Datasheet

TPS40210-Q1, TPS40211-Q1
www.ti.com SLVS861D –AUGUST 2008–REVISED APRIL 2010
ELECTRICAL CHARACTERISTICS
T
J
= –40°C to 125°C, V
VDD
= 12 V
dc
, all parameters at zero power dissipation (unless otherwise noted)
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
Voltage Reference
T
J
= 25°C 693 700 707
COMP = FB,
TPS40210
4.5 ≤ V
VDD
≤ 52 V
–40°C ≤ T
J
≤ 125°C 686 700 714
V
FB
Feedback voltage range mV
T
J
= 25°C 254 260 266
COMP = FB,
TPS40211
4.5 ≤ V
VDD
≤ 52 V
–40°C ≤ T
J
≤ 125°C 250 260 270
Input Supply
V
VDD
Input voltage range 4.5 52 V
4.5 ≤ V
VDD
≤ 52 V, no switching, V
DIS
< 0.8 1.5 2.5 mA
I
VDD
Operating current 2.5 ≤ V
DIS
≤ 7 V 10 20 mA
V
VDD
< V
UVLO(on)
, V
DIS
< 0.8 530 mA
Undervoltage Lockout (UVLO)
V
UVLO(on)
Turn on threshold voltage 4.00 4.25 4.50 V
V
UVLO(hyst)
UVLO hysteresis 140 195 240 mV
Oscillator
Oscillator frequency range
(1)
35 1000
f
OSC
kHz
Oscillator frequency R
RC
= 182 kΩ, C
RC
= 330 pF 260 300 340
4.5 ≤ V
DD
≤ 52 V –20 7
Frequency line regulation %
7 ≤ V
DD
≤ 52 V -10 7
V
SLP
Slope compensation ramp 520 620 720 mV
PWM
V
VDD
= 12 V
(1)
275 400
t
ON(min)
Minimum pulse width ns
V
VDD
= 30 V 90 200
t
OFF(min)
Minimum off time 170 200 ns
V
VLY
Valley voltage 1.2 V
Soft-Start
Offset voltage from SS pin to error
V
SS(ofst)
1 V
amplifier input
R
SS(chg)
Soft-start charge resistance 320 430 600 kΩ
R
SS(dchg)
Soft-start discharge resistance 840 1200 1600 kΩ
Error Amplifier
GBWP Unity gain bandwidth product
(1)
1.5 3.0 MHz
A
OL
Open loop gain
(1)
60 80 dB
Input bias current (current out of FB
I
IB(FB)
100 300 nA
pin)
I
COMP(src)
Output source current V
FB
= 0.6 V, V
COMP
= 1 V 100 250 mA
I
COMP(snk)
Output sink current V
FB
= 1.2 V, V
COMP
= 1 V 1.2 2.5 mA
Overcurrent Protection
Overcurrent detection threshold (at
V
ISNS(oc)
4.5 ≤ V
DD
< 52 V, –40°C ≤ T
J
≤ 125°C 120 150 180 mV
ISNS pin)
D
OC
Overcurrent duty cycle
(1)
2 %
Overcurrent reset threshold voltage
V
SS(rst)
100 150 350 mV
(at SS pin)
T
BLNK
Leading edge blanking 75 ns
(1) Specified by design
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