Datasheet

TPS61045
SLVS440B –JANUARY 2003–REVISED MARCH 2009 www.ti.com
These devices have limited built-in ESD protection. The leads should be shorted together or the device placed in conductive foam
during storage or handling to prevent electrostatic damage to the MOS gates.
ORDERING INFORMATION
(1)
T
A
8 Pin QFN Package (DRB) Package Marking
–40°C to 85°C TPS61045DRB BHT
(1) The DRB package is available taped and reeled. Add R suffix (TPS61045DRBR) to order quantities of 3000 units per reel. Add T suffix
(TPS61045DBRT) to order quantifies of 250 units per reel.
ABSOLUTE MAXIMUM RATINGS
over operating free-air temperature range (unless otherwise noted)
(1)
TPS61045
Supply voltage, V
VIN
(2)
–0.3 V to 7 V
Voltages, V
CTRL
, V
(FB)
, V
L
, V
DO
(2)
–0.3 V to V
IN
+ 0.3 V
Voltage, V
SW
(2)
30 V
Continuous power dissipation See Dissipation Rating Table
Operating junction temperature range –40° C to 150° C
Storage temperature range, T
STG
–65° C to 150° C
(1) Stresses beyond those listed under absolute maximum ratings may cause permanent damage to the device. These are stress ratings
only, and functional operation of the device at these or any other conditions beyond those indicated under recommended operating
conditions is not implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.
(2) All voltage values are with respect to network ground terminal.
DISSIPATION RATING
DERATING FACTOR
T
A
≤ 25°C POWER T
A
= 70°C POWER T
A
= 85°C POWER
PACKAGE ABOVE
RATING RATING RATING
T
A
= 25°C
8 pin QFN (DRB)
(1)
370 mW 3.7 mW/°C 204 mW 148 mW
(1) The thermal resistance junction to ambient of the 8 pin QFN package is 270°C/W. Standard 2 layer PCB without vias for the thermal
pad. See the application section on how to improve the thermal resistance R
ΘJA
.
RECOMMENDED OPERATING CONDITIONS
MIN TYP MAX UNIT
V
VIN
Input voltage range 1.8 6 V
V
SW
Switch voltage 30 V
L Inductor
(1)
4.7 mH
f Switching frequency
(1)
1 MHz
C
I(C2)
Input capacitor (C2)
(1)
4.7 mF
C
O(C3)
Output capacitor (C3)
(1)
1 mF
T
A
Operating ambient temperature –40 85 °C
T
J
Operating junction temperature –40 125 °C
(1) See application section for further information.
2 Submit Documentation Feedback Copyright © 2003–2009, Texas Instruments Incorporated
Product Folder Link(s): TPS61045