Datasheet

TPS40090
TPS40091
www.ti.com SLUS578B –OCTOBER 2003– REVISED MAY 2006
ELECTRICAL CHARACTERISTICS (continued)
T
A
= -40°C to 85°C, V
IN
= 12 V, R
(RT)
= 64.9 kΩ, T
J
= T
A
(unless otherwise noted)
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
CURRENT SENSE AMPLIFIER
Gain transfer 100 mV ≤ V
(CS)
≤ 100 mV, V
CSRTN
= 1.5 V 4.9 5.4 5.9 V/V
Gain variance between phases V
CS
= 100 mV -4% 4%
Input offset variance at zero current V
CS
= 0 V -3.5 0 3.5 mV
Input common mode
(3)
0 4 V
Bandwidth
(3)
18 MHz
DIFFERENTIAL AMPLIFIER
Gain 1 V/V
Gain tolerance V
OUT
4 V vs 0.7 V, V
GNDS
= 0 V -0.5% 0.5%
CMRR Common mode rejection ratio
(3)
0.7 V ≤ V
OUT
≤ 4 V 60 dB
Bandwidth
(3)
5 MHz
RAMP
Ramp amplitude
(3)
0.4 0.5 0.6 V
POWER GOOD
PGOOD high threshold wrt V
REF
10% 14%
PGOOD low threshold wrt V
REF
-14% -10%
V
OL
Low-level output voltage I
PGOOD
= 4 mA 0.35 0.60 V
I
lkg
PGOOD output leakage V
PGOOD
= 5 V 50 80 μA
OUTPUT OVERVOLTAGE/UNDERVOLTAGE FAULT
V
OV
Overvoltage threshold voltage V
FBK
relative to V
REF
15% 19%
V
UV
Undervoltage threshold voltage V
FBK
relative to V
REF
-18% -14%
LOAD LINE PROGRAMMING
I
DROOP
Pull-down current on DROOP 4-phase, V
CS
= 100 mV 40 μA
(3) Specified by design. Not production tested.
Copyright © 2003–2006, Texas Instruments Incorporated Submit Documentation Feedback 5
Product Folder Link(s): TPS40090 TPS40091