Datasheet

TPS61093
www.ti.com SLVS992A –SEPTEMBER 2009–REVISED NOVEMBER 2009
ELECTRICAL CHARACTERISTICS
VIN = 3.6 V, EN = VIN, T
A
= –40°C to 85°C, typical values are at T
A
= 25°C (unless otherwise noted)
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
SUPPLY CURRENT
V
IN
Input voltage range, VIN 1.6 6 V
I
Q
Operating quiescent current into VIN Device PWM switching no load 0.9 1.5 mA
I
SD
Shutdown current EN = GND, VIN = 6 V 1 μA
UVLO Undervoltage lockout threshold VIN falling 1.5 1.55 V
V
hys
Undervoltage lockout hysterisis 50 mV
ENABLE AND PWM CONTROL
V
ENH
EN logic high voltage VIN = 1.6 V to 6 V 1.2 V
V
ENL
EN logic low voltage VIN = 1.6 V to 6 V 0.3 V
R
EN
EN pull down resistor 400 800 1600 kΩ
T
off
EN pulse width to shutdown EN high to low 1 ms
VOLTAGE CONTROL
V
REF
Voltage feedback regulation voltage 0.49 0.5 0.51 V
I
FB
Voltage feedback input bias current 100 nA
f
S
Oscillator frequency 1.0 1.2 1.4 MHz
D
max
Maximum duty cycle V
FB
= 0.1 V, T
A
= 85°C 90% 93%
T
min_on
Minimum on pulse width 65 ns
POWER SWITCH, ISOLATION FET
R
DS(ON)N
N-channel MOSFET on-resistance VIN = 3 V 0.25 0.4 Ω
R
DS(ON)iso
Isolation FET on-resistance VO = 5 V 2.5 4 Ω
VO = 3.5 V 4.5
I
LN_N
N-channel leakage current V
DS
= 20 V, T
A
= 25°C 1 μA
I
LN_iso
Isolation FET leakage current V
DS
= 20 V, T
A
= 25°C 1 μA
V
F
Power diode forward voltage Current = 500 mA 0.8 V
OC, ILIM, OVP SC AND SS
I
LIM
N-Channel MOSFET current limit 0.9 1.1 1.5 A
V
ovp
Over voltage protection threshold Measured on the VO pin 18 19 V
V
ovp_hys
Over voltage protection hysteresis 0.6 V
I
OL
Over load protection 200 300 mA
THERMAL SHUTDOWN
T
shutdown
Thermal shutdown threshold 150 °C
T
hysteresis
Thermal shutdown hysteresis 15 °C
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