TPS61085

SLVS859B – JUNE 2008 – REVISED DECEMBER 2014

www.ti.com

7.3 Recommended Operating Conditions

MIN

TYP

MAX

UNIT

Input voltage range

2.3

6

V

Boost output voltage range

18.5

V

Operating free-air temperature

–40

85

°C

Operating junction temperature

–40

125

°C

7.4 Thermal Information

TPS61085

DGK

PW

UNIT

8 PINS

8 PINS

Junction-to-ambient thermal resistance

189.3

183.3

Junction-to-case (top) thermal resistance

57.1

66.7

Junction-to-board thermal resistance

109.9

112.0

°C/W

Junction-to-top characterization parameter

3.5

8.3

Junction-to-board characterization parameter

108.3

110.3

(1)

For more information about traditional and new thermal metrics, see the IC Package Thermal Metrics application report, SPRA953.

7.5 Electrical Characteristics

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

SUPPLY

Input voltage range

2.3

6

V

Operating quiescent current into IN

70

100

μA

Shutdown current into IN

EN = GND

1

μA

UVLO

Undervoltage lockout threshold

2.2

V

2.3

V

Thermal shutdown

Temperature rising

150

°C

Thermal shutdown hysteresis

14

°C

LOGIC SIGNALS EN, FREQ

High level input voltage

2

V

Low level input voltage

0.5

V

Input leakage current

EN = FREQ = GND

0.1

μA

BOOST CONVERTER

Boost output voltage

18.5

V

0.5

Feedback regulation voltage

1.230

1.238

1.246

V

gm

Transconductance error amplifier

107

μA/V

Feedback input bias current

0.1

μA

N-channel MOSFET on-resistance

0.13

0.20

Ω

0.15

0.24

SW leakage current

10

µA

N-Channel MOSFET current limit

2.0

2.6

3.2

A

Soft-start current

7

10

13

μA

Oscillator frequency

0.9

1.2

1.5

MHz

FREQ = GND

480

650

820

kHz

Line regulation

0.0002

%/V

Load regulation

0.11

%/A

4

Submit Documentation Feedback

Copyright © 2008–2014, Texas Instruments Incorporated

Product Folder Links: TPS61085