CS5112YDWF24 ONSEMI [ON Semiconductor], CS5112YDWF24 Datasheet

CS5112YDWF24

Manufacturer Part Number

CS5112YDWF24

Description

1.4 A Switching Regulator with 5.0 V, 100 mA Linear Regulator with Watchdog, RESET and ENABLE

Manufacturer

ONSEMI [ON Semiconductor]

Datasheet

1.CS5112YDWF24.pdf (13 pages)

Available stocks

Company

Part Number

Manufacturer

Quantity

Price

Company:

Bonase Electronics (HK) Co., Limited

Part Number:

CS5112YDWF24

Manufacturer:

ON Semiconductor

Quantity:

Current page: 1 of 13
Download datasheet (122Kb)

CS5112

1.4 A Switching Regulator

with 5.0 V, 100 mA Linear

Regulator with Watchdog,

RESET and ENABLE

contains a 5.0 V ± 2%, 100 mA linear regulator, a watchdog timer, a

linear output voltage monitor to provide a Power On Reset (POR) and a

1.4 A current mode PWM switching regulator.

reference, and supervisory functions. It has low internal supply current

consumption and provides 1.2 V (typical) dropout voltage at maximum

load current.

the microprocessor. It responds to the falling edge of this watchdog

signal. If a correct watchdog signal is not received within the externally

programmable time, a reset signal is issued.

for an output voltage (V

output voltage shifts below the regulation limit, RESET toggles low and

remains low for the duration of the delay after proper output voltage

regulation is restored. Additionally a reset pulse is issued if the correct

watchdog is not received within the programmed time. Reset pulses

continue until the correct watchdog signal is received. The reset pulse

width and frequency, as well as the Power On Reset delay, are set by one

external RC network.

amplifier with selectable feedback inputs, a current sense amplifier, an

adjustable oscillator, and a 1.4 A output power switch with

anti−saturation control. The switching regulator can be configured in a

variety of topologies.

includes current limit on the linear and switcher outputs, and an

overtemperature limiter.

Features

•

*For additional information on our Pb−Free strategy and soldering details, please

October, 2005 − Rev. 7

download the ON Semiconductor Soldering and Mounting Techniques

Reference Manual, SOLDERRM/D.

The CS5112 is a dual output power supply integrated circuit. It

The 5.0 V linear regulator is comprised of an error amplifier,

The watchdog timer circuitry monitors an input signal (WDI) from

The externally programmable active reset circuit operates correctly

The current mode PWM switching regulator is comprised of an error

The CS5112 is load dump capable and has protection circuitry which

Linear Regulator

Switching Regulator

Smart Functions

Protection

Internally Fused Leads in a SOIC Package

Pb−Free Packages are Available*

♦

5.0 V ± 2% @ 100 mA

1.4 A Peak Internal Switch

120 kHz Maximum Switching Frequency

5.0 V to 26 V Operating Supply Range

Watchdog

RESET

ENABLE

Overtemperature

Current Limit

LIN

) as low as 1.0 V. During power up, or if the

†For information on tape and reel specifications,

CS5112YDWF24

CS5112YDWF24G

CS5112YDWFR24

CS5112YDWFR24G SOIC−24

including part orientation and tape sizes, please

refer to our Tape and Reel Packaging Specifications

Brochure, BRD8011/D.

Device

SELECT

ORDERING INFORMATION

COMP

CS5112 = Device Code

GND

MARKING DIAGRAM

PIN CONNECTIONS

FB1

FB2

http://onsemi.com

= Assembly Location

= Wafer Lot

= Year

= Work Week

= Pb−Free Package

AWLYYWWG

(Pb−Free)

SOIC−24

SOIC−24 1000/Tape & Reel

Package

CS5112

Publication Order Number:

DWF SUFFIX

CASE 751E

ENABLE

GND

RESET

WDI

SOIC−24

BIAS

1000/Tape & Reel

REG

LIN

Delay

OSC

30 Units/Rail

Shipping

CS5112/D

†

Related parts for CS5112YDWF24

CS5112YDWF24 Summary of contents

Page 1

... V FB2 SELECT COMP ORDERING INFORMATION Device Package CS5112YDWF24 SOIC−24 CS5112YDWF24G SOIC−24 (Pb−Free) CS5112YDWFR24 SOIC−24 1000/Tape & Reel CS5112YDWFR24G SOIC−24 (Pb−Free) †For information on tape and reel specifications, including part orientation and tape sizes, please refer to our Tape and Reel Packaging Specifications Brochure, BRD8011/D ...

Page 2

V FB1 Multiplexer V FB2 SELECT COMP I BIAS Oscillator C OSC V REG Bandgap Reference C DELAY WDI MAXIMUM RATINGS Logic Inputs/Outputs (ENABLE, SELECT, WDI, RESET) V LIN REG: V Peak Transient Voltage SW C ...

Page 3

V ≤ V ELECTRICAL CHARACTERISTICS = 0.1 mF; unless otherwise specified 64.9 kW 390 pF, C BIAS OSC COMP Characteristic General 6.6 V ≤ Off Current IN 6.6 V ≤ ...

Page 4

ELECTRICAL CHARACTERISTICS = 0.1 mF; unless otherwise specified 64.9 kW 390 pF, C BIAS OSC COMP Characteristic Switcher Section (continued) = 5.0 V with 50 W Load, V Switcher Max Duty Cycle V SW Current Sense ...

Page 5

TYPICAL PERFORMANCE CHARACTERISTICS 4.5 4.0 3 (mA) LIN Figure 2. 5.0 V Regulator Bias Current vs. Load Current 1.4 1.2 1.0 0.8 0.6 0.4 0 0.5 1.0 I (A) SW Figure 4. Switch ...

Page 6

V REG I Bandgap BIAS Reference R BIAS 64 Delay WDI Figure 6. Block Diagram of 5.0 V Linear Regulator Portion of the CS5112 5.0 V LINEAR REGULATOR The 5.0 V linear regulator consists of an error amplifier, ...

Page 7

Duty V REG Cycle RESET WDI V LIN t POR A: Watchdog waiting for low−going transition on WDI B: RESET stays low for t time WDI Figure 8. Timing Diagram When WDI Fails to Appear Within the Preset Time ...

Page 8

V LIN COMP I BIAS R BIAS 64 OSC Oscillator Switcher Error COMP Amplifier Figure 11. Block Diagram of the 1.4 A Current Mode Control Switching Regulator Portion of the OUT SAT ...

Page 9

DESIGN PROCEDURE FOR BOOST TOPOLOGY This section outlines a procedure for designing a boost switching power supply operating in the discontinuous mode. Step 1 Determine the output power required by the load. P OUT + I OUT V OUT Step ...

Page 10

The V /V transfer function has a pole at: OUT (pR LOAD C OUT ) and a zero due to the output capacitor’s ESR at (2pESR(C OUT )) Since the error ...

Page 11

Select > 2.0 V OUT Select < 0.8 V OUT OUT ( 100 (1) 946 ...

Page 12

LINEAR REGULATOR OUTPUT CURRENT VS. INPUT VOLTAGE 100 55°C Max Total Power = 1. (V) REG Figure 17. The Shaded Area Shows ...

Page 13

D 24X 0.010 (0.25 −T− SEATING PLANE G 22X PACKAGE THERMAL DATA R qJC R qJA ON Semiconductor and are registered trademarks of Semiconductor Components Industries, LLC (SCILLC). SCILLC reserves the right to ...

Related keywords

CS5112YDWF24 datasheet
CS5112YDWF24 data sheet
CS5112YDWF24 pdf datasheet
CS5112YDWF24 component
CS5112YDWF24 part
CS5112YDWF24 distributor
CS5112YDWF24 RoHS
CS5112YDWF24 datasheet download