Datasheet

TPS40140
SLUS660H –SEPTEMBER 2005–REVISED JUNE 2013 www.ti.com
ELECTRICAL CHARACTERISTICS (continued)
–40°C ≤ T
J
≤ 85°C, (unless otherwise noted), V
VDD
= 7 V, V
BP5
= 5 V, UVLO_CE1, UCLO_CE2: 10 kΩ, Pullup to BP5,
f
SW
= 300 kHz, unless otherwise noted
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
VOLTAGE TRACKING (TRK1, TRK2)
After EN, before PWM and during hiccup mode 5 6.0 7.3 μA
SS source current
After first PWM pulse 10 12.5 15 μA
Fault Enable Threshold
(1)
1.4 V
Internal Clamp Voltage
(1)
2.4 V
SS sink resistance
(1)
Pull-down resistance 1 kΩ
CURRENT SENSE AMPLIFIERS (CS1, CS2)
Differential input voltage –60 60 mV
Input offset voltage CS1, CS2, Trimmed –2.0 0 2.0 mV
Ac Gain transfer to PWM COMP 5 mV < V
CS
< 60 mV, V
CSRT
= 1.5 V 12 13 14 V/V
Input common mode
(1)
0 5.8 V
CSA Input bias current 100 nA
DIFFERENTIAL AMPLIFIER (DIFFO)
Gain 1.0 V < V
OUT
< 5.8 V 0.997 1 1.003 V/V
Input Common Mode Range
(1)
0 5.8 V
V
OUT
– V
VGSNS
= 2 V, V
DIFFO
> 1.98 V,
Output Source Current
(1)
2
VDD-V
OUT
> 2 V
V
OUT
– V
VGSNS
= 2 V, V
DIFFO
> 2.02 V VDD-
Output Source Current
(1)
1 mA
V
OUT
=1 V
V
OUT
–V
VGSNS
= 2 V,
Output Sink Current
(1)
2
V
DIFFO
> 2.02 V
Unity gain bandwidth
(1)
5 8 MHz
Input Impedance, non inverting
(1)
V
OUT
to GND 60
kΩ
Input Impedance, inverting
(1)
GSNS to DIFFO 60
GATE DRIVERS
HDRV1, HDRV2 Source On V
BOOT1
, V
BOOT2
= 5 V, V
SW1
= V
SW2
= 0 V,
1 2 3
Resistance Sourcing 100 mA
HDRV1, HDRV2 Sink On V
VREG
= 5 V, V
SW1
= V
SW2
= 0 V,
0.5 1.2 2
Resistance Sinking 100 mA
Ω
LDRV1, LDRV2 Source On V
VREG
= 5 V, V
SW1
= V
SW2
= 0 V,
1 2 3
Resistance Sourcing 100 mA
LDRV1, LDRV2 Sink On V
VREG
= 5V, V
SW1
= V
SW2
= 0 V,
0.3 0.65 1
Resistance Sinking 100 mA
t
RISE
HDRVx rise time
(1)
C
LOAD
= 3.3 nF 25 75
t
FALL
HDRVx fall time
(1)
C
LOAD
= 3.3 nF 25 75
t
RISE
LDRVx rise time
(1)
C
LOAD
= 3.3 nF 25 75 ns
t
FALL
LDRVx fall time
(1)
C
LOAD
= 3.3nF 20 60
Minimum Controllable On-Time C
LOAD
= 3.3nF 50
OUTPUT UNDERVOLTAGE FAULT
V
FB
relative to V
REF
-19% -16.5% -14%
Undervoltage delay
(1)
3 μs
CURRENT LIMIT
I
ILIM
Output current 18.8 20 21.2 μA
(1) Specified by design. Not production tested.
6 DEVICE RATINGS Copyright © 2005–2013, Texas Instruments Incorporated
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