XCM524AD05DR-G datasheet, PDF - EEWORLD Datasheet

XCM524

Series

600mA Synchronous Step-Down DC/DC Converter + 500mA LDO

with Delay Function Voltage Detector

ETR2428-003

■GENERAL

DESCRIPTION

The XCM524 series is a multi combination module IC which comprises of a 600mA driver transistor built-in synchronous

step–down DC/DC converter and a high speed, high current LDO regulator with voltage detector function. The device is

housed in small USP-12B01 package which is ideally suited for space conscious applications. The DC/DC converter and the

LDO blocks are isolated in the package so that noise interference from the DC/DC to the LDO regulator is minimal.

The DC/DC converter block with a built-in 0.42ΩP-channel MOS driver transistor and 0.52ΩN-channel MOS switching

transistor, designed to allow the use of ceramic capacitors. The DC/DC enables a high efficiency, stable power supply with an

output current of 600mA to be configured using only a coil and two capacitors connected externally.

The LDO regulator block is precise, low noise, high ripple rejection, low dropout positive voltage regulators with built-in voltage

detector. The LDO is also compatible with low ESR ceramic output capacitors. Good output stability is maintained during

load fluctuations due to its excellent transient response. The current limiter's fold back circuit also operates as a short circuit

protection for the output current.

The voltage detector block of the contains delay circuit. The delay time can be controlled by an external capacitor.

The detector monitors the input voltage of the voltage regulator.

■APPLICATIONS

●BD,

DVD drives

●HDD

drives

●Cameras,

Video recorders

●Mobile

phones, Smart phones

●Various

general-purpose power supplies

■FEATURES

Input Voltage Range

: 2.7V ~ 6.0V

Output Voltage Options

: 0.8V ~ 4.0V (±2％)

High Efficiency

: 92% (TYP.)

Output Current

: 600mA (MAX.)

Oscillation Frequency

: 1.2MHz, 3.0MHz (+15%)

Current Limiter Circuit Built-In : Constant Current & Latching

Control Methods

: PWM

PWM/PFM Auto

*Performance depends on external components and wiring on PCB wiring.

Maximum Output Current

■

TYPICAL APPLICATION CIRCUIT

: 500mA (Limiter 600mA TYP.)

(2.5V≦V

ROUT

≦4.9V)

Dropout Voltage

: 200mV@I

ROUT

=100mA (TYP.)

Operating Voltage Range

: 2.0V ~ 6.0V

Output Voltage Options

: 0.9V ~ 5.1V (0.1V increments, ±2％)

Detect Voltage Options

: 2.0V ~ 5.5V (0.1V increments, ±2％)

VR.VD Temperature Stability :±100ppm/℃ (TYP.)

High Ripple Rejection

: 65dB (@10kHz)

Low ESR Capacitor

: Ceramic Capacitor

Operating Temperature Range

: -40℃ ~ +85℃

Package

: USP-12B01

Environmentally Friendly

: EU RoHS Compliant, Pb Free

(TOP VIEW)

1/52

XCM524

Series

■PIN

CONFIGURATIOIN

PIN No

1

2

3

4

5

6

7

8

(TOP VIEW)

9

10

11

12

XCM524

V

DOUT

V

SS

Cd

V

IN2

PGND

Lx

DCOUT

AGND

EN2

V

IN1

NC

V

ROUT

VDR

V

DOUT

V

SS

Cd

-

V

IN1

-

V

ROUT

DC/DC

-

V

IN

PGND

Lx

VOUT

AGND

CE

-

(BOTTOM VIEW)

*DC/DC Ground pin (No.5 and 8) should be short before using the IC.

* A dissipation pad on the reverse side of the package should be electrically isolated.

*1: Voltage level of the VDR’s dissipation pad should be V

SS

level.

*2: Voltage level of the DC/DC’s dissipation pad should be V

SS

level.

Care must be taken for an electrical potential of each dissipation pad so as to enhance mounting strength and heat release

when the pad needs to be connected to the circuit.

■PIN

ASSIGNMENT

PIN No

1

2

3

4

5

6

7

8

9

10

11

12

XCM524

VDOUT

V

SS

Cd

V

IN2

PGND

Lx

DCOUT

AGND

EN2

V

IN1

NC

V

ROUT

FUNCTIONS

VDR Block: VD Output Voltage

VDR Block: Ground

VDR Block: Delay Capacitor connection

DC/DC Block: Power Input

DC/DC Block: Power Ground

DC/DC Block: Switching Connection

DC/DC Block: Output Voltage

DC/DC Block: Analog Ground

DC/DC Block: ON/OFF Control

VDR Block: Power Input

No Connection

VDR Block: LDO Output

2/52

XCM524

Series

■PRODUCT

CLASSIFICATION

●Ordering

Information

XCM524A①②③④⑤-⑥

(*1)

DC/DC Block: PWM fixed control

XCM524B①②③④⑤-⑥

(*1)

DC/DC Block: PWM/PFM automatic switching control

DESIGNATOR

①

②③

④⑤-⑥

(*1)

(*2)

DESCRIPTION

Oscillation Frequency and Options

Output Voltage

Packages

Taping Type

(*2)

SYMBOL

－

DR-G

See the chart below

USP-12B01

DESCRIPTION

The XCM524 series is Halogen and Antimony free as well as being fully RoHS compliant.

The device orientation is fixed in its embossed tape pocket.

●DESIGNATOR①

DC/DC BLOCK

①

A

B

C

D

OSCILLATION

FREQUENCY

1.2M

3.0M

1.2M

3.0M

C

L

DISCHARGE

Not Available

Available

SOFT START

Standard

High Speed

VD DELAY

FUNCTION

Available

VDR BLOCK

VD SENSE PIN

V

IN

V

IN

V

IN

V

IN

VD OUTPUT

LOGIC

Active Low Detect

●DESIGNATOR②③

V

DCOUT

②③

01

02

03

04

05

06

1.0

1.2

1.5

1.8

3.3

1.8

V

ROUT

3.3

1.8

2.5

V

DF

3.7

4.2

2.8

For other combinations of output voltages please consult with your Torex sales contact.

*This series are semi-custom products.

3/52

XCM524

Series

■BLOCK

DIAGRAMS

Step-Down DC/DC

V

OUT

R2

Phase

Compensation

Current Feedback

Current Limit

Available with CL Discharge, High Speed Soft-Start

Phase

Compensation

Step-Down DC/DC

Current Feedback

Current Limit

V

OUT

R2

Error Amp.

PWM

Comparator

Logic

Synch

Buffer

Drive

Error Amp.

PWM

Comparator

Logic

Synch

Buffer

Drive

R1

Lx

V

IN

R1

VSHORT

Lx

V

IN

VSHORT

Vref with

Soft Start,

CE

PWM/PFM

Selector

Vref with

Soft Start,

CE

PWM/PFM

Selector

CE/

UVLO Cmp

Ramp Wave

Generator

OSC

UVLO Cmp

V

SS

UVLO

R3

Ramp Wave

Generator

OSC

V

SS

CE

UVLO

R3

R4

CE/MODE

Control

Logic

R4

CE/MODE

Control

Logic

CE

* A fixed PWM control scheme because that the “CE Control Logic” outputs a low level signal to the “PWM/PFM Selector”.

* An auto PWM/PFM switching control scheme because the “CE Control Logic” outputs a high level signal to the “PWM/PFM Selector”.

*Diodes inside the circuit are an ESD protection diode and a parasitic diode.

■ABSOLUTE

MAXIMUM RATINGS

PARAMETER

V

IN1

Voltage

VROUT Current

VROUT Voltage

VDOUT Current

VDOUT Voltage

Cd Voltage

VIN2 Current

Lx Voltage

DCOUT Voltage

EN2 Voltage

Lx Current

USP-12B01

Power

USP-12B01

Dissipation

(*2)

(PCB mounted )

Junction Temperature

Operating Temperature Range

Storage Temperature Range

*1 I

ROUT

= Less than Pd /（V

IN1

-V

ROUT

）

*2 The power dissipation figure shown is PCB mounted.

for each channel.

Please refer to page 50 for details.

Ta=25℃

SYMBOL

V

IN1

I

ROUT

V

ROUT

I

DOUT

V

DOUT

V

Cd

V

IN2

V

Lx

V

DCOUT

V

EN2

I

Lx

Pd

Tj

Topr

Tstg

RATINGS

7.0

700

(*1)

V

SS

- 0.3

∼

V

IN1

+ 0.3

50

V

SS

-0.3

∼

7.0

V

SS

- 0.3

∼

V

IN1

+ 0.3

-0.3

∼

6.5

-0.3

∼

V

IN2

+ 0.3

≦

6.5

-0.3

∼

6.5

-0.3

∼

6.5

±1500

150

800 (Only 1ch operation)

600 (Both 2ch operation)

125

- 40

∼

+ 85

- 55

∼

+ 125

UNITS

V

mA

V

mA

V

mA

mW

℃

Please also note that the power dissipation is

4/52

XCM524

Series

■ELECTRICAL

CHARACTERISTICS

●XCM524xx

1ch (VDR Block)

PARAMETER

Output Voltage

(*2, 3)

Maximum Output Current

(0.9 ~ 2.4V)

Maximum Output Current

(2.5 ~ 4.9V)

Load Regulation

SYMBOL

V

ROUT(E)

I

ROUTMAX

I

ROUTMAX

CONDITIONS

I

ROUT

=30mA

V

IN1

=V

ROUT(T)

+2.0V

MIN.

TYP.

×0.98 V

ROUT(T)

×1.02

400

-

15

E-1

E-2

90

0.01

-

±100

-

50

V

mA

mV

μA

%/V

V

ppm /℃

Ta=25℃

MAX. UNITS CIRCUIT

①

②

①

-

①

VOLTAGE REGULATOR

V

IN1

=V

ROUT(T)

+2.0V

Higher than V

ROUT(T)

= 4.0V, V

IN1

=6.0V 500

△V

ROUT

-

1mA≦I

ROUT

≦100mA

Vdif1

I

ROUT

=30mA

Dropout Voltage

(*4)

Vdif2

I

ROUT

=100mA

Supply Current

V

IN1

=V

ROUT(T)

+1.0V

I

DD

-

(FV / FX / FY / FZ series)

V

ROUT(T)

≦0.9V,

V

IN1

=2.0V

V

ROUT(T)

+1.0V≦V

IN1

≦6.0V

△V

ROUT

/

V

ROUT(T)

≦0.9V,

2.0V≦V

IN1

≦6.0V

Line Regulation

-

(V

IN1

½V

ROUT

)

I

ROUT

=30mA

V

ROUT(T)

≦1.75V,

I

ROUT

=10mA

Input Voltage

V

IN1

2.0

Output Voltage

△V

ROUT

/

I

ROUT

=30mA

-

Temperature Characteristics (△Topr½V

ROUT

)

-40℃≦Topr≦85℃

V

IN1

=[V

ROUT(T)

+1.0]V+0.5Vp-pAC

When V

ROUT(T)

≦1.25V,

V

IN1

=2.25V+0.5Vp-pAC

When V

ROUT(T)

≧4.75V,

V

IN1

=5.75V+0.5Vp-pAC

I

ROUT

=50mA, f=10kHz

V

IN1

=V

ROUT(T)

+2.0V

145

0.20

6.0

-

Ripple Rejection Rate

PSRR

-

65

-

dB

③

Current Limiter

(2.4V or less)

Current Limiter

(2.5V or more)

Short-Circuit Current

Detect Voltage

(*7, 8)

VOLTAGE DETECTOR

Hysteresis Range

(*8)

I

RLIMl

I

RLIM

I

RSHORT

V

DF(E)

V

HYS

-

600

50

V

DF(T)

V

DF(T)

×0.05

6.0

8.0

10.0

12.0

15.0

±100

500

-

×1.02

V

DF(T)

×0.08

-

700

mA

V

①

④

Supply Current

(*9)

I

DOUT

V

IN1

=V

ROUT(T)

+2.0V

Higher than V

ROUT(T)

= 4.0V, V

IN1

=6.0V 500

V

IN1

=V

ROUT(T)

+2.0V

-

Higher than V

ROUT(T)

= 4.0V, V

IN1

=6.0V

×0.98

V

DF(T)

×0.02

V

IN1

= 2.0V

3.0

V

IN1

= 3.0V

4.0

V

DOUT

= 0.5V

V

IN1

= 4.0V

5.0

V

IN1

= 5.0V

7.0

V

IN1

= 6.0V

10.0

-40℃≦Topr≦85℃

V

IN1

=6.0V, Cd=0V

Delay Resistance =6.0V/Delay Current

-

300

mA

⑤

Detect Voltage

Temperature Stability

Delay Resistance

△V

DF

/

(Topr½V

DF

)

R

delay

ppm /℃

kΩ

④

⑥

NOTE:

*1 : Unless otherwise stated, (V

IN1

=V

ROUT(T)

+1.0V)

*2 : V

ROUT(T)

：Specified

VR output voltage

*3 : V

ROUT(E)

：Effective

VR output voltage.

*4 : Vdif={V

IN

1

(*6)

Refer to the E-0 chart for values less than V

DF(T)

≦1.5V.

(i.e. the VR output voltage when "V

ROUT(T)

+1.0V" is provided at the V

IN

pin while maintaining a certain IR

OUT

value).

-V

ROUT

1

(*5)

}

*5 : A voltage equal to 98% of the VR output voltage whenever a stabilized V

ROUT1

=I

ROUT

{V

ROUT(T)

+1.0V} is input.

*6 : V

IN

1：The input voltage when V

OUT

1, which appears as input voltage is gradually decreased.

*7 : V

DF(T)

：Specified

detect voltage value

*8 : V

DF(E)

：Effective

detect voltage value.

*9 : VD output current is sink current at detect.

* The electrical characteristics above are when the other channel is in stop.

5/52

XCM524AD05DR-G

XCM524AD05DR-G Overview

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