DESCRIPTION AIC1084 dropout three terminal regulator with output
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AIC1084 Dropout Positive Regulator
DESCRIPTION
AIC1084 dropout three terminal regulator with output current capability. output voltage adjustable with resistor divider fixed 1.5V, 1.8V, 2.5V 3.3V. Dropout voltage guaranteed maximum 1.4V with maximum output current. dropout voltage fast transient response make ideal voltage microprocessor applications. Current limit thermal protection provide protection against overload condition that would create excessive junction temperatures.
Dropout Voltage 1.3V Output Current. Fast Transient Response. Extremely Tight Line Load Regulation. Current Limiting Thermal Protection. Adjustable Output Voltage Fixed 1.5V, 1.8V, 2.5V, 3.3V. Standard 3-Pin Power Packages.
APPLICATIONS
Mother Board Power Supplies. Microprocessor Power Supplies. High Current Regulator. Post Regulator Switching Supply.
TYPICAL APPLICATION CIRCUIT
AIC1084 10µF VREF VOUT 3.3V
10µF
VREF =VOUT -VADJ=1.25V (typ.) VOUT=VREF (1+RF2/RF1)+ IADJ IADJ=55µA (typ.) needed device away from filter capacitors. required stability.
Adjustable Voltage Regulator
AIC1084-33
VOUT 3.3V
10µF
10µF
Fixed Voltage Regulator
Analog Integrations Corporation Industry Science-Based Industrial Park, Hsinchu, Taiwan TEL: 886-3-5772500 FAX: 886-3-5772510 www.analog.com.tw DS-1084-04 012502
AIC1084
ORDERING INFORMATION
AIC1084-XXCXXX PACKING TYPE TUBE TAPING REEL PACKAGING TYPE TO-252 TO-263 TO-220 OUTPUT VOLTAGE DEFAULT: ADJUSTABLE 1.5V 1.8V 2.5V 3.3V CONFIGURATION
TO-252 VIEW (GND) VOUT (TAB)
TO-263 VIEW (GND) VOUT (TAB)
TO-220 FRONT VIEW (GND) VOUT (TAB)
Example: AIC1084-15CETR 1.5V version TO-252 Package Taping Reel Packing Type
ABSOLUTE MAXIMUM RATINGS
ADJ/GND Operating Junction Temperature Range Storage Temperature Range Thermal Resistance Junction Case TO-252 TO-263, TO-220 Thermal Resistance Junction Ambient TO-252 TO-220 Lead Temperature (Soldering) sec. (Assume ambient airflow, heatsink) TO-263 0°C~ 125°C 65°C 150°C 12.5°C/W 100°C/W 60°C 50°C 260°C
AIC1084
TEST CIRCUIT
Refer TYPICAL APPLICATION CIRCUIT.
ELECTRICAL CHARACTERISTICS
specified)
=5V, TJ=25°C, IO=10mA, Unless otherwise
PARAMETER Reference Voltage
TEST CONDITIONS AIC1084 (ADJ) =25°C AIC1084-15, AIC1084-18, AIC1084-25, AIC1084-33, 2.65V VOUT=1.25V VOUT+1.4V =25°C 10mA =25°C VOUT, VREF 10mA 125°C 125°C 2.65V 2.65V 125°C IO=0.5A 125°C 125°C 10Hz 10KHz 120Hz input ripple COUT=25µF OUT)=3V
MIN. 1.238 1.48 1.78 2.47 3.26
TYP. 1.25 1.50 1.80 2.50 3.30
MAX. 1.262 1.52 1.82 2.53 3.34
UNIT
Output Voltage
Line Regulation
0.015
Load Regulation
Dropout Voltage Current Limit Adjusted Current Adjusted Current Change (IADJ) Temperature Stability Minimum Load Current Output Noise VOUT) Ripple Rejection Ratio
0.003
AIC1084
BLOCK DIAGRAM
1.25V
Current Amp.
Thermal Limit 55µA
Current Limit VOUT fixed voltage device
DESCRIPTIONS
Providing VREF=1.25V (typ.) adjustable VOUT. VREF=VOUT-V IADJ=55µA (typ.) PIN- Power ground. VOUT Adjustable output voltage. Power Input.
TYPICAL
Output Voltage
-0.2 -0.4
PERFORMANCE CHARACTERISTICS
Output Voltage (mV,
Input Voltage
Load Current
=5.0V CIN=1µF(Tantalum) COUT =10µF(Tantalum) VOUT=3.3V
-100
CIN=1µF (Tantalum) COUT =10µF (Tantalum) VOUT=3.3V
2.5A
0.1A
Fig.
Time (µS) Load Transient Response
Fig.
Time (µS) Line Transient Response
AIC1084
TYPICAL
1.35
PERFORMANCE CHARACTERISTICS
Minimum Operating Current (mA)
(Continued)
Minimum differential Voltage
1.30
1.25
1.20
1.15
1.10
1.05
Fig.
Output Current Dropout Voltage OUT=3.3V)
Differential Voltage Fig. Minimum Operating Current
Minimum Operating Current (mA)
Short Circuit Current
Differential Voltage Fig. Minimum Operating Current
VIN-V
Fig. AIC1084 (ADJ.) Short Circuit Current
Ripple Rejection Ratio (dB)
OUT=3.3µF
COUT=10µF
OUT=25µF
Frequency (Hz)
Fig.
AIC1084 (ADJ.) Ripple Rejection
AIC1084
PHYSICAL DIMENSIONS
TO-220 (unit:
3.81±0.27
SYMBOL
3.56 14.23 9.66 2.29 0.50 0.51 2.04 12.70
4.82 16.51 10.66 2.79 1.15 1.10 1.39 2.92 14.73
TO-252 (unit:
SYMBOL
2.19 1.02 0.64 5.21 0.46 5.33 6.35 2.28 (TYP.) 9.40 0.51
2.38 1.27 0.88 5.46 0.58 5.59 6.73
10.42
AIC1084
TO-263 (unit:
SYMBOL
4.06 0.50 1.14 1.14 8.63 9.65
4.83 1.00 1.40 1.40 9.66 10.29
2.54 (TYP.) 14.60 2.28 15.88 2.80 1.40
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