Datasheet

TPS61175
SLVS892B –DECEMBER 2008–REVISED FEBRUARY 2012 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.
ABSOLUTE MAXIMUM RATINGS
(1)
over operating free-air temperature range (unless otherwise noted)
VALUE UNIT
Supply Voltages on pin VIN
(2)
–0.3 to 20 V
Voltages on pins EN
(2)
–0.3 to 20 V
Voltage on pin FB, FREQ and COMP
(2)
–0.3 to 3 V
Voltage on pin SYNC, SS
(2)
–0.3 to 7 V
Voltage on pin SW
(2)
–0.3 to 40 V
Continuous Power Dissipation See the Thermal Information Table
Operating Junction Temperature Range –40 to +150 °C
Storage Temperature Range –65 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.
THERMAL INFORMATION
TPS61175
THERMAL METRIC
(1)
UNITS
PWP 14 PINS
θ
JA
Junction-to-ambient thermal resistance 45.2
θ
JCtop
Junction-to-case (top) thermal resistance 34.9
θ
JB
Junction-to-board thermal resistance 30.1
°C/W
ψ
JT
Junction-to-top characterization parameter 1.5
ψ
JB
Junction-to-board characterization parameter 29.9
θ
JCbot
Junction-to-case (bottom) thermal resistance 5.8
(1) For more information about traditional and new thermal metrics, see the IC Package Thermal Metrics application report, SPRA953.
RECOMMENDED OPERATING CONDITIONS
over operating free-air temperature range (unless otherwise noted)
MIN NOM MAX UNIT
V
IN
Input voltage range 2.9 18 V
V
O
Output voltage range V
IN
38 V
L Inductor
(1)
4.7 47 μH
f
SW
Switching frequency 200 2200 kHz
C
I
Input Capacitor 4.7 μF
C
O
Output Capacitor 4.7 μF
V
SYN
External Switching Frequency Logic 5 V
T
A
Operating ambient temperature –40 85 °C
T
J
Operating junction temperature –40 125 °C
(1) The inductance value depends on the switching frequency and end application. While larger values may be used, values between 4.7-
μH and 47-μH have been successfully tested in various applications. Refer to the Inductor Selection for detail.
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