MB39A136 datasheet(18/50 Pages) CYPRESS

Part #	MB39A136

Description	2ch PFM/PWM DC/DC Converter IC with Synchronous Rectification

PDF	50 Pages

Scroll/Zoom	100%

Manufacturer	CYPRESS [Cypress Semiconductor]

Direct Link	http://www.cypress.com

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18 / 50 page

MB39A136

Document Number: 002-08376 Rev. *A

Page 18 of 50

9. Protection Function Table

The following table shows the state of each pin when each protection function operates.

Note: x is the each channel number

Protection Function

Detection

condition

Output of each pin after detection

DC/DC output

dropping operation

VREF

DRVHx

DRVLx

Under Voltage Lock Out

Protection

(UVLO)

VB < 3.6 V

VREF < 2.7 V

< 2.7 V

< 3.6 V

Self-discharge by load

Under Voltage Protection

(UVP)

FBx < 0.49 V

3.3 V

5 V

Electrical discharge by soft-stop

function

Over Voltage Protection

(OVP)

FBx > 0.805 V

3.3 V

5 V

0 V clamping

Over Current Protection

(ILIM)

COMPx > ILIMx

3.3 V

switching

The output voltage is dropping to

keep constant output current.

Over Temperature

Protection

(OTP)

Tj >

 160°C

3.3 V

5 V

Electrical discharge by soft-stop

function

CONTROL

(CTL)

CTLx : H

→L

(CSx > 0.1 V)

3.3 V

5 V

MB39A136 Datasheet(PDF) 18 Page - Cypress Semiconductor

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