Dropout Positive Regulator DESCRIPTION AIC1085 dropout three
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AIC1085
Dropout Positive Regulator
DESCRIPTION
AIC1085 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 limiting thermal protection provides 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
AIC1085 10µF VOUT 3.3V
VREF VOUT VADJ 1.25V (typ.)
VOUT VREF (typ.)
needed device away from filter capacitors. required stability.
VREF 10µF
Adjustable Voltage Regulator
AIC1085-33
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-1085-02 012102
AIC1085
ORDERING INFORMATION
AIC1085-XXCXXX PACKING TYPE TAPE REEL TUBE PACKAGING TYPE TO-252 TO-263 TO-220 OUTPUT VOLTAGE DEFAULT: ADJUSTABLE 1.5V 1.8V 2.5V 3.3V Example: AIC1085-15CETR 1.5V version TO-252 Package Taping Reel Packing Type CONFIGURATION TO-252
VIEW (GND) VOUT (TAB)
TO-263
VIEW (GND) VOUT (TAB)
TO-220
FRONT VIEW (GND) VOUT (TAB)
ABSOLUTE MAXIMUM RATINGS
ADJ/ 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
TEST CIRCUIT
Refer TYPICAL APPLICATION CIRCUIT.
AIC1085
ELECTRICAL CHARACTERISTICS
specified)
=5V, TJ=25°C, IO=10mA, Unless otherwise
PARAMETER Reference Voltage ADJ)
TEST CONDITIONS AIC1085 (ADJ) =25°C AIC1085-15, AIC1085-18, AIC1085-25, AIC1085-33, ADJ: 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
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 (IADJ) Adjusted Current Change (IADJ) Temperature Stability
0.003
Minimum Load Current Output Noise VOUT)
Ripple Rejection Ratio
COUT=25 OUT)=3V
AIC1085
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.) -Power Ground. VOUT Adjustable output voltage. Power Input.
TYPICAL
PERFORMANCE CHARACTERISTICS
Output Voltage (mV,
IN=5V COUT (Tantalum) OUT=3.3V
Output Voltage
0.05
-0.05 -0.1
-100
CIN=1V (Tantalum) COUT =10µ (Tantalum) VOUT=3.3V
Input Voltage
Load Current
1.5A
0.1A
Time (µS)
Fig. Load Transient Response
Time (µS) Fig. Line Transient Response
AIC1085
TYPICAL PERFORMANCE CHARACTERISTICS (Continued)
1.22 1.20 1.18 1.16 1.14 1.12 1.10 1.08 1.06
Minimum Operating Current (mA)
Minimum Differential Voltage
Output Current Fig. Dropout Voltage (VOUT=3.3V)
Differential Voltage Fig. Minimum Operating Current
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
AIC1085
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
TO-252 (unit:
SYMBOL
2.19 1.02 0.64 5.21 0.46 5.33 6.35
2.38 1.27 0.88 5.46 0.58 5.59 6.73
2.28 (TYP.) 9.40 0.51 10.42
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