Dropout Positive Regulator Dropout Voltage 1.5V Output Current. F
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AIC1084
Dropout Positive Regulator
Dropout Voltage 1.5V 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.
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 1.5V 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.
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 (Note1)
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
(Note1)
Fixed Voltage Regulator
Analog Integrations Corporation Si-Soft Research Center 3A1, No.1, Li-Hsin Science Park Hsinchu 300, Taiwan R.O.C. TEL: 886-3-5772500 FAX: 886-3-5772510 www.analog.com.tw DS-1084G-01 073108
AIC1084
ORDERING INFORMATION
AIC1084-XXXXXX PACKING TYPE TUBE TAPING REEL PACKAGING TYPE TO-252 TO-263 TO-220 COMMERCIAL LEAD FREE COMMERCIAL GREEN PACKAGE OUTPUT VOLTAGE DEFAULT: ADJUSTABLE 1.5V 1.8V 2.5V 3.3V (1.5V version available under request) Example: AIC1084-18CETR 1.8V version TO-252 Package Taping Reel Packing Type Example: AIC1084-18PMTR 1.8V version TO-263 Lead Free 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/GND Ambient Temperature Range Maximum Junction Temperature Storage Temperature Range Lead Temperature (Soldering) sec. Thermal Resistance Junction Case TO-252 TO-263, TO-220 Thermal Resistance Junction Ambient TO-252 TO-220 (Assume ambient airflow, heatsink) TO-263 -40°C 85°C 125°C -65°C 150°C 260°C 12.5°C/W 3°C/W 100°C/W 60°C/W 50°C/W
Absolute Maximum Ratings those values beyond which life device impaired.
AIC1084
TEST CIRCUIT
Refer TYPICAL APPLICATION CIRCUIT.
ELECTRICAL CHARACTERISTICS
(VIN=5V, TJ=25°C, IO=10mA, unless otherwise specified) (Note2) PARAMETER Reference Voltage TEST CONDITIONS AIC1084 (ADJ) AIC1084-15, VIN=5V AIC1084-18, VIN=5V AIC1084-25, VIN=5V AIC1084-33, VIN=5V 2.75V VOUT=1.25V VOUT+1.5V Load Regulation Dropout Voltage Current Limit Current (Fix) Adjusted Current Adjusted Current Change (IADJ) Temperature Stability Minimum Load Current Output Noise VOUT) Ripple Rejection Ratio Thermal Shutdown Temperature 10Hz 10KHz 120Hz input ripple COUT=25µF (VIN -VOUT)=3V Note VOUT+1.5V 2.75V 2.75V IO=0.5A 10mA VOUT, VREF=1% 10mA 11.5 0.003 MIN. 1.225 1.47 1.76 2.45 3.23 TYP. 1.25 1.50 1.80 2.50 3.30 0.015 MAX. 1.275 1.53 1.84 2.55 3.37 UNIT
Output Voltage
Line Regulation
Note avoid output oscillation, aluminum electrolytic output capacitor recommended ceramic capacitor suggested. Note Specifications production tested TA=25°C. Specifications over -40°C 85°C operating temperature range assured design, characterization correlation with Statistical Quality Controls (SQC). Note Guarantee design.
AIC1084
TYPICAL PERFORMANCE CHARACTERISTICS
Output Voltage (mV,
-100
Input Voltage
CIN=1µF (Tantalum) COUT=10µF (Tantalum) VOUT=3.3V
Fig.
1.35 1.30 1.25
Load Transient Response
Fig.
Time (µS) Line Transient Response
Minimun Operating Current (mA)
AIC1084-25 (TJ=25)
AIC1084
Dropout Voltage
1.20 1.15 1.10 1.05 1.00 0.95 0.90
Output Current
Fig. Dropout Voltage (VOUT=2.5)
VIN-V Fig. Minimum Operating Current
Minimum Operating Current (mA)
AIC1084-18
Shot Circuit Current
Differential Voltage
Fig. Minimum Operating Current
VIN-VOUT Fig. AIC1084 (1.8) Short Circuit Current
AIC1084
TYPICAL PERFORMANCE CHARACTERISTICS
(Continued)
Ripple Rejection Ratio (dB)
COUT=3.3µF
COUT=10µF
COUT=25µF
Frequency (Hz)
Fig.
AIC1084 (ADJ.) Ripple Rejection
BLOCK DIAGRAM
VREF 1.25V
Current Amp.
Thermal Limit 55µA
Current Limit VOUT fixed voltage device
DESCRIPTIONS
Providing VREF=1.25V (typ.) adjustable VOUT. VREF=VOUT-VADJ IADJ=55µA (typ.) (GND PIN- Power ground.) VOUT Adjustable output voltage. Power Input.
AIC1084
APPLICATION INFORMATION
INPUT-OUTPUT CAPACITORS Linear regulators require input output capacitors maintain stability. Input capacitor 10µF with 10µF aluminum electrolytic output capacitor recommended. POWER DISSIPATION AIC1084 obtains thermal-limiting circuitry, which designed protect device against overload condition. continuous load condition, maximum rating junction temperature must exceeded. important more attention thermal resistance. includes junction case, junction ambient. maximum power dissipation AIC1084 depends thermal resistance case circuit board, temperature difference between junction ambient air, rate airflow. rate temperature rise greatly affected mounting configuration PCB, board material, ambient temperature. When mounting with good thermal conductivity used, junction temperature will even when large power dissipation applies. power dissipation across device IOUT (VIN-VOUT). maximum power dissipation
PMAX (TJ-max
Where TJ-max maximum allowable junction temperature (125°C), ambient temperature suitable application. general rule, lower temperature better reliability device mounting should provide maximum thermal conductivity maintain device temperature.
APPLICATION EXAMPLES
AIC1084
Vout
3.3V
AIC1084
Vout 3.3V
10µF
10µF Cadj
10µF
100µF
MMBT2222A
Cadj improve ripple rejection
Fig. VOUT=3.3V with Shutdown
Vout 1.25V
Fig. Improving Ripple Rejection
10µF
AIC1084
AIC1084-33
100µF
10µF
10µF FLOATING INPUT
Vout -3.3V
Fig. VOUT=1.25V Application Circuit
Fig. Dropout Negative Supply
AIC1084
PHYSICAL DIMENSIONS
TO-220 (unit:
TO-220 MILLIMETERS MIN. 3.56 0.51 2.04 0.38 1.15 0.35 14.23 8.38 9.66 2.54 5.85 12.70 -3.54 2.54 6.85 14.73 6.35 4.08 3.42 MAX. 4.82 1.39 2.92 1.01 1.77 0.61 16.51 9.02 10.66
WITH PLATING
BASE METAL SECTION
Note: 1.Refer JEDEC TO-220AB. 2.Controlling dimension millimeter, converted inch dimensions necessarily exact.
AIC1084
TO-252 (unit:
TO-252-3L MILLIMETERS MIN. 2.19 0.00 0.64 4.95 0.46 0.46 5.33 6.35 2.28 9.40 1.40 2.67 0.51 0.89 2.03 1.02 10.41 1.78 MAX. 2.38 0.13 0.89 5.46 0.61 0.89 6.22 6.73
VIEW
WITH PLATING
BASE METAL SECTION
GAUGE PLANE SEATING PLANE
VIEW
Note: 1.Refer JEDEC TO-252AA 2.Dimension include mold flash, protrusions gate burrs. Mold flash, protrusion gate burrs shall exceed side. 3.Controlling dimension millimeter, converted inch dimensions necessarily exact.
AIC1084
TO-263 (unit:
TO-263-3L MILLIMETERS MIN. 4.06 0.00 0.51 1.14 0.38 1.14 8.38 9.65 2.54 14.61 1.78 -0.25 15.88 2.79 1.68 1.78 MAX. 4.83 0.25 0.99 1.78 0.74 1.65 9.65 10.67
VIEW
WITH PLATING
BASE METAL SECTION
GAUGE PLANE
SEATING PLANE
Note: 1.Refer JEDEC TO-263AB. 2.Controlling dimension millimeter, converted inch dimensions necessarily exact.
Note: Information provided believed accurate reliable. However, cannot assume responsibility circuitry other than circuitry entirely embodied product; infringement patents other rights third parties that result from use. reserve right change circuitry specifications without notice. Life Support Policy: does authorize product life support devices and/or systems. Life support devices systems devices systems which, intended surgical implant into body (ii) support sustain life, whose failure perform, when properly used accordance with instructions provided labeling, reasonably expected result significant injury user.
VIEW
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