Datasheet

TPS40060
TPS40061
www.ti.com SLUS543F –DECEMBER 2002–REVISED JUNE 2013
ELECTRICAL CHARACTERISTICS
T
A
= –40°C to 85°C, V
IN
= 24 V
dc
, R
T
= 165 kΩ, I
KFF
= 113 µA, f
SW
= 300 kHz, all parameters at zero power dissipation (unless
otherwise noted)
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
INPUT SUPPLY
V
IN
Input voltage range, VIN 10 55 V
OPERATING CURRENT
I
DD
Quiescent current Output drivers not switching 1.5 2.5 mA
5-V REFERENCE
V
BP5
Input voltage 4.5 5.0 5.5 V
OSCILLATOR/RAMP GENERATOR
(1)
f
OSC
Frequency 270 300 330 kHz
V
RAMP
PWM ramp voltage
(2)
2
V
IH
High-level input voltage, SYNC 2 V
V
IL
Low-level input voltage, SYNC 0.8
I
SYNC
Input current, SYNC 5 10 µA
Pulse width, SYNC Pulse amplitude = 5 V 50 ns
V
RT
RT voltage 2.32 2.50 2.68 V
Maximum duty cycle V
FB
= 0 V, 100 kHz ≤ f
SW
≤ 1 MHz 85% 98%
Minimum duty cycle V
FB
≥ 0.75 V 0%
V
KFF
Feed-forward voltage 3.35 3.50 3.65 V
I
KFF
Feed-forward current operating range
(2)
20 1100 µA
SS/SD (SOFT START)
I
SS
Soft-start source current 1.5 2.3 2.9 µA
V
SS
Soft-start clamp voltage 3.1 3.7 4.0 V
t
DSCH
Discharge time C
SS
= 220 pF 1.6 2.2 2.9
µs
t
SS
Soft-start time C
SS
= 220 pF, 0 V ≤ V
SS
≤ 1.6 V 120 155 235
SS/SD (SHUTDOWN)
V
SD
Shutdown threshold voltage 90 130 160
V
EN
Device action threshold voltage 170 210 260 mV
Hysteresis 80
10-V REFERENCE
V
BP10
Input voltage 9.0 9.7 10.7 V
ERROR AMPLIFIER
T
A
= 25°C 0.698 0.700 0.704
V
FB
Feedback regulation voltage 0°C ≤ T
A
≤ 85°C 0.690 0.700 0.707 V
0.690 0.700 0.715
G
BW
Gain bandwidth 3 5 MHz
A
VOL
Open loop gain 60 80 dB
I
OH
High-level output source current V
COMP
= 2.0 V, V
FB
= 0 V 1.5 4.0
mA
I
OL
Low-level output sink current V
COMP
= 2.0 V, V
FB
= 1 V 2.5 4.0
I
BIAS
Input bias current V
FB
= 0.7 V 100 300 nA
V
OH
High-level output voltage I
OH
= 0.5 mA, V
FB
= 0 V 3.25 3.45 3.60
V
V
OL
Low-level output voltage I
OL
= 0.5 mA, V
FB
= 1 V 0.050 0.215 0.350
(1) KFF current (I
KFF
) increases with SYNC frequency (f
SYNC
) and decreases with maximum duty cycle (D
MAX
).
(2) Ensured by design. Not production tested.
Copyright © 2002–2013, Texas Instruments Incorporated Submit Documentation Feedback 3
Product Folder Links: TPS40060 TPS40061