
DS(ON)
ICCX = 10 mA 3.8 6.2 Ω
VCCX Leakage VCCX = 0V -200 nA
VCCX Pull- down Resistance VCCX = 3V 100 kΩ
VCC Under-voltage Threshold VCC Rising 4.3 4.5 4.7 V
VCC Under-voltage Hysteresis 0.2 V
HB DC Bias Current HB - SW = 15V 125 200 µA
EN Input
VIL max EN Input Low Threshold 0.5 V
VIH min EN Input High Threshold 3.3 V
EN Input Bias Current VEN = 3V -7.5 -3 1 µA
EN Input Bias Current VEN = 0.5V -1 0 1 µA
EN Input Bias Current VEN = 100V 20 90 µA
UVLO Thresholds
UVLO Standby Threshold UVLO Rising 1.170 1.215 1.262 V
UVLO Threshold Hysteresis 0.1 V
UVLO Pull-up Current Source UVLO = 0V 5.4 µA
UVLO Pull-down R
DS(ON)
80 210 Ω
Soft Start
SS Current Source SS = 0V 8 11 14 µA
SS Diode Emulation Ramp Disable SS Rising 3 V
Threshold
SS to FB Offset FB = 1.25V 160 mV
SS Output Low Voltage Sinking 100 µA, UVLO = 0V 45 mV
Error Amplifier
Measured at FB pin, FB =
V
REF
FB Reference Voltage 1.195 1.215 1.231 V
COMP
FB Input Bias Current FB = 2V 15 500 nA
COMP Sink/Source Current 3 mA
A
OL
DC Gain 80 dB
f
BW
Unity Gain Bandwidth 3 MHz
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