Texas Instruments TPS61040, Manual

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TPS61040
TPS61041
www.ti.com SLVS413F – OCTOBER 2002 – REVISED DECEMBER 2010
RECOMMENDED OPERATING CONDITIONS
MIN TYP MAX UNIT
V
IN
Input voltage range 1.8 6 V
V
OUT
Output voltage range 28 V
L Inductor
(1)
2.2 10 m H
f Switching frequency
(1)
1 MHz
C
IN
Input capacitor
(1)
4.7 m F
C
OUT
Output capacitor
(1)
1
m
F
T
A
Operating ambient temperature –40 85 °C
T
J
Operating junction temperature –40 125 °C
(1) See application section for further information.
ELECTRICAL CHARACTERISTICS
V
IN
= 2.4 V, EN = V
IN
, 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 1.8 6 V
I
Q
Operating quiescent current I
OUT
= 0 mA, not switching, V
FB
= 1.3 V 28 50 m A
I
SD
Shutdown current EN = GND 0.1 1 m A
V
UVLO
Under-voltage lockout threshold 1.5 1.7 V
ENABLE
V
IH
EN high level input voltage 1.3 V
V
IL
EN low level input voltage 0.4 V
I
I
EN input leakage current EN = GND or V
IN
0.1 1 m A
POWER SWITCH AND CURRENT LIMIT
Vsw Maximum switch voltage 30 V
t
off
Minimum off time 250 400 550 ns
t
on
Maximum on time 4 6 7.5 m s
R
DS(on)
MOSFET on-resistance V
IN
= 2.4 V; I
SW
= 200 mA; TPS61040 600 1000 m
Ω
R
DS(on)
MOSFET on-resistance V
IN
= 2.4 V; I
SW
= 200 mA; TPS61041 750 1250 m Ω
MOSFET leakage current V
SW
= 28 V 1 10 m A
I
LIM
MOSFET current limit TPS61040 350 400 450 mA
I
LIM
MOSFET current limit TPS61041 215 250 285 mA
OUTPUT
V
OUT
Adjustable output voltage range V
IN
28 V
V
ref
Internal voltage reference 1.233 V
I
FB
Feedback input bias current V
FB
= 1.3 V 1 m A
V
FB
Feedback trip point voltage 1.8 V ≤ V
IN
≤ 6 V 1.208 1.233 1.258 V
1.8 V
≤
V
IN
≤
6 V; V
OUT
= 18 V; I
load
= 10 mA;
Line regulation
(1)
0.05 %/V
C
FF
= not connected
Load regulation
(1)
V
IN
= 2.4 V; V
OUT
= 18 V; 0 mA ≤ I
OUT
≤ 30 mA 0.15 %/mA
(1) The line and load regulation depend on the external component selection. See the application section for further information.
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