Datasheet

TPS62052, TPS62054
TPS62056, TPS62050, TPS62051
www.ti.com SLVS432E –SEPTEMBER 2002–REVISED JUNE 2011
ELECTRICAL CHARACTERISTICS
V
I
= 7.2 V, V
O
= 3.3 V, I
O
= 300 mA, EN = V
I
, T
A
= –40°C to 85°C (unless otherwise noted)
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
SUPPLY CURRENT
V
I
Input voltage range 2.7 10 V
I
(Q)
Operating quiescent current I
O
= 0 mA, SYNC = GND, V
I
= 7.2 V 12 20 µA
EN = GND 1.5 5
I
(SD)
Shutdown current µA
EN = GND, T
A
=25°C 1.5 3
Quiescent current with enhanced LBI comparator
I
Q(LBI)
EN = V
I
, LBI=GND, TPS62051 only 5 µA
version.
ENABLE
V
IH
EN high level input voltage 1.3 V
V
IL
EN low level input voltage 0.3 V
EN trip point hysteresis 100 mV
I
lkg
EN input leakage current EN = GND or VIN, V
I
= 7.2 V 0.01 0.2 µA
I
(EN)
EN input current 0.6 V ≤ V
(EN)
≤ 4 V 2 µA
V
(UVLO)
Undervoltage lockout threshold 1.6 V
POWER SWITCH
V
I
≥ 5.4 V; I
O
= 300 mA 400 650
r
DS(on)
P-channel MOSFET on-resistance mΩ
V
I
= 2.7 V; I
O
= 300 mA 600 850
P-channel MOSFET leakage current V
DS
= 10 V 1 µA
P-channel MOSFET current limit V
I
= 7.2V, V
O
= 3.3 V 1000 1200 1400 mA
V
I
≥ 5.4 V; I
O
= 300 mA 300 450
r
DS(on)
N-channel MOSFET on-resistance mΩ
V
I
= 2.7 V; I
O
= 300 mA 450 550
N-channel MOSFET leakage current V
DS
= 6 V 1 µA
POWER GOOD OUTPUT, LBI, LBO
V
(PG)
Power good trip voltage Vml -2% V
V
O
ramping positive 50
Power good delay time µs
V
O
ramping negative 200
V
OL
PG, LBO output low voltage V
(FB)
= 0.8 x V
O
nominal, I
(sink)
= 1 mA 0.3 V
PG, LBO output leakage current V
(FB)
= V
O
nominal, V
(LBI)
= V
I
0.01 0.25 µA
Minimum supply voltage for valid power good, LBO
2.3 V
signal
V
(LBI)
Low battery input trip voltage Input voltage falling 1.21 V
Low battery input trip point accuracy 1.5%
V
(LBI,HY
Low battery input hysteresis 15 mV
S)
I
lkg(LBI)
LBI leakage current 0.01 0.1 µA
OSCILLATOR
f
S
Oscillator frequency 600 850 1000 kHz
f
(SYNC)
Synchronization range 600 1200 kHz
V
IH
SYNC high level input voltage 1.5 V
V
IL
SYNC low level input voltage 0.3 V
I
lkg
SYNC input leakage current SYNC = GND or VIN 0.01 0.1 µA
SYNC trip point hysteresis 100 mV
Duty cycle of external clock signal 20% 90%
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