TK65224

更新时间： 2024-11-11 22:42:15

品牌	Logo	应用领域
TOKO		转换器监控监视器升压转换器
页数	文件大小	规格书
20页	145K
描述
STEP-UP VOLTAGE CONVERTER WITH VOLTAGE MONITOR

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中文翻译

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数据手册

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TK65224 数据手册

ADVANCED INFORMATION

TK652xx

STEP-UP VOLTAGE CONVERTER WITH VOLTAGE MONITOR

APPLICATIONS

FEATURES

■ Battery Powered Systems

■ Cellular Telephones

■ Guaranteed 0.9 V Operation

■ Very Low Quiescent Current

■ Internal Bandgap Reference

■ High Efficiency MOS Switching

■ Low Output Ripple

■ Pagers

■ Personal Communications Equipment

■ Portable Instrumentation

■ Portable Consumer Equipment

■ Radio Control Systems

■ Laser-Trimmed Output Voltage

■ Low Output Voltage Monitor

■ Low Battery Monitor

■ Undervoltage Lockout

■ Regulation by Pulse Burst Modulation (PBM)

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 taken to achieve

high reliability through the use of Oxide, double Nitride

passivation. The TK652xx is available in a miniature

SOT-23L-6 surface mount package.

DESCRIPTION

The TK652xx 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

TK652xx 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 1.8, 2.1, or 2.4 V.

Customized levels of accuracy in oscillator frequency and

output voltage are available.

Theoutputvoltageislaser-trimmed.Twointernaldetectors

monitor the output voltage and battery voltage. The Low

Output Indicator (LOI) generates an active low when the

battery voltage falls below 90 % of the output voltage. The

Low Battery Indicator (LBI) generates an active low when

the battery voltage falls below 1.1 V. These outputs can be

used to notify the microprocessor or power monitor circuit

of a fault condition. 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 which an

oscillator signal is gated or not gated to the switch drive

each period. The decision is made just before the start of

each cycle and is based on comparing the output voltage

toaninternally-generatedbandgapreference.Thedecision

TK652xx

LOI

20P

LBI

GND

OUT

BLOCK DIAGRAM

OUT

LBI

Vref

UVLO

ORDERING INFORMATION

TK652xxM

CONTROL

CIRCUIT

LOI

Tape/Reel Code

Voltage Code

OSCILLATOR

TAPE/REEL CODE

VOLTAGE CODE

18 = 1.8 V

TL: Tape Left

GND

21 = 2.1 V

24 = 2.4 V

January 1999 TOKO, Inc.

Page 1

12 3 4 5 6 7...20

中文翻译

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与TK65224相关器件

型号	品牌	获取价格	描述	数据表
TK65224M	TOKO	获取价格	STEP-UP VOLTAGE CONVERTER WITH VOLTAGE MONITOR
TK65224MTL	TOKO	获取价格	STEP-UP VOLTAGE CONVERTER WITH VOLTAGE MONITOR
TK65224MTL/24M	TOKO	获取价格	STEP-UP VOLTAGE CONVERTER WITH VOLTAGE MONITOR
TK652XX	TOKO	获取价格	STEP-UP VOLTAGE CONVERTER WITH VOLTAGE MONITOR
TK653XX	TOKO	获取价格	HIGH CURRENT STEP-UP CONVERTER WITH BATTERY MONITOR
TK65418	TOKO	获取价格	STEP-DOWN CONVERTER WITH BATTERY MONITOR
TK65418M	TOKO	获取价格	STEP-DOWN CONVERTER WITH BATTERY MONITOR
TK65418MTL	TOKO	获取价格	STEP-DOWN CONVERTER WITH BATTERY MONITOR
TK65418MTL/418	TOKO	获取价格	STEP-DOWN CONVERTER WITH BATTERY MONITOR
TK65419	TOKO	获取价格	STEP-DOWN CONVERTER WITH BATTERY MONITOR

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