LMZ22005 datasheet(5/34 Pages) TI

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LMZ22005

www.ti.com

SNVS686J – MARCH 2011 – REVISED AUGUST 2015

6.5 Electrical Characteristics

Minimum and Maximum limits are ensured 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.

PARAMETER

TEST CONDITIONS

MIN(1)

TYP(2)

MAX(1)

UNIT

SYSTEM PARAMETERS

ENABLE CONTROL

VEN rising, TJ = 25°C

1.279

VEN

EN threshold trip point

VEN rising, TJ = –40°C to +125°C

1.1

1.458

VEN-HYS

EN input hysteresis current

VEN > 1.279 V

µA

SOFT-START

VSS = 0 V, TJ = 25°C

ISS

SS source current

µA

VSS = 0 V, TJ = –40°C to +125°C

tSS

Internal soft-start interval

1.6

CURRENT LIMIT

ICL

Current limit threshold

DC average, TJ = –40°C to +125°C

5.4

INTERNAL SWITCHING OSCILLATOR

Free-running oscillator

fosc

Sync input connected to ground.

711

812

914

kHz

frequency

fsync

Synchronization range

650

950

kHz

Synchronization logic zero

VIL-sync

Relative to AGND, TJ = –40°C to +125°C

0.4

amplitude

Synchronization logic one

VIH-sync

Relative to AGND, TJ = –40°C to +125°C

1.5

amplitude

Synchronization duty cycle

Sync dc

15%

50%

85%

range

Dmax

Maximum Duty Factor

83%

REGULATION AND OVERVOLTAGE COMPARATOR

VSS >+ 0.8 V, IO = 3 A, TJ = 25°C

0.796

VFB

In-regulation feedback voltage

VSS >+ 0.8 V, IO = 3 A,

0.776

0.816

TJ = –40°C to +125°C

Feedback overvoltage

VFB-OV

0.86

protection threshold

IFB

Feedback input bias current

Non-switching input current

VFB = 0.86 V

2.6

ISD

Shutdown quiescent current

VEN = 0 V

μA

THERMAL CHARACTERISTICS

TSD

Thermal shutdown

Rising

165

°C

TSD-HYST

Thermal shutdown hysteresis

Falling

°C

PERFORMANCE PARAMETERS(3)

Cout = 220 µF with 7 mΩ ESR + 100 µF

ΔVO

Output voltage ripple

mVPP

X7R + 2 x 0.047 µF BW at 20 MHz

ΔVO/ΔVIN

Line regulation

VIN = 12 V to 20 V, IO= 0.001 A

±0.02%

ΔVO/ΔIOUT

Load regulation

VIN = 12 V, IO= 0.001 A to 3 A

mV/A

Peak efficiency

VIN = 12 V, VO = 3.3 V, IO = 1 A

86%

Full load efficiency

VIN = 12 V VO = 3.3 V, IO = 3 A

81.5%

(1)

Min and Max limits are 100% production tested at 25°C. Limits over the operating temperature range are ensured through correlation

using Statistical Quality Control (SQC) methods. Limits are used to calculate Average Outgoing Quality Level (AOQL).

(2)

Typical numbers are at 25°C and represent the most likely parametric norm.

(3)

Refer to BOM in Table 1.

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