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SLUS772 – MARCH 2008
ELECTRICAL CHARACTERISTICS
T
J
= –40°C to 125°C, V
VDD
= 12 V
dc
, all parameters at zero power dissipation (unless otherwise noted)
PARAMETER
VOLTAGE REFERENCE
Feedback voltage range
V
FB
TPS40210 COMP = FB, 4.5
≤
V
VDD
≤
52 V, T
J
= 25°C
TPS40211 COMP=FB, 4.5
≤
V
VDD
≤
52 V, T
J
= 25°C
TPS40210
TPS40211
INPUT SUPPLY
V
VDD
I
VDD
Input voltage range
4.5
≤
V
VDD
≤
52 V, no switching, V
DIS
< 0.8
Operating current
2.5
≤
V
DIS
≤
7 V
V
VDD
< V
UVLO(on)
, V
DIS
< 0.8
UNDERVOLTAGE LOCKOUT
V
UVLO(on)
V
UVLO(hyst)
Turn on threshold voltage
UVLO hysteresis
Oscillator frequency range
(1)
Oscillator frequency
Frequency line regulation
V
SLP
PWM
t
ON(min)
t
OFF(min)
V
VLY
Minimum pulse width
Minimum off time
Valley voltage
Offset voltage from SS pin to error
amplifier input
Soft-start charge resistance
Soft-start discharge resistance
Unity gain bandwidth product
(1)
Open loop gain
(1)
Input bias current (current out of FB
pin)
Output source current
Output sink current
Overcurrent detection threshold (at
ISNS pin)
Overcurrent duty cycle
(1)
Overcurrent reset threshold voltage (at
SS pin)
Leading edge blanking
(1)
100
150
75
V
FB
= 0.6 V, V
COMP
= 1 V
V
FB
= 1.2 V, V
COMP
= 1 V
100
1.2
320
840
1.5
60
V
VDD
= 12V
(1)
V
VDD
= 30V
275
90
170
1.2
400
200
200
V
ns
Slope compensation ramp
R
RC
= 182 kΩ, C
RC
= 330 pF
4.5
≤
V
DD
≤
52 V
4.00
140
35
260
-20%
520
620
300
4.25
195
4.50
240
1000
340
7%
720
mV
V
mV
4.5
1.5
10
52
2.5
20
530
V
mA
µA
µA
COMP = FB, 4.5
≤
V
VDD
≤
52 V, -40°C
≤
T
J
≤
125°C
COMP = FB, 4.5
≤
V
VDD
≤
52 V, -40°C
≤
T
J
≤
125°C
693
254
686
250
700
260
700
260
707
266
714
270
mV
TEST CONDITIONS
MIN
TYP
MAX
UNIT
OSCILLATOR
f
OSC
kHz
SOFT-START
V
SS(ofst)
R
SS(chg)
R
SS(dchg)
GBWP
A
OL
I
IB(FB)
I
COMP(src)
I
COMP(snk)
700
430
1200
3.0
80
100
250
2.5
300
600
1600
mV
kΩ
ERROR AMPLIFIER
MHz
dB
nA
µA
mA
OVERCURRENT PROTECTION
V
ISNS(oc)
D
OC
V
SS(rst)
T
BLNK
(1)
4.5
≤
V
DD
< 52 V, -40°C
≤
T
J
≤
125°C
120
150
180
2%
350
mV
ns
mV
Ensured by design. Not production tested.
Copyright © 2008, Texas Instruments Incorporated
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