5

LM3555

www.ti.com

SNVS594G – DECEMBER 2008 – REVISED APRIL 2016

Product Folder Links: LM3555

Submit Documentation Feedback

Copyright © 2008–2016, Texas Instruments Incorporated

(1)

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

report, SPRA953.

6.4 Thermal Information

THERMAL METRIC(1)

LM3555

UNIT

YZR (DSBGA)

12 PINS

RθJA

Junction-to-ambient thermal resistance

92.9

°C/W

RθJC(top)

Junction-to-case (top) thermal resistance

0.6

°C/W

RθJB

Junction-to-board thermal resistance

16.1

°C/W

ψJT

Junction-to-top characterization parameter

2.8

°C/W

ψJB

Junction-to-board characterization parameter

16.1

°C/W

(1)

Minimum (MIN) and maximum (MAX) limits are specified by design, test, or statistical analysis. Typical (TYP) numbers are not specified,

but do represent the most likely norm. Unless otherwise specified, conditions for typical specifications are: VIN = 3.6 V and TA = 25°C.

(2)

Switching disabled.

6.5 Electrical Characteristics

Unless otherwise specified: typical limits are for TA = 25°C; minimum and maximum limits apply over the full operating

ambient temperature range (

−30°C ≤ TA ≤ +85°C); VIN = 3.6 V.

(1) (2)

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

CURRENT AND VOLTAGE SPECIFICATIONS

ILED-OUT

Flash LED accuracy

2.7 V

≤ VIN ≤ 5.5 V

VOUT = 6.5 V,

VLED = 6.2 V

50.7

(–15.5%)

60

67.2

(12%)

mA (%)

69.8

(–12.8%)

80

86.4

(8%)

304

(–5%)

320

336

(5%)

475

(–5%)

500

535

(7%)

IIND-OUT

Indicator LED current

accuracy

2.7 V

≤ VIN ≤ 5.5 V, VIND = 2 V (indicator mode)

–20.4%

2.5 mA

33.6%

–20.4%

5 mA

33.8%

–20.3%

7.5 mA

33.7%

–20.2%

10 mA

33.4%

VCSH

Current source

headroom voltage

2.7 V

≤ VIN ≤ 5.5 V

300

350

mV

VOVP

Overvoltage Protection

Range

2.7 V

≤ VIN ≤ 5.5 V

Trip point (rising)

9.22

9.5

9.96

V

Hysteresis

0.4

VOUT

Output voltage range

(VLED × NLED) + VCSH

Upper range

8.5

V

Lower range

2.8

ISD

Shutdown current

2.7 V

≤ VIN ≤ 5.5 V

0.75

µA

ISB

Standby current

2.7 V

≤ VIN ≤ 5.5 V

1.1

4.3

µA

IQ

Operating quiescent

current

2.7 V

≤ VIN ≤ 5.5 V, device switching

3.5

mA

VREF

Reference Voltage for

LED Detection

VIN = 3.6 V (No Offset)

4.35

V

VIND

Indicator Fault Voltages

IND OVP

2.571

V

IND Short

0.842

UVLO

Undervoltage lockout

Falling VIN

2.35

2.4

2.43

V

UVLOHYST

UVLO hysteresis

Rising VIN

60

70

85

mV