Datasheet

TPS61087
www.ti.com SLVS821C –MAY 2008–REVISED JULY 2013
ELECTRICAL CHARACTERISTICS
V
IN
= 5 V, EN = V
IN
, V
S
= 15 V, 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
Q
Operating quiescent current into IN Device not switching, V
FB
= 1.3 V 75 100 μA
I
SDVIN
Shutdown current into IN EN = GND 1 μA
V
UVLO
Under-voltage lockout threshold V
IN
falling 2.4 V
V
IN
rising 2.5 V
T
SD
Thermal shutdown Temperature rising 150 °C
T
SDHYS
Thermal shutdown hysteresis 14 °C
LOGIC SIGNALS EN, FREQ
V
IN
= 2.5 V to 6.0 V 2
V
IH
High level input voltage V
only valid for EN, V
IN
= 2.5 V to 4.3 V 1.6
V
IL
Low level input voltage V
IN
= 2.5 V to 6.0 V 0.5 V
I
INLEAK
Input leakage current EN = FREQ = GND 0.1 μA
BOOST CONVERTER
V
IN
+
V
S
Boost output voltage 18.5 V
0.5
V
FB
Feedback regulation voltage 1.230 1.238 1.246 V
gm Transconductance error amplifier 107 μA/V
I
FB
Feedback input bias current V
FB
= 1.238 V 0.1 μA
V
IN
= V
GS
= 5 V, I
SW
= current limit 0.13 0.18
r
DS(on)
N-channel MOSFET on-resistance Ω
V
IN
= V
GS
= 3V, I
SW
= current limit 0.16 0.23
I
SWLEAK
SW leakage current EN = GND, V
SW
= V
IN
= 6.0V 2 μA
I
LIM
N-Channel MOSFET current limit 3.2 4.0 4.8 A
I
SS
Soft-start current V
SS
= 1.238 V 7 10 13 μA
FREQ = V
IN
0.9 1.2 1.5 MHz
f
S
Oscillator frequency
FREQ = GND 480 650 820 kHz
Line regulation V
IN
= 2.5 V to 6.0 V, I
OUT
= 10 mA 0.0002 %/V
Load regulation V
IN
= 5.0 V, I
OUT
= 1 mA to 1 A 0.11 %/A
Copyright © 2008–2013, Texas Instruments Incorporated Submit Documentation Feedback 3
Product Folder Links: TPS61087