LM73606 datasheet(6/53 Pages) TI1

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LM73605, LM73606

SNVSAH5 – SEPTEMBER 2017

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Product Folder Links: LM73605 LM73606

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(1)

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

report.

6.4 Thermal Information

THERMAL METRIC(1)

LM73605/LM73606

UNIT

RNP (WQFN)

30 PINS

RθJA

Junction-to-ambient thermal resistance

34.3

°C/W

RθJC(top)

Junction-to-case (top) thermal resistance

14.6

°C/W

RθJB

Junction-to-board thermal resistance

7.3

°C/W

ψJT

Junction-to-top characterization parameter

0.1

°C/W

ψJB

Junction-to-board characterization parameter

7.1

°C/W

RθJC(bot)

Junction-to-case (bottom) thermal resistance

°C/W

(1)

Shutdown current includes leakage current of the switching transistors.

6.5 Electrical Characteristics

Limits apply over the recommended operating junction temperature (TJ) range of –40°C to +125°C, unless otherwise stated.

Minimum and maximum limits are specified through test, design or statistical correlation. Typical values represent the most

likely parametric norm at TJ = 25°C, and are provided for reference purposes only. Unless otherwise stated, the following

conditions apply: VIN = 12 V, VOUT = 3.3 V, fSW = 500 kHz.

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

SUPPLY VOLTAGE (PVIN PINS)

VIN

Operating input voltage

range

3.5

ISD

Shutdown quiescent current;

measured at VIN pin(1)

VEN = 0 V

TJ = 25℃

0.8

µA

IQ_NONSW

Operating quiescent current

from VIN (non-switching)

VEN = 2 V, VFB = 1.5 V, VBIAS = 3.3 V

external

0.6

µA

ENABLE (EN PIN)

VEN_VCC_H

Enable input high level for

VCC output

VEN rising

1.15

VEN_VCC_L

Enable input low level for

VCC output

VEN falling

0.3

VEN_VOUT_H

Enable input high level for

VOUT

VEN rising

1.14

1.196

1.25

VEN_VOUT_HYS

Enable input hysteresis for

VOUT

VEN falling hysteresis

–100

ILKG_EN

Enable input leakage current

VEN = 2 V

1.4

200

INTERNAL LDO (VCC PIN, BIAS PIN)

VCC

Internal VCC voltage

PWM operation

3.27

PFM operation

3.1

VCC_UVLO

Internal VCC undervoltage

lockout

VCC rising

2.96

3.14

3.27

VCC falling hysteresis

–605

VBIAS_ON

Input changeover

VBIAS rising

3.09

3.25

VBIAS falling hysteresis

–63

IBIAS_NONSW

Operating quiescent current

from external VBIAS (non-

switching)

VEN = 2 V, VFB = 1.5 V, VBIAS = 3.3 V

external

µA

VOLTAGE REFERENCE (FB PIN)

VFB

Feedback voltage

PWM mode

0.987

1.006

1.017

ILKG_FB

Input leakage current at FB

VFB = 1 V

0.2

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