Datasheet

TPS40200-Q1
www.ti.com SLUS739E –SEPTEMBER 2006–REVISED JULY 2013
ELECTRICAL CHARACTERISTICS
–40°C < T
A
< 125°C, V
DD
= 12 V, f
OSC
= 100 kHz (unless otherwise noted)
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
Voltage Reference
COMP = FB
V
FB
Feedback voltage –40°C < T
A
< 125°C 676 696 712 mV
4.5 V < V
DD
< 52 V
Gate Driver
I
src
Gate driver pullup current 125 300 mA
I
snk
Gate driver pulldown current 200 300 mA
V
GATE
Gate driver output voltage V
GATE
= (V
DD
– V
GDRV
), 12 V < V
DD
< 52 V 5.6 8 10 V
Quiescent Current
f
OSC
= 300 kHz, Driver not switching,
I
qq
Device quiescent current 1.5 3.0 mA
4.5 V < V
DD
< 52 V
Undervoltage Lockout (UVLO)
V
UVLO(on)
Turn-on threshold –40°C < T
A
< 125°C 3.8 4.25 4.55 V
V
UVLO(off)
Turn-off threshold 4.05 V
V
UVLO(HYST)
Hysteresis 110 200 275 mV
Soft Start
Internal soft-start pullup
R
SS(chg)
65 105 170 kΩ
resistance
Internal soft-start pulldown
R
SS(dchg)
190 305 485 kΩ
resistance
V
SSRST
Soft-start reset threshold 100 150 200 mV
Overcurrent Protection
V
ILIM
Overcurrent threshold 4.5 V < V
DD
< 52 V –40°C < T
A
< 125°C 50 100 140 mV
OC
DF
Overcurrent duty cycle See
(1)
2 %
V
ILIM(rst)
Overcurrent reset threshold 100 150 200 mV
Oscillator
Oscillator frequency range See
(1)
35 500
f
OSC
R
RC
= 200 kΩ, C
RC
= 470 pF 85 100 118 kHz
Oscillator frequency
R
RC
= 68.1 kΩ, C
RC
= 470 pF 210 300 345
12 V < V
DD
< 52 V -9 0
Frequency line regulation %
4.5 V < V
DD
< 12 V –21 0
V
RMP
Ramp amplitude 4.5 V < V
DD
< 52 V VDD/10 V
Pulse-Width Modulator
V
DD
= 12 V 200 540
Minimum controllable
t
MIN
ns
pulse width
V
DD
= 30 V 100 200
F
osc
= 100 kHz, C
L
= 470 pF 93 95
D
MAX
Maximum duty cycle %
F
osc
= 300 kHz, C
L
= 470 pF 90 93
Modulator and power-stage
K
PWM
8 10 12 V/V
dc gain
Error Amplifier
I
IB
Input bias current 100 250 nA
AOL Open loop gain See
(1)
60 80 dB
GBWP Unity gain bandwidth See
(1)
1.5 3 MHz
I
COMP(src)
Output source current V
FB
= 0.6 V, COMP = 1 V 100 250 μA
I
COMP(snk)
Output sink current V
FB
= 1.2 V, COMP = 1 V 1.0 2.5 mA
(1) Specified by design
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