TPS43331-Q1
SLVSA38 –DECEMBER 2009
www.ti.com
SWITCHING REGULATORS ELECTRICAL CHARACTERISTICS
VBAT = VBATP = 6 V to 18 V, T
J
= -40ºC to 150ºC (unless otherwise noted)
PARAMETER TEST CONDITIONS MIN MAX UNIT
Switch mode regulators (Channel 1)
I
O
Output current 0.4
(1)
4.0 A
V
O
Regulated output voltage range 1.2 10 V
V
FB1
Feedback voltage input 980 1020 mV
I
O
= I
O
(max) to I
O
(min), Includes external feedback
V
OTOL
Regulated output voltage tolerance -5 5 %
resistors
V
ISCTH
Short circuit current, voltage threshold
(2)
60 120 mV
I
O
= I
O
(max), VBAT = 9 V, Includes drop due to
V
DO
Dropout voltage
(3)
400 mV
V
ISCTH
10 V/ms
dV/dt Output voltage soft-start slew rate
(4)
Step response on regulator enable, I
O
= I
O
(max)
5 %
V
P_SC
Overshoot
(5)
I
O
= I
SC
(max), Remove short 5 %
I
O
= I
O
(min) to I
O
(max) -5 %
V
P_TR
Load transient response
(5)
I
O
= I
O
(max) to I
O
(min) 5 %
I
VGT1_SRC
Gate drive source current (high side) 210 330 mA
I
VGT1_SINK
Gate drive sink current (high side) 500 1020 mA
VGT1 = VGB1 = 6 V, measure time calculate current
I
VGB1_SRC
Gate drive source current (low side) 90 135 mA
I
VGB1_SINK
Gate drive sink current (low side) 440 1300 mA
Switch mode regulators (Channel 2), SW2EN = 1 (unless otherwise noted)
I
O
Output current 0.4
(1)
4.0 A
V
O
Regulated output voltage range 1.2 10 V
V
FB1
Feedback voltage input 980 1020 mV
I
O
= I
O
(max) to I
O
(min), Includes external feedback
V
OTOL
Regulated output voltage tolerance -5 5 %
resistors
VI
SCTH
Short circuit current, voltage threshold
(2)
60 120 mV
I
O
= I
O
(max), VBAT = 9 V, Includes drop due to
V
DO
Dropout voltage
(3)
400 mV
V
ISCTH
dV/dt Output voltage soft-start slew rate
(4)
Step response on regulator enable, I
O
= I
O
(max) 10 V/ms
V
P_SC
Overshoot
(5)
I
O
= I
SC
(max), Remove short 5 %
I
O
= I
O
(min) to I
O
(max) -5 %
V
P_TR
Load transient response
(5)
I
O
= I
O
(max) to I
O
(min) 5 %
I
VGT2_SRC
Gate drive source current (High side) 210 330 mA
I
VGT2_SINK
Gate drive sink current (High side) 500 1020 mA
VGT1 = VGB1 = 6V, measure time calculate current
I
VGB2_SRC
Gate drive source current (Low side) 90 135 mA
I
VGB2_SINK
Gate drive sink current (Low side) 440 1300 mA
(1) MIN based on 10% of MAX current shown. For MAX lower currents I
O
MIN will be 10% of the lower MAX current.
(2) The output remains stable using soft-start conditions when the output drops from regulation to 0 V. The IC is not damaged by a hard
short to ground.
(3) Lower VBAT until the output drops to 0.1 V. Measure VBAT – V
O
.
(4) Design information- Not tested. Specified by CSLEW current and bench characterization.
(5) Design information – Not tested
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Product Folder Link(s): TPS43331-Q1
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