ML65F50ML [ETC]

ML65 Series DC-DC Converter; ML65系列DC-DC转换器


型号：	ML65F50ML
厂家：	ETC
描述：	ML65 Series DC-DC Converter ML65系列DC-DC转换器转换器 DC-DC转换器
文件：	总10页 (文件大小：1472K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

ML65

ML65 Series DC-DC Converter

ꢀ Application

ꢀ Features

ꢂ

Smallnumberofexternalcomponents:inductor,diodeand

capacitor.

Ultralowinputcurrent:Typical 6uA

OutputVoltageAccuracy:+/-2.5%

Lowrippleandnoise

Lowstartupvoltage:Max0.9V(with1mA input)

HighEfficiency: Typical80%

PackageAvailable:

ꢁ Power Source of Portable Products

ꢁ Palmtops

ꢁ Portable Cameras and Video Recorders

ꢁ Wireless mouse and keyboard

ꢂ

ꢀ Ordering Information

SOT-89(500mW),SOT-23(150mW)&TO-92

(300mW)

Designator

Description

Version

ꢀ General Description

Output Voltage

eg.

30=3.0V

33=3.3V

50=5.0V

The ML65 is a group of PWM Step-up DC/DC

converter IC with ultra-low supply current by

CMOS process.

Package Type

P = SOT-89

M = SOT-23

It consists of an oscillator, a PWM control circuit, a

Lx switch driver transistor, a reference voltage unit,

an error amplifier for voltage detection and an Lx

switch protection circuit. It is suitable for use with

battery-powered instruments with low noise and

ultra low supply current.

T = TO-92

Device Orientation

R = Embossed Tape

(Orientation of Device : Right)

L = Embossed Tape

(Orientation of Device : Left)

B = Bag (TO-92)

ML65 Package

Version Designator

Switching CE

Transistor Function

Package

VDD Pin

FB Pin

Features

SOT23-3

SOT89-3

TO-92

Build-in

ML65A

ML65B

Transistor

SOT23-3

SOT89-3

TO-92

External

Ext

Transistor

SOT23-5

SOT89-5

SOT23-5

SOT89-5

SOT23-5

SOT89-5

SOT23-5

SOT89-5

Build-in

Yes

ML65C

ML65D

ML65E

ML65F

Yes

Lx+CE

Ext+CE

Lx+VDD

Transistor

External

Yes

Transistor

Build-in

Yes

Transistor

Build-in

Transistor

P1/10

Rev. B, July 2005

ML65

ꢀ ML65A

ꢁ Pin Configuration

Package Pin Number

Pin Name

Function

SOT23-3

SOT89-3

TO-92

V_SS

V_OUT

L_X

Ground

Output Voltage monitor, Internal IC Power Supply

Switch

ꢁ Block Diagram

ꢁ Typical Applications

P2/10

Rev. B, July 2005

ML65

ꢀ ML65B

ꢁ Pin Configuration

Package Pin Number

Pin Name

Function

SOT23-3

SOT89-3

TO-92

V_SS

V_OUT

EXT

Ground

Output Voltage monitor, Internal IC Power Supply

External Switch Transistor Drive

ꢁ Block Diagram

ꢁ Typical Applications

P3/10

Rev. B, July 2005

ML65

ꢀ ML65C

ꢁ Pin Configuration

Package Pin Number

Pin Name

Function

SOT23-5

SOT89-5

V_SS

V_OUT

Ground

Output Voltage monitor, Internal IC Power Supply

Switch

Chip Enable

ꢁ Block Diagram

ꢁ Typical Applications

P4/10

Rev. B, July 2005

ML65

ꢀ ML65D

ꢁ Pin Configuration

Package Pin Number

Pin Name

Function

SOT23-5

SOT89-5

V_SS

V_OUT

EXT

Ground

Output Voltage monitor, Internal IC Power Supply

External Switch Transistor Drive

Chip Enable

ꢁ Block Diagram

ꢁ Typical Applications

P5/10

Rev. B, July 2005

ML65

ꢀ ML65E

ꢁ Pin Configuration

Package Pin Number

Pin Name

Function

SOT23-5

SOT89-5

V_SS

V_DD

Ground

Power Supply

Switch

V_OUT

Output Voltage Monitor

ꢁ Block Diagram

ꢁ Typical Applications

P6/10

Rev. B, July 2005

ML65

ꢀ ML65F

ꢁ Pin Configuration

Package Pin Number

Pin Name

Function

SOT23-5

SOT89-5

V_SS

V_OUT

Ground

Power Supply

Switch

Feedback

ꢁ Block Diagram

ꢁ Typical Applications

P7/10

Rev. B, July 2005

ML65

ꢀ Absolute Maximum Ratings

Parameter

Input Voltage

Symbol

V_IN

V_DD

Ratings

Units

V_DDInput Voltage

Lx Pin Voltage

EXT Pin Voltage

CE Pin Voltage

Lx Pin Current

EXT Pin Current

V_LX

-0.3 ~ V_OUT+ 0.3

600

V_EXT

VCE

I_LX

I_EXT

+ 30

SOT-89

500

300

150

Continuous

Total Power

Dissipation

TO-92

SOT-23

Operating Ambient

Temperature

Storage Temperature

Topr

Tstg

-25 ~ +85

^oC

-40 ~ +125

ꢀ Electrical Characteristics

V_IN= V_OUT* 0.6, V_SS= 0V, I_OUT= 10mA, T_a= 25 ^oC, unless otherwise specified.

Parameter

Symbol

Conditions

Min Typ Max Units

Vout *

0.975

Vout *

1.025

Output Voltage

V_OUT

Vout

0.8

Input Voltage

Startup Voltage

Hold-on Voltage

V_IN

V_START

V_HOLD

0.9

I_OUT= 1mA, V_IN: 0→2V

I_OUT= 1mA, V_IN: 2→0V

No external component,

V_IN= V_OUT* 0.95

0.7

Supply Current 1

I_DD1

30~70

Supply Current 2

Lx Switching Current

Lx Leakage Current

I_DD2

I_LX

V_IN= V_IN+ 0.5V

V_LX= 0.4V, V_IN= V_OUT* 0.95

V_IN=V_LX=6.0V

11~26

250

I_LXLEAK

0.5

No external component,

V_IN= V_OUT* 0.95,

V_EXT= V_OUT– 0.4V

No external component,

V_IN= V_OUT* 0.95,

EXT “High” On Current

EXT “Low” On Current

I_EXTH

-5.5

I_EXTL

V_EXT= 0.4V

V_IN= V_OUT* 0.95

CE “High” Voltage

CE “Low” Voltage

CE “High” Current

CE “Low” Current

Oscillator Frequency

Duty Cycle

V_CEH

V_CEL

I_CEH

0.7

V_IN= V_OUT* 0.95

V_OUT= 6.0V, V_CE= 6.0V

V_OUT= 6.0V, V_CE= 0.0V

0.2

0.25

-0.25

KHz

I_CEL

F_OSC

100

MAXDTY

EFF

T_SS

Efficiency

Slow-Start Time

Note : 1. Schokkty diode: 1N5817 or 1N5819 (forward voltage drop : 0.2V)

2. Inductor : 47uH (ESR < 0.5Ω)

3. Capacitor : Tantalum type, 47 uF

P8/10

Rev. B, July 2005

ML65

ꢀ Electrical Characteristics

ML65A30

Parameter

V_OUT= 3.0V V_IN= 1.8V, I_OUT= 10mA, Ta = 25 ^oC, unless otherwise provided.

Symbol

V_OUT

V_IN

Conditions

Min Typ Max Units

Output Voltage

Input Voltage

2.925 3.000 3.075

Startup Voltage

V_START

V_HOLD

I_DD1

I_OUT= 1mA

V_IN= 2.85V

0.8

0.9

Hold-on Voltage

Supply Current 1

Supply Current 2

Lx Switching Current

Lx Leakage Current

Oscillator Frequency

Oscillator Duty Cycle

Efficiency

0.7

KHz

I_DD2

V_IN= 3.05V

I_LX

V_LX=0.4V, V_IN=2.85V

V_IN=6.0V, V_LX=6.0V

250

I_LXLEAK

F_OSC

0.5

150

100

MAXDTY

EFF

Slow –Start Time

T_SS

ML65A33

Parameter

V_OUT= 3.3V V_IN= 2.0V, I_OUT= 10mA, Ta = 25 ^oC, unless otherwise provided.

Symbol

V_OUT

V_IN

Conditions

Min Typ Max Units

Output Voltage

Input Voltage

3.218 3.300 3.383

Startup Voltage

V_START

V_HOLD

I_DD1

I_OUT= 1mA

V_IN= 3.135V

0.8

0.9

Hold-on Voltage

Supply Current 1

Supply Current 2

Lx Switching Current

Lx Leakage Current

Oscillator Frequency

Oscillator Duty Cycle

Efficiency

0.7

KHz

I_DD2

V_IN= 3.35V

I_LX

V_LX=0.4V, V_IN=3.135V

V_IN=6.0V, V_LX=6.0V

260

I_LXLEAK

F_OSC

0.5

150

100

MAXDTY

EFF

Slow –Start Time

T_SS

ML65A50

Parameter

V_OUT= 5.0V V_IN= 3.0V, I_OUT= 10mA, Ta = 25 ^oC, unless otherwise provided.

Symbol

V_OUT

V_IN

Conditions

Min Typ Max Units

Output Voltage

Input Voltage

4.875 5.000 5.125

Startup Voltage

V_START

V_HOLD

I_DD1

I_OUT= 1mA

V_IN= 4.75V

0.8

0.9

Hold-on Voltage

Supply Current 1

Supply Current 2

Lx Switching Current

Lx Leakage Current

Oscillator Frequency

Oscillator Duty Cycle

Efficiency

0.7

KHz

I_DD2

V_IN= 5.05V

I_LX

V_LX=0.4V, V_IN= 4.75V

V_IN=6.0V, V_LX=6.0V

290

I_LXLEAK

F_OSC

0.5

150

100

MAXDTY

EFF

Slow –Start Time

T_SS

P9/10

Rev. B, July 2005

ML65

ꢀ Application Notes

1. It is recommended to use capacitor with a capacity of 10uF or more for good frequency characteristics, otherwise it will lead

to high output ripple. Tantalum type capacitor is recommended. As there may be the case where a spike-shaped high voltage

is generated by the inductor when Lx transistor is turned off, the operating voltage of capacitor should be at least three times

of the output set voltage so as to avoid over-voltage damage.

2. It is recommended to use inductor has sufficiently small d.c. resistance, large allowable current and hardly reaches magnetic

saturation. When the inductance of inductor is small, there may be the case that the inductor current exceeds the absolute

maximum ratings at the maximum load condition.

3. It is recommended to place external components as close as possible to the DC/DC converter so as to minimize the

interconnection parasitic between components and DC/DC converter, especially for the capacitor connected to V_OUTpin. It

is recommended to place 0.1uF ceramic capacitor between V_OUTpin and V_SSpin.

4. It is recommended to provide sufficient grounding for V_SSpin. This will help to stable the zero level within DC/DC

converter induced by the switching current level variation during operation. And the insufficient grounding may result in

unstable operation of DC/DC converter.

The information presented in this document does not form part of any quotation or contract, is believed to be accurate and

reliable and may be changed without notice. No liability will be accepted by the publisher for any consequence of its use.

P10/10

Rev. B, July 2005

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