LSP5523

Document number: DS44073 Rev. 7 - 2

5 of 17

www.diodes.com

May 2022

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LSP5523

Electrical Characteristics

(TA=25°C, unless otherwise specified)

Characteristics

Symbol

Conditions

Min

Typ

Max

Unit

Feedback Voltage

VFB

4.5V ≤ VIN ≤ 27V

0.900

0.925

0.950

V

Feedback Overvoltage Threshold

—

—

—

1.1

—

V

High-Side Switch-On Resistance*

—

—

—

90

—

mΩ

Low-Side Switch-On Resistance*

—

—

—

70

—

mΩ

High-Side Switch Leakage

—

VEN = 0V, VSW = 0V

—

0.1

10

uA

Upper Switch Current Limit

—

Minimum Duty Cycle

3.8

4.5

—

A

Lower Switch Current Limit

—

From Drain to Source

—

1.2

—

A

COMP to Current SenseLimit

Transconductance

GCS

—

—

5.2

—

A/V

Error Amplifier Transconductance

GEA

ΔI

COMP = ±10uA

—

900

—

uA/V

Error Amplifier DC Gain*

AVEA

—

—

400

—

V/V

Switching Frequency

fSW

—

300

340

380

KHz

Short Circuit Switching Frequency

—

VFB = 0

—

100

—

KHz

Minimum Duty Cycle*

Dmin

—

7.5

—

—

%

Maximum Duty Cycle

Dmax

—

—

92

—

%

EN Shutdown Threshold Voltage

—

VEN Rising

1.1

1.4

2

V

EN Shutdown Threshold Voltage

Hysteresis

—

—

—

180

—

mV

EN Lockout Threshold Voltage

—

—

2.2

2.5

2.7

V

EN Lockout Hysteresis

—

—

—

150

—

mV

Supply Current in Shutdown

—

VEN = 0

—

0.3

3.0

uA

IC Supply Current in Operation

—

VEN = 3V, VFB = 1.0V

—

1.3

1.5

mA

Input UVLO Threshold Rising

UVLO

VEN Rising

3.8

4.0

4.5

V

Input UVLO Threshold Hysteresis

—

—

—

150

—

mV

Soft-start Current

—

VSS = 0V

—

6

—

uA

Soft-start Period

—

CSS = 0.1uF

—

13

—

mS

Thermal Shutdown Temperature*

—

Hysteresis =25°C

—

155

—

°C

Note : * Guaranteed by design, not tested.