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기능 LOW-DROPOUT REGULATORS . HIGH EFFICIENCY
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A8188SLT 데이터시트, 핀배열, 회로
8188
PRELIMINARY INFORMATION
(subject to change without notice)
July 13, 1999
LOW-DROPOUT REGULATORS
— HIGH EFFICIENCY
A8188SLT-xx
Designed specifically to meet the requirement for extended opera-
tion of battery-powered equipment such as cordless and cellular tele-
phones, the A8188S— voltage regulators offer the reduced dropout
voltage and quiescent current essential for maximum battery life.
Applicable also to palmtop computers and personal data assistants,
VR
DUCTLY1 2
3
PRO ONDwg.PS-022-2
D Ewhere “-xx” is the required output voltage in tenths
INUE ENCABSOLUTE MAXIMUM RATINGS
RInput Voltage, VI . . . . . . . . . . . . . . 10 V
T EPeak Output Current,
N FIOM . . . . . . . . . . . . . . . . . . 250 mA*
Enable Input Voltage, VE . . . . . . . . . VI
O EOperating Temperature Range,
C RTA .
Junction
............
Temperature, TJ
-20°C
....
to +85°C
+150°C
IS RStorage Temperature Range,
TS . . . . . . . . . . . . -40°C to +150°C
D FO* Output current rating is limited by input
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 ‘LT’). Dual regulators (A8188SL-xx) are provided in
an 8-lead SOIC package. All devices are rated for operation over a
temperature range of -20°C to +85°C.
FEATURES AND BENEFITS
I High Efficiency Provides Extended Battery Life
I 90 mV Typical Dropout Voltage at IO = 60 mA
I 55 µA Typical Quiescent Current
Less Than 1 µA “Sleep” Current
I 250 mA Peak Output Current
I Improved PSRR and Transient Performance
I Internal Thermal Protection
voltage, duty cycle, and ambient tempera-
ture. Under any set of conditions, do not
exceed a junction temperature of +150°C.
See following pages.
APPLICATIONS
I Cordless and Cellular Telephones
I Personal Data Assistants
I Personal Communicators
† Fault conditions that produce excessive
junction temperature will activate device
I Palmtop Computers
thermal shutdown circuitry. These condi-
tions can be tolerated but should be
avoided.
Always order by complete part number, e.g., A8188SLT-30 .




A8188SLT pdf, 반도체, 판매, 대치품
8188
LOW-DROPOUT
REGULATORS
ELECTRICAL CHARACTERISTICS at TA = +25°C (unless otherwise noted).
Limits
Characteristic
Symbol Test Conditions
Min. Typ. Max.
Output Voltage
(reference specified VO(nom))
VO
4 V VI 8 V, 10 µA IO 100 mA*
VI = VO(nom), IO = 60 mA
Output Volt. Temp. Coeff.
aVO VI = 6 V, IO = 10 mA, TJ 125°C
Line Regulation
VO(VI) 4 V VI 8 V, IO = 1 mA
Load Regulation
VO(IO) 1 mA IO 100 mA*, VI = 8 V
1 mA IO 100 mA*, VI = 6 V
1 mA IO 100 mA*, VI = 4 V
Dropout Voltage
VImin – VO IO = 60 mA
IO = 125 mA*
Quiescent Current
(GND terminal current)
IQ VI = 8 V, IO 1 mA, VE 2.0 V
VI = 8 V, IO 100 mA*, VE 2.0 V
VI = VO(nom), IO = 60 mA
IQ(off)
4 V VI 8 V, VE 0.8 V
ENABLE Input Voltage
VEH 4 V VI 8 V, Output ON
VEL 4 V VI 8 V, Output OFF
ENABLE Input Current
IE VE = VI = 8 V
Thermal Shutdown Temp.
TJ
Rejection Ratio
PSRR
VI = VO(nom) + 1.5 V, Vi = 100 mV, IO = 10 mA:
f = 1 kHz
-0.05
-0.30
2.0
150
0.00
-0.30
90
190
55
70
200
+0.05
10
40
40
40
150
300
70
85
1.0
0.8
±1.0
— 60
f = 10 kHz
– 50 —
Noise
en 10 Hz f 100 kHz, IO = 10 mA, CO = 10 µF — 2.0
Typical values are at TA = +25°C and are given for circuit design information only.
* Pulse test (20 ms). See previous page for duty cycle limitations.
Units
V
V
mV/°C
mV
mV
mV
mV
mV
mV
µA
µA
µA
µA
V
V
µA
°C
dB
dB
µV/Hz
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000

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A8188SLT 전자부품, 판매, 대치품
8188
LOW-DROPOUT
REGULATORS
60
55
50
45
-50
TYPICAL CHARACTERISTICS (cont’d)
QUIESCENT (GROUND TERMINAL) CURRENT
250
VI = 6 V
IO = 0
VE 2 V
200
IO= 0
TA = 25°C
150
100
0 +50
AMBIENT TEMPERATURE in °C
+100
Dwg. GP-051-3
50
0
-2.0
VO(nom)
+2.0
+4.0
INPUT VOLTAGE in VOLTS
+6.0
Dwg. GP-058-1
DROPOUT VOLTAGE
0.25
0.20
0.15
TA = 85°C
TA = 25°C
TA = -20°C
0.10
0.05
0
0 25 50 75 100 125 150
OUTPUT CURRENT in mA
Dwg. GP-054-2
CAUTION: Maximum allowable duty cycle will be significantly less than 100% at high temperatures, at high input voltages, or at high output
currents. See appropriate Maximum Allowable Output Current table.
www.allegromicro.com

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부품번호상세설명 및 기능제조사
A8188SL

LOW-DROPOUT REGULATORS . HIGH EFFICIENCY

Allegro MicroSystems
Allegro MicroSystems
A8188SLT

LOW-DROPOUT REGULATORS . HIGH EFFICIENCY

Allegro MicroSystems
Allegro MicroSystems

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