Datasheet

TPS55010
www.ti.com SLVSAV0A –APRIL 2011–REVISED JUNE 2011
ELECTRICAL CHARACTERISTICS
T
J
= –40°C TO 150°C, VIN = 2.95V TO 6V (unless otherwise noted)
DESCRIPTION CONDITIONS MIN TYP MAX UNIT
SUPPLY VOLTAGE
Operating input voltage VIN 2.95 6 V
Shutdown current EN = 0V, 25°C 2 5 µA
Operating current VSENSE = 0.9V, 25°C 360 575 µA
Internal undervoltage lockout 2.6 2.9 V
ENABLE
rising 1.25 1.37 V
Enable threshold
falling 1.15 1.18
Threshold - 50mV -1.2 µA
Input current
Threshold + 50mV -4.6
µA
Hysteresis 3.4
VOLTAGE REFERENCE
Reference 3V < VIN < 6V 0.804 0.829 0.854 V
MOSFET
High side switch resistance BOOT- PH = 5 V 45 81 mΩ
Low side switch resistance VIN = 5 V 45 81 mΩ
ERROR AMPLIFIER
Input current 50 nA
Error amp transconductance -2 µA < I
(COMP)
< 2 µA 245 uMhos
Error amp dc gain VSENSE = 0.8 V 500 V/V
Minimum unity gain Bandwidth 3 MHz
Error amp source/sink V
(COMP)
= 1V, 100 mV overdrive ±16 µA
COMP to Iph gm Iph = 0.5 A 7.5 A/V
CURRENT LIMIT
High side sourcing current limit VIN = 3 V 2 2.75 A
Low Side Sinking Current Limit VIN = 3 V -3 -4.5 A
THERMAL SHUTDOWN
Thermal Shutdown 171 °C
OT Hysteresis 12 °C
RT/CLK
Switching frequency using RT mode 100 2000 kHz
Switching Frequency R
(RT/CLK)
= 195 kΩ 400 500 600 kHz
RT/CLK voltage R
(RT/CLK)
= 195 kΩ 0.5 V
RT/CLK high threshold 1.6 2.2 V
RT/CLK low threshold 0.4 0.6 V
Switching frequency using CLK mode 300 2000 kHz
Minimum CLK pulse width 75 ns
PLL lock in time 50 µs
RT/CLK falling edge to PH rising edge 90 ns
delay
PH
Minimum On time Measured at 10% to 10% of VIN 130 ns
BOOT
Boot UVLO 2.5 V
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