Datasheet

LM25119/25119Q
SNVS680G –AUGUST 2010–REVISED JANUARY 2014 www.ti.com
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. Unless otherwise specified, the following conditions apply: VIN = 12 V, VCC = 8 V, VCCDIS = 0 V, EN2 = 5 V, R
T
=
25 kΩ, no load on LO and HO. Electrical characteristics are per channel where applicable. See
(1)
,
(2)
, and
(3)
.
Symbol Parameter Conditions Min Typ Max Units
VIN Supply
I
BIAS
VIN Operating Current SS1 = SS2 = 0 V 6 7.3 mA
VCCDIS = 2 V, SS1 = SS2 = 0 V 340 500 µA
I
VCC
VCC1 Operating Current VCCDIS = 2 V, SS1 = SS2 = 0 V 3.9 4.5 mA
VCC2 Operating Current VCCDIS = 2 V, SS1 = SS2 = 0 V 1.4 2.0 mA
I
SHUTDOWN
VIN Shutdown Current UVLO = 0 V, SS1 = SS2 = 0 V 15 33 µA
VCC Regulator
(4)
V
CC(REG)
VCC Regulation 6.77 7.6 8.34 V
VCC Regulation VIN = 4.5 V, No external load 4.4 4.46 V
VCC Sourcing Current Limit VCC = 0 V 25 40 mA
VCCDIS Switch Threshold VCCDIS Rising 1.19 1.25 1.29 V
VCCDIS Switch Hysteresis 0.07 V
VCCDIS Input Current VCCDIS = 0 V –20 nA
VCC Under-voltage Threshold Positive going VCC 3.8 4.0 4.2 V
VCC Under-voltage Hysteresis 0.2 V
EN2 Input
V
IL
EN2 Input Low Threshold 2.0 1.5 V
V
IH
EN2 Input High Threshold 2.9 2.5 V
EN2 Input pull-up resistor 50 kΩ
UVLO
UVLO Threshold UVLO Rising 1.20 1.25 1.29 V
UVLO Hysterisis Current UVLO = 1.4 V 15 20 25 µA
UVLO Shutdown Threshold 0.4 V
UVLO Shutdown Hysterisis Voltage 0.1 V
Soft Start
SS Current Source SS = 0 V 7 10 13 µA
SS Pull Down R
DSON
10 Ω
Error Amplifier
V
REF
FB Reference Voltage Measured at FB pin, FB = COMP 0.788 0.8 0.812 V
FB Input Bias Current FB = 0.8 V 1 nA
FB Disable Threshold Interleaved Threshold 2.5 V
COMP VOH Isource = 3mA 2.8 V
COMP VOL Isink = 3mA 0.31 V
A
OL
DC Gain 80 dB
f
BW
Unity Gain Bandwidth 3 MHz
PWM Comparators
t
HO(OFF)
Forced HO Off-time 220 320 430 ns
t
ON(min)
Minimum HO On-time C
RAMP
= 50 pF 100 ns
(1) Absolute Maximum Ratings are limits beyond which damage to the device may occur. Operating Ratings indicate conditions for which
the device is intended to be functional. For specifications and test conditions see the Electrical Characteristics Table.
(2) All limits are specified. All electrical characteristics having room temperature limits are tested during production at T
A
= 25°C. All hot and
cold limits are specified by correlating the electrical characteristics to process and temperature variations and applying statistical process
control.
(3) Min and Max limits are 100% production tested at 25°C. Limits over the operating temperature range are specified through correlation
using Statistical Quality Control (SQC) methods. Limits are used to calculate Texas Instrument's Average Outgoing Quality Level
(AOQL).
(4) Per VCC Regulator
6 Submit Documentation Feedback Copyright © 2010–2014, Texas Instruments Incorporated
Product Folder Links: LM25119/25119Q