Datasheet

TPS62090, TPS62091
TPS62092, TPS62093
www.ti.com SLVSAW2A –MARCH 2012–REVISED MARCH 2012
ELECTRICAL CHARACTERISTICS
V
IN
= 3.6V, 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
V
IN
Input voltage range 2.5 6 V
I
QIN
Quiescent current Not switching, FB = FB +5 %, Into PVIN and AVIN 20 µA
I
sd
Shutdown current Into PVIN and AVIN 0.6 5 µA
Undervoltage lockout threshold V
IN
falling 2.1 2.2 2.3 V
UVLO
Undervoltage lockout hysteresis 200 mV
Thermal shutdown Temperature rising 150 ºC
Thermal shutdown hysteresis 20 ºC
Control SIGNALS EN, FREQ
V
H
High level input voltage V
IN
= 2.5 V to 6 V 1 V
V
L
Low level input voltage V
IN
= 2.5 V to 6 V 0.4 V
I
lkg
Input leakage current EN, FREQ = GND or V
IN
10 100 nA
R
PD
Pull down resistance 400 kΩ
Softstart
I
SS
Softstart current 6.3 7.5 8.7 µA
POWER GOOD
Output voltage rising 95%
V
th
Power good threshold
Output voltage falling 90%
V
L
Low level voltage I
(sink)
= 1mA 0.4 V
I
PG
PG sinking current 1 mA
I
lkg
Leakage current V
PG
= 3.6V 10 100 nA
POWER SWITCH
High side FET on-resistance I
SW
= 500 mA 50 mΩ
R
DS(on)
Low side FET on-resistance I
SW
= 500 mA 40 mΩ
High side FET switch current
I
LIM
3.7 4.6 5.5 A
limit
FREQ = GND, I
OUT
= 3 A 2.8 MHz
f
s
Switching frequency
FREQ = VIN, I
OUT
= 3 A 1.4 MHz
OUTPUT
V
s
Output voltage range 0.8 V
IN
V
R
od
Output discharge resistor EN = GND, V
OUT
= 1.8 V 200 Ω
V
FB
Feedback regulation voltage 0.8 V
V
IN
≥ V
OUT
+ 1 V, TPS62090 adjustable output version
I
OUT
= 1 A, PWM mode -1.4% +1.4%
Feedback voltage
V
FB
I
OUT
= 0 mA, FREQ = 2.8 MHz, V
OUT
≥ 0.8 V, PFM mode -1.4% +3%
accuracy
(1) (2)(3)
I
OUT
= 0 mA, FREQ = 1.4 MHz, V
OUT
≥ 1.2 V, PFM mode -1.4% +3%
I
OUT
= 0 mA, FREQ = 1.4 MHz, V
OUT
< 1.2V, PFM mode -1.4% +3.7%
I
FB
Feedback input bias current V
FB
= 0.8V, TPS62090 adjustable output version 10 100 nA
V
IN
≥ V
OUT
+ 1 V, Fixed output voltage
V
OUT
Output voltage accuracy
(2)(3)
I
OUT
= 1 A, PWM mode -1.4% +1.4%
OUT
= 0 mA, FREQ = High and Low, PFM mode -1.4% +2.5%
Line regulation V
OUT
= 1.8 V, PWM operation 0.016 %/V
Load regulation V
OUT
= 1.8 V, PWM operation 0.04 %/A
(1) For output voltages < 1.2 V, use a 2 x 22 µF output capacitance to achieve +3% output voltage accuracy.
(2) Conditions: f = 2.8 MHz, L = 0.47 µH, C
OUT
= 22 µF or f = 1.4 MHz, L = 1 µH, C
OUT
= 22 µF.
(3) For more information, see the Power Save Mode Operation section of this data sheet.
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Product Folder Link(s): TPS62090 TPS62091 TPS62092 TPS62093