A8188SL-25 [SANKEN]
Fixed Positive LDO Regulator, 2.5V, 0.3V Dropout, PDSO8, SOIC-8;
| 型号： | A8188SL-25 |
| 厂家： | 
SANKEN ELECTRIC |
| 描述： | Fixed Positive LDO Regulator, 2.5V, 0.3V Dropout, PDSO8, SOIC-8 光电二极管 输出元件 调节器 |
| 文件： | 总12页 (文件大小：163K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
8188
PRELIMINARY INFORMATION
(subject to change without notice)
July 13, 1999
LOW-DROPOUT REGULATORS
— 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— 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.
A8188SLT-xx
VR
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.
2
1
3
Dwg. PS-022-2
where “-xx” is the required output voltage in tenths
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.
ABSOLUTE MAXIMUM RATINGS
Input Voltage, VI . . . . . . . . . . . . . . 10 V
Peak Output Current,
FEATURES AND BENEFITS
IOM . . . . . . . . . . . . . . . . . . 250 mA*
Enable Input Voltage, VE . . . . . . . . . VI
Operating Temperature Range,
I High Efficiency Provides Extended Battery Life
I 90 mV Typical Dropout Voltage at IO = 60 mA
I 55 µA Typical Quiescent Current
TA . . . . . . . . . . . . . -20°C to +85°C
Less Than 1 µA “Sleep” Current
†
Junction Temperature, TJ . . . . +150°C
Storage Temperature Range,
I 250 mA Peak Output Current
I Improved PSRR and Transient Performance
I Internal Thermal Protection
TS . . . . . . . . . . . . -40°C to +150°C
* 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°C.
See following pages.
APPLICATIONS
I Cordless and Cellular Telephones
I Personal Data Assistants
I Personal Communicators
I Palmtop Computers
† Fault conditions that produce excessive
junction temperature will activate device
thermal shutdown circuitry. These condi-
tions can be tolerated but should be
avoided.
Always order by complete part number, e.g., A8188SLT-30 .
8188
LOW-DROPOUT
REGULATORS
FUNCTIONAL BLOCK DIAGRAM
(1/2 of A8188SL-xx shown)
8
1
IN
OUT
DRIVE
BIAS
ERROR
AMP
7
ENABLE
BANDGAP
REF.
2
GND
Dwg. FS-012-8
Always order by complete part number:
Part Number
A8188SL-xx
A8188SLT-xx
Package
RθJA
8-Lead SOIC
108°C/W
258°C/W
3-Lead SOT-89/TO-243AA
A8188SL-xx
where “-xx” is the required output voltage (VO(nom)) in tenths
(25 through 33), e.g., -30 = 3.0 volts.
8
7
6
5
IN
OUT
1
2
3
4
1
1
VR
VR
ENABLE
GND
1
1
IN
2
OUT
2
ENABLE
GND
2
2
Dwg. PS-023
NOTE — There is an indeterminate resistance between terminals
2 and 4. For proper operation, terminals 2 and 4 must be
externally connected together.
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000
Copyright © 1999, 2000 Allegro MicroSystems, Inc.
8188
LOW-DROPOUT
REGULATORS
A8188SL-xx Maximum Allowable Total Average Output Current* with device mounted on 2.24" x
2.24" (56.9 mm x 56.9 mm) solder-coated copper-clad board in still air.
Allowable Total Average (10 ms) Output Current in Milliamperes with TJ = 150°C, Duty Cycle = 100%†
VI - VO
TA
1.0
500
500
500
500
1.5
500
500
490
400
2.0
500
460
370
300
2.5
460
370
295
240
3.0
385
305
245
200
4.0
285
230
185
150
5 .0
230
185
145
120
6.0
190
150
120
100
7.0*
165
130
105
85
25°C
50°C
70°C
85°C
* Absolute maximum peak output current rating for either output is 250 mA; absolute maximum input voltage is 10 V.
† IO = (TJ – TA)/([VI – VO] RθJA x dc) = (150 – TA)/([VI – VO] x 108 x 1.00)
Output current rating can be increased (to 250 mA maximum per output) by additional heat sinking or reducing the duty
cycle. Conditions that produce excessive junction temperature will activate device thermal shutdown circuitry. These
conditions can be tolerated but should be avoided.
A8188SLT-xx Maximum Allowable Output Current with device mounted on 2.24" x 2.24" (56.9 mm
x 56.9 mm) solder-coated copper-clad board in still air.
Allowable Average (10 ms) Output Current in Milliamperes with TJ = 150°C, Duty Cycle = 100%†
VI - VO
TA
1.0
250
250
250
250
1.5
250
250
205
165
2.0
240
190
155
125
2.5
190
155
120
100
3.0
160
125
100
80
4.0
120
95
5.0
95
75
60
50
6.0
80
65
50
40
7.0*
65
25°C
50°C
70°C
85°C
55
75
40
60
35
* Absolute maximum input voltage is 10 V.
† IO = (TJ – TA)/([VI – VO] RθJA x dc) = (150 – TA)/([VI – VO] x 258 x 1.00)
Output current rating can be increased (to 250 mA maximum) by additional heat sinking or reducing the duty cycle.
Conditions that produce excessive junction temperature will activate device thermal shutdown circuitry. These conditions
can be tolerated but should be avoided.
www.allegromicro.com
8188
LOW-DROPOUT
REGULATORS
ELECTRICAL CHARACTERISTICS at TA = +25°C (unless otherwise noted).
Limits
Characteristic
Symbol
Test Conditions
Min.
-0.05
-0.30
—
Typ.
Max.
+0.05
—
Units
V
Output Voltage
VO
4 V ≤ VI ≤ 8 V, 10 µA ≤ IO ≤ 100 mA*
VI = VO(nom), IO = 60 mA
0.00
—
(reference specified VO(nom)
)
V
Output Volt. Temp. Coeff.
Line Regulation
aVO
VI = 6 V, IO = 10 mA, TJ ≤ 125°C
4 V ≤ VI ≤ 8 V, IO = 1 mA
-0.30
—
—
mV/°C
mV
mV
mV
mV
mV
mV
µA
∆VO(∆VI)
∆VO(∆IO)
—
10
Load Regulation
1 mA ≤ IO ≤ 100 mA*, VI = 8 V
1 mA ≤ IO ≤ 100 mA*, VI = 6 V
1 mA ≤ IO ≤ 100 mA*, VI = 4 V
—
—
40
—
—
40
—
—
40
Dropout Voltage
VImin – VO IO = 60 mA
IO = 125 mA*
—
90
150
300
70
—
190
55
Quiescent Current
IQ
VI = 8 V, IO ≤ 1 mA, VE ≥ 2.0 V
—
(GND terminal current)
VI = 8 V, IO ≤ 100 mA*, VE ≥ 2.0 V
VI = VO(nom), IO = 60 mA
4 V ≤ VI ≤ 8 V, VE ≤ 0.8 V
4 V ≤ VI ≤ 8 V, Output ON
4 V ≤ VI ≤ 8 V, Output OFF
VE = VI = 8 V
—
70
85
µA
—
200
—
—
µA
IQ(off)
VEH
VEL
—
1.0
—
µA
ENABLE Input Voltage
2.0
—
—
V
—
0.8
1.0
—
V
ENABLE Input Current
Thermal Shutdown Temp.
Rejection Ratio
IE
—
—
µA
TJ
150
—
°C
PSRR
VI = VO(nom) + 1.5 V, Vi = 100 mV, IO = 10 mA:
f = 1 kHz
—
–
60
50
—
—
dB
dB
f = 10 kHz
Noise
en
10 Hz ≤ f ≤ 100 kHz, IO = 10 mA, CO = 10 µF
—
2.0
—
µV/√Hz
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.
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000
8188
LOW-DROPOUT
REGULATORS
TYPICAL CHARACTERISTICS
LOAD REGULATION
LINE REGULATION
+0.03
+0.02
+0.01
+0.06
+0.04
+0.02
T
= -20°C
A
50 mA INTERVALS
V = 8 V
I
= 0 mA
I
O
V = 6 V
I
V
V
O(nom)
O(nom)
I
= 100 mA
-0.01
-0.02
-0.03
-0.04
O
-0.02
-0.04
-0.06
-0.08
V = 4 V
I
T
= -20°C
A
125
7.0
0
25
50
75
100
150
2.0
3.0
4.0
5.0
6.0
8.0
INPUT VOLTAGE in VOLTS
OUTPUT CURRENT in mA
Dwg. GP-052-13
Dwg. GP-053-13
+0.03
+0.02
+0.01
+0.06
+0.04
+0.02
T
= 25°C
A
50 mA INTERVALS
I
= 0 mA
V = 8 V
I
O
V
V
O(nom)
O(nom)
-0.01
-0.02
-0.03
-0.04
-0.02
-0.04
-0.06
-0.08
I
= 100 mA
O
V = 4 V
I
T
= 25°C
A
2 V INTERVALS
7.0
125
0
25
50
75
100
150
2.0
3.0
4.0
5.0
6.0
8.0
INPUT VOLTAGE in VOLTS
OUTPUT CURRENT in mA
Dwg. GP-053-14
Dwg. GP-052-14
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
8188
LOW-DROPOUT
REGULATORS
TYPICAL CHARACTERISTICS (cont’d)
LOAD REGULATION LINE REGULATION
+0.03
+0.02
+0.01
+0.06
+0.04
+0.02
T
= 85°C
A
50 mA INTERVALS
V
V
O(nom)
O(nom)
V = 7 V
I
I
= 0 mA
O
V = 6 V
I
-0.01
-0.02
-0.03
-0.04
-0.02
-0.04
I
= 100 mA
O
V = 4 V
I
T
= 85°C
-0.06
-0.08
A
50
7.0
0
10
20
30
40
60
2.0
3.0
4.0
5.0
6.0
8.0
OUTPUT CURRENT in mA
INPUT VOLTAGE in VOLTS
Dwg. GP-053-15
Dwg. GP-052-15
OUTPUT VOLTAGE
3.5
3.0
2.5
2.0
V
O(nom)
V = 6 V
I
+0.01
I
= 0
O
V
O(nom)
-0.01
1.5
1.0
0.5
0
I
= 0 - 100 mA
O
-0.02
T
= 25°C
A
-50
0
+50
+100
4.0
0
1.0
2.0
3.0
AMBIENT TEMPERATURE in °C
INPUT VOLTAGE in VOLTS
Dwg. GP-050-3
Dwg. GP-059-2
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.
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000
8188
LOW-DROPOUT
REGULATORS
TYPICAL CHARACTERISTICS (cont’d)
QUIESCENT (GROUND TERMINAL) CURRENT
250
60
55
200
150
100
V
I
= 6 V
= 0
I
I
= 0
O
O
T
= 25°C
V
≥ 2 V
A
E
50
45
50
0
-2.0
V
+2.0
+4.0
+6.0
-50
0
+50
+100
O(nom)
INPUT VOLTAGE in VOLTS
AMBIENT TEMPERATURE in °C
Dwg. GP-058-1
Dwg. GP-051-3
DROPOUT VOLTAGE
0.25
0.20
T
= 85°C
= 25°C
A
T
A
T
= -20°C
A
0.15
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
8188
LOW-DROPOUT
REGULATORS
TYPICAL CHARACTERISTICS (concluded)
LOAD TRANSIENT PERFORMANCE
ENABLE TRANSIENT PERFORMANCE
VI = 3.2 V to 6.2 V, CO = 4.7 µF, TA = 25°C
VI = 3.2 V to 6.2 V, CO = 1 µF, TA = 25°C
+0.1 V
V
O(nom)
V
O(nom)
-0.1 V
15 µs
5 µs
V
O
0
<100 µs
<150 µs
V
0
100 mA
I
V
I
O
E
1 mA
Dwg. WP-027-3
Dwg. WP-028-2
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000
8188
LOW-DROPOUT
REGULATORS
A8188SL-xx
Dimensions in Inches
(for reference only)
8
0.0098
0.0075
0.1574
0.1497
0.2440
0.2284
0.050
0.016
0.020
0.013
1
0.050
BSC
0° TO 8°
0.1968
0.1890
0.0688
0.0532
Dwg. MA-007-8 in
0.0040 MIN.
Dimensions in Millimeters
(controlling dimensions)
8
0.25
0.19
4.00
3.80
6.20
5.80
1.27
0.40
0.51
0.33
1
1.27
BSC
0° TO 8°
5.00
4.80
1.75
1.35
Dwg. MA-007-8 mm
0.10 MIN.
NOTES: 1. Lead spacing tolerance is non-cumulative.
2. Exact body and lead configuration at vendor’s option within limits shown.
www.allegromicro.com
8188
LOW-DROPOUT
REGULATORS
A8188SLT-xx
Dimensions in Inches
(for reference only)
0.173
0.055
0.063
0.181
0.014
0.017
0.064
0.072
0.090
0.102
0.084
0.090
0.155
0.167
2
3
1
0.014
0.019
0.017
0.022
0.035
0.047
0.059
BSC
0.118
BSC
Dwg. MA-009-3 in
Dimensions in Millimeters
(controlling dimensions)
4.40
1.40
1.60
4.60
0.35
0.44
1.62
1.83
2.29
2.60
2.13
2.29
3.94
4.25
2
3
1
0.36
0.48
0.89
1.20
0.44
0.56
1.50
BSC
3.00
BSC
Dwg. MA-009-3 mm
NOTES: 1. Lead spacing tolerance is non-cumulative.
2. Exact body and lead configuration at vendor’s option within limits shown.
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000
8188
LOW-DROPOUT
REGULATORS
this page is intentionally left blank
www.allegromicro.com
8188
LOW-DROPOUT
REGULATORS
Allegro MicroSystems, Inc. reserves the right to make, from time to
time, such departures from the detail specifications as may be required
to permit improvements in the design of its products.
The information included herein is believed to be accurate and
reliable. However, Allegro MicroSystems, Inc. assumes no responsibil-
ity for its use; nor for any infringements of patents or other rights of
third parties which may result from its use.
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000
相关型号：
A8188SLT-25
Fixed Positive LDO Regulator, 2.5V, 0.3V Dropout, PSSO3, PLASTIC, TO-243AA, SOT-89, 3 PIN
SANKEN
A8188SLT-26
Fixed Positive LDO Regulator, 2.6V, 0.3V Dropout, PSSO3, PLASTIC, TO-243AA, SOT-89, SO-3
ALLEGRO
©2020 ICPDF网 联系我们和版权申明