Datasheet

TPS40200-EP
www.ti.com SGLS371A –JANUARY 2007–REVISED JANUARY 2013
ELECTRICAL CHARACTERISTICS
–55°C < T
A
= T
J
< 125°C, V
DD
= 12 V, f
OSC
= 100 kHz (unless otherwise noted)
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
Voltage Reference
COMP = FB, T
J
= 25°C 689 696 702
T
J
= 25°C 686 696 703
V
FB
Feedback voltage mV
4.5 V < V
DD
< 52 V –40°C < T
J
< 125°C 679 696 710
–55°C < T
J
< 125°C 675 696 710
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
), for 12 V < V
DD
< 52 V 6 8 10 V
Quiescent Current
F
OSC
= 300 kHz, Driver not switching,
I
qq
Device quiescent current 1.5 3 mA
4.5 V < V
DD
< 52 V
Undervoltage Lockout (UVLO)
V
UVLO(on)
Turnon threshold 3.8 4.25 4.5
V
V
UVLO(off)
Turnoff threshold 4.05
V
UVLO(HYST)
Hysteresis 110 200 275 mV
Soft Start
R
SS(chg)
Internal soft-start pullup resistance 65 105 170 kΩ
Internal soft-start pulldown
R
SS(dchg)
190 305 485 kΩ
resistance
V
SSRST
Soft-start reset threshold 100 150 200 mV
Overcurrent Protection
0°C < T
J
< 125°C 65 100 140
V
ILIM
Overcurrent threshold 4.5 V < V
DD
< 52 V –40°C < T
J
< 125°C 55 100 140 mV
–55°C < T
J
< 125°C 35 100 150
OC
DF
Overcurrent duty cycle Note 1 2 %
V
ILIM(rst)
Overcurrent reset threshold 100 150 200 mV
Oscillator
Oscillator frequency range Note 35 500
F
OSC
R
RC
= 200 kΩ, C
RC
= 470 pF 85 100 115 kHz
Oscillator frequency
R
RC
= 68.1 kΩ, C
RC
= 470 pF 255 300 345
12 V < V
DD
< 52 V –9 0
Frequency line regulation %
4.5 V < V
DD
< 12 V –20 0
V
RMP
Ramp amplitude 4.5 V < V
DD
< 52 V V
DD
÷ 10 V
Pulse-Width Modulator
V
DD
= 12 V 200 500
t
MIN
Minimum controllable pulse width ns
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 87 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 Note 60 80 dB
GBWP Unity gain bandwidth Note 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
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