Datasheet

TPS61253, TPS61254, TPS61256
TPS61258, TPS61259
www.ti.com SLVSAG8C –SEPTEMBER 2011–REVISED AUGUST 2012
ELECTRICAL CHARACTERISTICS (continued)
Minimum and maximum values are at V
IN
= 2.3V to 5.5V, V
OUT
= 4.5V (or V
IN
, whichever is higher), EN = 1.8V, T
A
= –40°C to
85°C; Circuit of Parameter Measurement Information section (unless otherwise noted). Typical values are at V
IN
= 3.6V, V
OUT
= 4.5V, EN = 1.8V, T
A
= 25°C (unless otherwise noted).
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
POWER SWITCH
High-side MOSFET on resistance 170
r
DS(on)
TPS6125x mΩ
Low-side MOSFET on resistance 100
Reverse leakage current into
I
lkg
TPS6125x EN = GND, BP = GND 3.5 µA
VOUT
TPS61253
EN = V
IN
, BP = GND. Open Loop 3300 3620 3900
TPS61258
TPS61259
Switch valley current limit mA
TPS61254
I
LIM
TPS61256 EN = V
IN
, BP = GND. Open Loop 1900 2150 2400
TPS61257
Pre-charge mode current limit
TPS6125x EN = GND, BP = V
IN
165 215 265 mA
(linear mode)
Overtemperature protection 140 °C
TPS6125x
Overtemperature hysteresis 20 °C
OSCILLATOR
f
OSC
Oscillator frequency TPS6125x V
IN
= 3.6V V
OUT
= 4.5V 3.5 MHz
TIMING
BP = GND, I
OUT
= 0mA.
TPS6125x 70 µs
Time from active EN to start switching
TPS61253
Start-up time
TPS61254
BP = GND, I
OUT
= 0mA.
TPS61256
400 µs
Time from active EN to V
OUT
TPS61258
TPS61259
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