LMZ20502

SNVS852C – JUNE 2012 – REVISED APRIL 2015

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7.5 Electrical Characteristics

Limits apply over the recommended operating junction temperature range of –40°C to 125°C, unless otherwise noted.

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

PARAMETER

TEST CONDITIONS

TYP

UNIT

Feedback voltage

0.594

0.6

0.606

V

Operating quiescent current in

72

90

µA

AUTO mode

Operating quiescent current in

490

620

µA

forced PWM mode

0.7

1.5

µA

1.0

2.4

Input supply under-voltage

Rising

2.5

V

lock-out thresholds

Falling

2.3

High Level Input Voltage

1.4

V

Low Level Input Voltage

0.4

High Level Input Voltage

1.2

V

Low Level Input Voltage

0.4

2.1

2.7

A

Internal oscillator frequency

2.5

3.0

3.2

MHz

50

ns

800

µs

Power good flag pull-down

40

70

110

Ω

Power good flag, under-

% of feedback voltage, rising

92%

Power good flag, under-

% of feedback voltage, falling

88%

Power good flag, over-voltage

% of feedback voltage, rising

112%

Power good flag, over-voltage

% of feedback voltage, falling

108%

Rising threshold

159

°C

Thermal shutdown

15

°C

(1)

MIN and MAX limits are 100% production tested at 25°C. Limits over the operating temperature range are verified through correlation

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

(2)

Shutdown current includes leakage current of the switching transistors.

(3)

This is the peak switch current limit measured with a slow current ramp. Due to inherent delays in the current limit comparator, the peak

current limit measured at 3MHz will be larger.

(4)

This parameter is not tested in production.

(5)

See Power Good Flag Function for explanation of voltage levels.

6

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