Datasheet

TPS40192, TPS40193
SLUS719E –MARCH 2007–REVISED MAY 2013 www.ti.com
ELECTRICAL CHARACTERISTICS
T
J
= –40°C to 85°C, V
VDD
= 12 V
dc
, all parameters at zero power dissipation (unless otherwise noted)
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
REFERENCE
0°C ≤ T
J
≤ 85°C 588 591 594
V
FB
Feedback voltage range mV
-40°C ≤ T
J
≤ 85°C 585 591 594
INPUT SUPPLY
V
VDD
Input voltage range 4.5 18.0 V
V
ENABLE
= 3 V 2.5 4.0 mA
I
VDD
Operating current
V
ENABLE
= 0.6 V 45 70 μA
ON BOARD REGULATOR
V
5VBP
Output voltage V
VDD
> 6 V, I
5VBP
≤ 10 mA 5.1 5.3 5.5 V
V
DO
Regulator dropout voltage V
VDD
- V
BP5
, V
VDD
= 5 V, I
BP5
≤ 25 mA 350 550 mV
I
SC
Regulator current limit threshold 50
mA
I
BP5
Average current 50
OSCILLATOR
TPS40193 240 300 360
f
SW
Switching frequency kHz
TPS40192 500 600 700
V
RMP
Ramp amplitude
(1)
1 V
PWM
D
MAX
Maximum duty cycle
(1)
85%
t
ON(min)
Minimum controlled pulse
(1)
110
HDRV off to LDRV on 50 ns
t
DEAD
Output driver dead time
LDRV off to HDRV on 25
SOFT-START
t
SS
Soft-start time 3 4 6
t
SSDLY
Soft-start delay time 2 ms
t
REG
Time to regulation 6
ERROR AMPLIFIER
GBWP Gain bandwidth product
(1)
7 10 MHz
A
OL
DC gain
(1)
60 dB
Input bias current (current out of FB
I
IB
100 nA
pin)
I
EAOP
Output source current V
FB
= 0 V 1
mA
I
EAOM
Output sink current V
FB
= 2 V 1
SHORT CIRCUIT PROTECTION
t
PSS(min)
Minimum pulse during short circuit
(1)
250
ns
t
BLNK
Blanking time
(1)
60 90 120
t
OFF
Off-time between restart attempts 30 50 ms
R
COMP(GND)
= OPEN, T
J
= 25°C 160 200 240
Short circuit comparator threshold
V
ILIM
R
COMP(GND)
= 4 kΩ, T
J
= 25°C 80 100 120
voltage
mV
R
COMP(GND)
= 12 kΩ, T
J
= 25°C 228 280 342
Short circuit threshold voltage on high-
V
ILIMH
T
J
= 25°C 400 550 650
side MOSFET
(1) Specified by design. Not production tested.
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