Datasheet > TK65020

TK65020

更新时间： 2024-11-19 22:32:35

品牌	Logo	应用领域
TOKO		转换器升压转换器
页数	文件大小	规格书
14页	98K
描述
STEP-UP VOLTAGE CONVERTER

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中文翻译

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数据手册

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TK65020 数据手册

ADVANCED INFORMATION

TK65020

ADVANCED

INFORMATION

STEP-UP VOLTAGE CONVERTER

FEATURES

APPLICATIONS

■ Guaranteed 0.9 V Operation

■ Very Low Quiescent Current

■ Internal Bandgap Reference

■ High Efficiency MOS Switching

■ Low Output Ripple

■ Battery Powered Systems

■ Cellular Telephones

■ Pagers

■ Personal Communications Equipment

■ Portable Instrumentation

■ Portable Consumer Equipment

■ Radio Control Systems

■ Laser-Trimmed Output Voltage

■ Laser-Trimmed Oscillator

■ Undervoltage Lockout

■ Regulation by Pulse Burst Modulation (PBM)

DESCRIPTION

The TK65020 low power step-up DC-DC converter is

designed for portable battery-powered systems, capable

of operating from a single battery cell down to 0.9 V. The

TK65020 provides the power switch and the control circuit

for a boost converter. The converter takes a DC input and

boosts it up to a regulated 2.5 V output .

taken to achieve reliability through the use of Oxide,

double Nitride passivation. The TK65020 is available in a

miniature 6-pin SOT-23L-6 surface mount package.

For other output levels, please refer to the TK651xx and

TK652xx Toko series of step-up converters.

The output voltage is laser-trimmed. An internal

Undervoltage Lockout (UVLO) circuit is utilized to prevent

the inductor switch from remaining in the “on” mode when

the battery voltage is too low to permit normal operation.

Pulse Burst Modulation (PBM) is used to regulate the

voltage at the V_OUTpin of the IC. PBM is the process in

whichanoscillatorsignalisgatedornotgatedtotheswitch

drive each period. The decision is made just before the

start of each cycle and is based on comparing the output

voltage to an internally-generated bandgap reference.

The decision is latched, so the duty ratio is not modulated

within a cycle. The average duty ratio is effectively

modulated by the “bursting” and skipping of pulses which

can be seen at the SW pin of the IC. Special care has been

TK65020

20P

GND

OUT

BLOCK DIAGRAM

OUT

Vref

UVLO

ORDERING INFORMATION

CONTROL

CIRCUIT

TK65020MTL

Tape/Reel Code

OSCILLATOR

TAPE/REEL CODE

TL: Tape Left

GND

January 1999 TOKO, Inc.

Page 1

12 3 4 5 6 7...14

中文翻译

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