CYT2606E50T [ETC]

PFM Step-Up DC-DC Converter; PFM升压型DC -DC转换器


型号：	CYT2606E50T
厂家：	ETC
描述：	PFM Step-Up DC-DC Converter PFM升压型DC -DC转换器转换器
文件：	总8页 (文件大小：274K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

CYT2606L

PFM Step-Up DC-DC Converter

Features

General Description

ꢀ400KHz Maximum Operation Frequency

ꢀ2.0V to 5.0V Output Voltage With 0.1V Step

ꢀLow Start-up Voltage: 0.8V at 1mA

ꢀ±2% Output Voltage Accuracy

ꢀUp to 88% Efficiency

The CYT2606L Series are PFM step-up DC-DC

converters with very low ripple noise due to the

high operation frequency. The maximum

operation frequency is 400KHz.

Only three components are required to realize the

conversion from the battery voltage to a selected

output voltage.

ꢀOutput current: 300mA at 2.5V input, 3.3V

output

A driver pin (EXT) is provided for driving

external power transistor to extend the output

current capability where large current is required.

ꢀLow Ripple and Low Noise

ꢀOutput Current Extendable by External

Switch

Enable pin (EN) is also provided so that the

circuit can be powered down.

Applications

ꢀPower source for applications where a higher

voltage than the battery voltage is required

Ordering Information

ꢀOne to three cell battery devices

ꢀPower source for cameras, camcorders,

VCRs, PDAs, pagers and hand held

communication instrument

Typical Applications

1 of 1

CYT2606L

Block Diagram

Current

limiting

comparator

VOUT

Error

Amplifier

EXT

buffer

PFM

control

1.24V

bandgap

OSC

400KHz

Chip

Enable

GND

Pin Assignment

Part Marking and Package Type

Description

Name

CYT2606L

LXXF

CYT2606L

LXXE

CYT2606L

EXXT

CYT2606L

EXXF

CYT2606L

EXXE

LXXT

SOT-23-3

SOT-23-5

SOT-89

SOT-23-3

SOT-23-5

SOT-89

EXT

VOUT

Switching pin

Buffer output for external transistor

Output voltage

Chip enable (active high)

Ground

GND

No connection

2 of 2

CYT2606L

Absolute Maximum Ratings

Type

Symbol

Description

Value

Unit

Vmax

Maximum voltage on VOUT and VLX pins

Voltage range on EXT and EN pins

Maximum current on LX pin

Voltage

Vmin-max

ILXmax

IEXTmax

Psot-23-3

Psot-23-5

Psot-89

-0.3-VOUT+0.3

1000

Current

Maximum current on EXT pin

100

Maximum Power dissipation for SOT-23-3 package

Maximum Power dissipation for SOT-23-5 package

Maximum Power dissipation for SOT-89 package

Operation temperature range

0.25

Power dissipation

0.25

0.5

Tmin-max

Tstorage

VESD

-20-85

-40-165

2000

^oC

Thermal

ESD

Storage temperature range

ESD voltage for human body mode

Electronic Characteristics

Parameter

Symbol

Test Condition

Min

-2

Typ

Max

Unit

Output voltage accuracy

Maximum input voltage

Start-up voltage

△VOUT

VIN_MAX

V_START

0.7

VOUT

0.85

ILOAD=1mA, VIN:0→2V

ILOAD=1mA, VIN:2→0V

V_HOLD

0.6

Hold-on voltage

F_MAX

DC_OSC

350

400

450

KHz

Maximum oscillation frequency

Oscillator duty cycle

Efficiency

600

800

1000

Current limit

I_LIMIT

VIN=1.8V VOUT=3.0V

VIN=1.8V VOUT=5.0V

No load, EN=“low”

Input current at no load

IIN0

Input standby current

EN “High” voltage level

EN “low” level

IINQ

0.4*VOUT

0.2

0.1

EN “high” input current

EN “low” input current

EXT output current

-0.1

-5

3 of 3

CYT2606L

Typical Characteristics (Using Internal Switch Transistor)

Start-up/Hold-on vs. Output Current

2.5

1.5

Start-up

L=47uH

C=47uF

0.5

Hold-on

100

Output Current(mA)

1000

Output Voltage vs. Output Current

3.5

2.5V

1.5V

2.5

L=47uH

C=47uF

VOUT=3.4

1.5

100

150

200

250

300

350

Output Current (mA)

4 of 4

CYT2606L

Efficiency vs. Output Current

2.5V

L=47uH

C=47uF

VOUT=3.4V

1.5V

100

1000

Output Current(mA)

Output Current vs. Ripple Voltage

250

200

150

100

2.5V

L=47uH

C=47uF

1.5V

VOUT=3.4V

100

150

200

250

300

350

Output Current (mA)

5 of 5

CYT2606L

Output Current vs. Ripple Voltage

2.5V

1.5V

L=47uH

C=2*47uF

VOUT=3.4V

100

150

200

250

300

350

Output Current (mA)

Output Current vs. Ripple Voltage

2.5V

L=47uH

C=3*47uF

VOUT=3.4V

1.5V

100

150

200

250

300

350

Output Current (mA)

6 of 6

CYT2606L

Package Information

Dimensions In Millimeters

Dimensions In Inches

Min Max

0.041 0.049

Symbol

Min

Max

1.050

0.000

1.050

0.300

0.100

1.250

0.100

1.150

0.400

0.200

0.000

0.041

0.012

0.004

0.045

0.016

0.008

2.820

3.020

0.111

0.119

1.500

2.650

1.700

2.950

0.059

0.104

0.067

0.116

0.950TYP

0.037TYP

0.071

0.028REF

0.012

8ٛ

1.800

2.000

0.079

0.024

0.700REF

0.300

08ٛ

0.600

ٛٛ0

7 of 7

CYT2606 L

Symbol

Min

Max

Min

Max

1.400

0.320

0.400

0.350

4.400

1.600

0.520

0.580

0.440

4.600

0.055

0.013

0.016

0.014

0.173

0.063

0.197

0.023

0.017

0.181

1.550 REF

0.061 REF

2.300

3.940

2.600

4.250

0.091

0.155

0.102

0.167

1.500 TYP

3.000 TYP

0.060TYP

0.118TYP

0.900

1.200

0.035

0.047

8 of 8

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