Document
AIC1221
Ultra LDO 2A Linear Regulator With Adjustable & Bypass Pin
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FEATURES
Guaranteed 2A Output Current. Fast Response in Line/Load Transient. Wide Operating Voltage Ranges: 1.8V to 6V. 0.01µA Shutdown Standby Current. Low Quiescent Current: 30µA. Fixed: 1.8V, 2.5V, 3.3V, 5V Output Voltage. Adjustable Output Voltage are available from 0.8~5.5V. Low Dropout : 550mV at 2A and 3.3V output voltage, 480mV at 2A and 5V output voltage. High PSRR:70dB at 1kHz. Active Low or High Shutdown Control. Current Limit and Thermal Protection. Available in ±2% Output Tolerance. Available in SOT-223 & TO-252 (3 & 5 pin) and SOP-8 Package.
DESCRIPTION
A low noise, high PSRR and ultra low dropout linear regulator AIC1221 is optimized for low ESR ceramic capacitors operation with 2A continuous current. The AIC1221 is designed for portable and wireless devices with demanding performance and space requirements. The AIC1221 offers high precision output voltage of ±2% tolerance. Output voltage can also be adjusted for those other than the preset values. A noise bypass pin is available for further reduction of output noise. The bypass pin could be floating if it’s unnecessary. At 2A load current and 5V output voltage, a 480mV dropout is performed. The quality of low quiescent current and low dropout voltage makes this device ideal for battery power applications. The high ripple rejection and low noise of the AIC1221 provide enhanced performances for critical applications In addition, a logic-level shutdown input is included, which reduce supply current to 0.01µA (typ.) in shutdown mode with fast turn-on time less than 100µs. The AIC1221’s current limit and thermal protection provide protection against any overload condition that would create excessive junction temperatures.
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APPLICATIONS
LCD TV, LCD Monitor, DPF Networking STB DVD, HDD Driver Portable AV Equipment PC Peripherals
TYPICAL APPLICATION CIRCUIT
AIC1221AL-50
AIC1221-33 Vin Cin 4.7uF 1 VIN GND 2 Cout 4.7uF VOUT 3 Vout 3.3V
Vin EN Cin 4.7uF
2 1
VIN EN/EN GND 3
VOUT ADJ
4 5 R1 446k R2 120k
Vout 3.3V
Cout 4.7uF
Fixed Linear Regulator
Adjustable Linear Regulator
Analog Integrations Corporation
Si-Soft Research Center 3A1, No.1, Li-Hsin Rd. I, Science Park, Hsinchu 300, Taiwan, R.O.C. TEL: 886-3-5772500, FAX: 886-3-5772510 www.analog.com.tw
DS-1221G-01 20100427
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Free Datasheet http://www.datasheet4u.com/
AIC1221
TYPICAL APPLICATION CIRCUIT
EN Vin Vout 3.3V Cin 4.7uF Cout 4.7uF 1 2 3 R1 446k R2 120k 4
(Continued)
EN/EN VIN VOUT ADJ GND PGOOD BP GND 8 7 6 5 Cbp 22nF
AIC1221H-33
RG 100k
Adjustable Linear Regulator in SOP-8 Package
ORDERING INFORMATION
AIC1221-XXXXX XX PACKING TYPE TR: TAPE & REEL TB: TUBE PACKAGE TYPE Y3: SOT-223 E3: TO-252 G: Green Package OUTPUT VOLTAGE 18: 1.8V 25: 2.5V 33: 3.3V 50: 5.0V (Of a unit of 0.1V within 0.8~5.5V, additional voltage versions are available on demand) 3 PIN CONFIGURATION SOT-223 (Y3) TOP VIEW 1: VIN 2: GND (TAB) 3: VOUT
1 2 3
TO-252 (E3) TOP VIEW 1: VIN 2: GND (TAB) 3: VOUT
1 2 3
Example:
AIC1221-18GY3TR Æ 1.8V Version, in SOT-223 Green Package & Tape & Reel Packing Type
Example:
AIC1221-18GE3TR Æ 1.8V Version, in TO-252 Green Package & Tape & Reel Packing Type
2
Free Datasheet http://www.datasheet4u.com/
AIC1221
ORDERING INFORMATION
AIC1221XX-XXXXXXXX PACKING TYPE TR: TAPE & REEL TB: TUBE
(Continued)
5 PIN CONFIGURATION TO-252-5 (E5) TOP VIEW 1: EN / EN 2: VIN 3: GND (TAB) 4: VOUT 5: BP/ADJ TO-252-5 (E5T) TOP VIEW 1: EN / EN 2: VIN 3: GND (TAB) 4: VOUT 5: NC
12 34 5 1 23 45
PACKAGE TYPE E5: TO-252-5 E5T: TO-252-5 G: Green Package OUTPUT VOLTAGE 18: 1.8V 25: 2.5V 33: 3.3V 50: 5.0V (Of a unit of 0.1V within 0.8~5.5V, additional voltage versions are available on demand) ENABLE TYPE L: Chip Enable Low H: Chip Enable High B: Bypass A: ADJ (For E5 package only) Example: AIC1221BH-18GE5TR
Æ With Bypass Pin, Chip Enable High, 1.8V Version, in TO-252-5 Green Package & Tape & Reel Packing Type Example: AIC1221H-18GE5TTR Æ Chip Enable High, 1.8V Version, in TO-252-5 Green Package & Tape & Reel Packing Type
3
Free Datasheet http://www.datasheet4u.com/
AIC1221
ORDERING INFORMATION
AIC1221X-XXXXXX XX PACKING TYPE TR: TAPE & REEL TB: TUBE
(Continued)
8 PIN CONFIGURATION SOP-8 (R8) Exposed Pad (Heat Sink) TOP VIEW
1 2 3 4
1: EN / EN 2: VIN 3: VOUT PACKAGE TYPE R8: SOP-8 Exposed Pad (Heat Sink) 4: ADJ 5: GND (TAB) 6: BP G: Green Package 7: PG 8: GND (TAB) OUTPUT VOLTAGE 18: 1.8V 25: 2.5V 33: 3.3V 50: 5.0V (Of a unit of 0.1V within 0.8~5.5V, additional voltage versions are available on demand) ENABLE TYPE L: Chip Enable Low H: Chip Enable High
.
GND
8 7 6 5
Example:
AIC1221H-18GR8TR Æ Chip Enable High, 1.8V Version, in SOP-8 Exposed Pad (Heat Sink) Green Package & Tape & Reel Packing Type
4
Free Datasheet http://www.datasheet4u.com/
AIC1221
ABSOLUTE MAXIMUM RATINGS
Input Voltage ............................................................