8188 Datasheet

IC型號(hào)：
8188
PDF描述：
LOW-DROPOUT REGULATORS . HIGH EFFICIENCY
文件大?。?/label>
164.66KB
PDF頁數(shù)：
12頁
芯片廠家：
ALLEGRO

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8188

PRELIMINARY INFORMATION

(subject to change without notice)

July 13, 1999

LOW-DROPOUT REGULATORS

鈥?HIGH EFFICIENCY

Designed specifically to meet the requirement for extended opera-

tion of battery-powered equipment such as cordless and cellular tele-

phones, the A8188S鈥?voltage regulators offer the reduced dropout

voltage and quiescent current essential for maximum battery life.

Applicable also to palmtop computers and personal data assistants,

these devices deliver a regulated output at up to 250 mA (transient),

which is limited only by package power dissipation. Regulated output

voltages between 2.5 V and 3.3 V are trimmed at wafer probe.

A PMOS pass element provides a typical dropout voltage of only

90 mV at 60 mA of load current. The low dropout voltage permits

deeper battery discharge before output regulation is lost. Quiescent

current does not increase significantly as the dropout voltage is ap-

proached, an ideal feature in standby/resume power systems where data

integrity is crucial. Regulator accuracy and excellent temperature

characteristics are provided by a bandgap reference. The A8188SL-xx

includes ENABLE inputs to give the designer complete control over

power up, standby, or power down.

These devices are supplied, without the ENABLE function, in a

standard 3-lead SOT-89/TO-243AA small-outline plastic transistor

package (suffix 鈥楲T鈥?. Dual regulators (A8188SL-xx) are provided in

an 8-lead SOIC package. All devices are rated for operation over a

temperature range of -20擄C to +85擄C.

Data Sheet

27468.8

A8188SLT-xx

where 鈥?xx鈥?is the required output voltage in tenths

ABSOLUTE MAXIMUM RATINGS

Input Voltage, V

. . . . . . . . . . . . . .

10 V

Peak Output Current,

. . . . . . . . . . . . . . . . . .

250 mA*

Enable Input Voltage, V

. . . . . . . . .

Operating Temperature Range,

. . . . . . . . . . . . .

-20

擄

C to +85

擄

Junction Temperature, T

. . . .

+150

擄

鈥?/div>

Storage Temperature Range,

. . . . . . . . . . . .

-40

擄

C to +150

擄

* Output current rating is limited by input

voltage, duty cycle, and ambient tempera-

ture. Under any set of conditions, do not

exceed a junction temperature of +150擄C.

See following pages.

鈥?Fault conditions that produce excessive

junction temperature will activate device

thermal shutdown circuitry. These condi-

tions can be tolerated but should be

avoided.

U Y

D L

O N

R O

P E

D C

E N

U E

IN ER

T F

N E

O R

C R

IS O

D F

鈥?/div>

GND

Dwg. PS-022-2

OUT

FEATURES AND BENEFITS

High Efficiency Provides Extended Battery Life

90 mV Typical Dropout Voltage at I

= 60 mA

碌A(chǔ)

Typical Quiescent Current

Less Than 1

碌A(chǔ)

鈥淪leep鈥?Current

250 mA Peak Output Current

Improved PSRR and Transient Performance

Internal Thermal Protection

APPLICATIONS

Cordless and Cellular Telephones

Personal Data Assistants

Personal Communicators

Palmtop Computers

Always order by complete part number, e.g.,

A8188SLT-30

現(xiàn)有數(shù)量
3,206現(xiàn)貨
價(jià)格
1 : ￥30.19000散裝
系列
-
包裝
散裝
產(chǎn)品狀態(tài)
在售
形狀
圓柱形
磁化
軸向
材料
釹鐵硼（NdFeB）
表面
NiCuNi
等級(jí)
N35
高斯強(qiáng)度
1456G（表面磁場(chǎng)強(qiáng)度）
尺寸
1.000" 直徑 x 0.125" 高（25.4mm x 3.18mm）
工作溫度
80°C（TA）

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