Datasheet

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ELECTRICAL CHARACTERISTICS
TPS51200
SLUS812 – FEBRUARY 2008
Over recommended free-air temperature range, V
VIN
= 3.3 V,V
VLDOIN
= 1.8 V, V
REFIN
= 0.9 V, V
VOSNS
= 0.9 V, V
EN
= V
VIN
, C
OUT
= 3 × 10 µ F and circuit shown in Section 1 . (unless otherwise noted)
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
SUPPLY CURRENT
I
IN
Supply current T
A
= 25 ° C, V
EN
= 3.3 V, No Load 0.7 1 mA
T
A
= 25 ° C, V
EN
= 0 V, V
REFIN
= 0, No Load 65 80
I
IN(SDN)
Shutdown current µ A
T
A
= 25 ° C, V
EN
= 0 V, V
REFIN
> 0.4 V, No Load 200 400
I
LDOIN
Supply current ofVLDOIN T
A
= 25 ° C, V
EN
= 3.3 V, No Load 1 50 µ A
I
LDOIN(SDN)
Shutdown current of VLDOIN T
A
= 25 ° C, V
EN
= 0 V, No Load 0.1 50 µ A
INPUT CURRENT
I
REFIN
Input current, REFIN V
EN
= 3.3 V 1 µ A
VO OUTPUT
1.25 V
V
REFOUT
= 1.25 V (DDR1), I
O
= 0 A
– 15 15 mV
0.9 V
V
VOSNS
Output DC voltage, VO V
REFOUT
= 0.9 V (DDR2), I
O
= 0 A
– 15 15 mV
0.75 V
V
LDOIN
= 1.5 V, V
REFOUT
= 0.75 V (DDR3), I
O
= 0 A
– 15 15 mV
Output voltage tolerance to
V
VOTOL
– 2A < I
VO
< 2A – 25 25 mV
REFOUT
I
VOSRCL
VO source vurrent Limit With reference to REFOUT, V
OSNS
= 90% × V
REFOUT
3 4.5 A
I
VOSNCL
VO sink current Limit With reference to REFOUT, V
OSNS
= 110% × V
REFOUT
3.5 5.5 A
I
DSCHRG
Discharge current, VO V
REFIN
= 0 V, V
VO
= 0.3 V, V
EN
= 0 V, T
A
= 25 ° C 18 25 Ω
POWERGOOD COMPARATOR
PGOOD window lower threshold with respect to REFOUT – 23.5% – 20% – 17.5%
V
TH(PG)
VO PGOOD threshold PGOOD window upper threshold with respect to REFOUT 17.5% 20% 23.5%
PGOOD hysteresis 5%
T
PGSTUPDLY
PGOOD startup delay Startup rising edge, VOSNS within 15% of REFOUT 2 ms
V
PGOODLOW
Output low voltage I
SINK
= 4 mA 0.4 V
T
PBADDLY
PGOOD bad delay VOSNS is outside of the ± 20% PGOOD window 10 µ s
V
OSNS
= V
REFIN
(PGOOD high impedance),
I
PGOODLK
Leakage current
(1)
1 µ A
PGOOD = V
IN
+ 0.2 V
REFIN AND REFOUT
V
REFIN
REFIN voltage range 0.5 1.8 V
V
REFINUVLO
REFIN undervoltage lockout REFIN rising 360 390 420 mV
REFIN undervoltage lockout
V
REFINUVHYS
20 mV
hysteresis
V
REFOUT
REFOUT voltage REFIN V
– 10 mA < I
REFOUT
< 10 mA, V
REFIN
= 1.25 V – 15 15
– 10 mA < I
REFOUT
< 10 mA, V
VREFIN
= 0.9 V – 15 15 mV
REFOUT voltage tolerance to
V
REFOUTTOL
V
REFIN
– 10 mA < I
REFOUT
< 10 mA, V
REFIN
= 0.75V – 15 15
– 10 mA < I
REFOUT
< 10 mA, V
REFIN
= 0.6 V – 15 15
I
REFOUTSRCL
REFOUT source current limit V
REFOUT
= 0 V 10 40 mA
I
REFOUTSNCL
REFOUT sink current limit V
REFOUT
= 0 V 10 40 mA
(1) Ensured by design. Not production tested.
Copyright © 2008, Texas Instruments Incorporated 3
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