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Part: A8233S-45
Category:
Power Management
-> Regulators
-> Linear Voltage Regulators
-> Fixed
Description:
Company: Allegro Micro Systems, Inc.
Datasheet: Download A8233S-45 datasheet File size : 722 kB
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Datasheet text preview:
8220 THRU 8233
PRELIMINARY INFORMATION
(subject to change without notice) January 18, 2000
LOW-DROPOUT REGULATORS -- HIGH EFFICIENCY
Designed specifically to meet the requirement for extended operation of battery-powered equipment such as cordless and cellular telephones, the A8220SLH thru A8233SLH 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 100 mA (transient), which is limited only by package power dissipation. Regulated output voltages of 2.6, 2.7, 2.8, 2.9, 3.0 and 3.3 are currently provided. Other voltages, down to 2.0 volts, are available on special order. A PMOS pass element provides a typical dropout voltage of only 125 mV at 50 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 approached, 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 A8220SLH thru A8233SLH include ENABLE inputs to give the designer complete control over power up, standby, or power down. These devices are supplied in a thermally enhanced 5-lead smalloutline plastic package similar to the SOT-23, and fitting the SC-74A footprint. All devices are rated for operation over a temperature range of -20°C to +85°C.
Data Sheet 27468.11
A82xxSLH
NO CONNECT
ABSOLUTE MAXIMUM RATINGS
Input Voltage, VI . . . . . . . . . . . . . . . 7 V Peak Output Current, IOM . . . . . . . . . . . . . . . . . . 100 mA* Enable Input Voltage, VE . . . . . . . . . . VI Operating Temperature Range, TA . . . . . . . . . . . . . -20°C to +85°C Junction Temperature, TJ . . . . +150°C Storage Temperature Range, TS . . . . . . . . . . . . -40°C to +150°C
* Output current rating is limited by input voltage, duty cycle, and ambient temperature. Under any set of conditions, do not exceed a junction temperature of +150°C. See following pages.
T C UY DL ON RO PE DC EN UE IN ER TF NE OR CR IS O DF --
5 4
NC
VR
1
2
ENABLE
GND
Dwg. PS-021-4
IN
OUT
3
FEATURES AND BENEFITS
I High Efficiency Provides Extended Battery Life I 125 mV Typical Dropout Voltage at IO = 50 mA I 32 µA Typical Quiescent Current Less Than 1 µA "Sleep" Current I Low Output Noise I 100 mA Peak Output Current I Improved PSRR and Transient Performance
APPLICATIONS
I I I I
Cordless and Cellular Telephones Personal Data Assistants Personal Communicators Palmtop Computers
Always order by complete part number, e.g., A82xxSLH , where "xx" is the required output voltage in tenths.
8220 THRU 8233 LOW-DROPOUT REGULATORS
FUNCTIONAL BLOCK DIAGRAM
IN
3
4
OUT
BIAS
DRIVE
ERROR AMP
ENABLE
1
ENABLE
BANDGAP REF.
2
GND
Dwg. FS-012-9
A82xxSLH Maximum Allowable 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 25°C 50°C 70°C 85°C 1.5 100 100 100 100 2.0 100 100 100 100 2.5 100 100 100 100 3.0 100 100 100 98 3.5 100 100 100 84 4.0* 100 100 91 74 4.5* 100 100 81 66
* Absolute maximum peak output current rating is 100 mA; absolute maximum input voltage is 7 V. IO = (TJ TA)/([VI VO] RJA x dc) = (150 TA)/([VI VO] x 220 x 1.00) Output current rating can be increased (to 100 mA maximum) by additional heat sinking or reducing the duty cycle.
115 Northeast Cutoff, Box 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000 Copyright © 2000, Allegro MicroSystems, Inc.
8220 THRU 8233 LOW-DROPOUT REGULATORS
ELECTRICAL CHARACTERISTICS at TA = +25°C, VE 2.0 V (unless otherwise noted).
Limits Characteristic Output Voltage (reference specified VO(nom)) Output Volt. Temp. Coeff. Line Regulation Load Regulation Dropout Voltage Ground Terminal Current aVO VO(VI) VO(IO) VImin - VO I GND IQ ENABLE Input Voltage V EH VEL ENABLE Input Current Rejection Ratio IE PSRR Symbol VO Test Conditions 4 V VI 7 V, 10 µA IO 50 mA* VI = VO(nom), IO = 50 mA VI = 6 V, IO = 10 mA, TJ 125°C 4 V VI 7 V, IO = 1 mA 1 mA IO 50 mA*, 4 V VI 7 V IO = 50 mA VI < 7 V, IO 50 mA VI 7 V, VE 0.8 V, IO = 0 mA 4 V VI 7 V, Output ON 4 V VI 7 V, Output OFF VE = VI = 7 V VI = VO(nom) + 1.5 V, Vi = 100 mV, IO = 10 mA, f = 1 kHz f = 10 kHz 10 Hz f 100 kHz, IO = 10 mA, CO = 10 µF Min. -0.05 -- -- -- -- -- -- -- 2.0 -- -- Typ. 0.00 -- -0.20 3.0 -- 125 32 -- -- -- -- Max. +0.05 -0.25 -- 10 20 250 45 1.0 -- 0.8 ±1.0 Units V V mV/°C mV mV mV µA µA V V µA
-- -- --
70 52 0.5
-- -- --
dB dB µV/Hz
Output Noise
en
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.
www.allegromicro.com
8220 THRU 8233 LOW-DROPOUT REGULATORS
TYPICAL CHARACTERISTICS
LOAD REGULATION
+0.06
+0.03 TA = -20°C 25 mA INTERVALS
LINE REGULATION
+0.04
+0.02
OUTPUT VOLTAGE in VOLTS
+0.02
OUTPUT VOLTAGE in VOLTS
+0.01 I O = 0 mA
VO(nom) -0.02
VI = 4 V
V
O(nom)
-0.01
I = 50 mA
O
VI = 7 V -0.04 TA = -20°C
-0.02
-0.06
-0.03
-0.08 0 10 20 30 40 50 60
Dwg. GP-052-16
-0.04 2.0 3.0 4.0 5.0 6.0 7.0 8.0
Dwg. GP-053-17
OUTPUT CURRENT in mA
INPUT VOLTAGE in VOLTS
+0.06
+0.03 TA = 25°C 25 mA INTERVALS
+0.04
+0.02
OUTPUT VOLTAGE in VOLTS
+0.02 VI = 7 V
OUTPUT VOLTAGE in VOLTS
+0.01 IO = 0 mA V
O(nom)
V O(nom) -0.02
-0.01
IO = 50 mA
V =4V -0.04 TA = 25°C
I
-0.02
-0.06
-0.03
-0.08 0 10 20 30 40 50 60
Dwg. GP-052-17
-0.04 2.0 3.0 4.0 5.0 6.0 7.0 8.0
Dwg. GP-053-18
OUTPUT CURRENT in mA
INPUT VOLTAGE in VOLTS
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
8220 THRU 8233 LOW-DROPOUT REGULATORS
TYPICAL CHARACTERISTICS (cont'd)
LOAD REGULATION
+0.06
+0.03
LINE REGULATION
+0.04
+0.02
OUTPUT VOLTAGE in VOLTS
TA = 85°C
OUTPUT VOLTAGE in VOLTS
+0.02
+0.01 IO = 0 mA V
O(nom)
V
O(nom)
VI = 7 V VI = 6 V
-0.02
-0.01
IO = 60 mA
-0.04 VI = 4 V -0.06 TA = 85°C
-0.02
-0.03
-0.08 0 10 20 30 40 50 60 OUTPUT CURRENT in mA
Dwg. GP-052-15
-0.04 2.0 3.0 4.0 5.0 6.0 7.0 8.0
Dwg. GP-053-16
INPUT VOLTAGE in VOLTS
OUTPUT VOLTAGE
3.5
3.0
OUTPUT VOLTAGE in VOLTS
+0.02
OUTPUT VOLTAGE in VOLTS
V O(nom)
2.5
+0.01
2.0
VO(nom) -0.01 VI = 6 V IO = 0
1.5 I O = 0 - 50 mA TA = 25°C
1.0
-0.02
0.5
0 0 1.0 2.0 3.0 INPUT VOLTAGE in VOLTS
4.0
-50
0
+50
+100
Dwg. GP-050-4
AMBIENT TEMPERATURE in °C
Dwg. GP-059-3
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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