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Part: ILC7280x2828
Category:
Description: Dual 0.15A Low Dropout Voltage Regulator
Company: Fairchild Semiconductor
Datasheet: Download ILC7280x2828 datasheet File size : 65 kB
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www.fairchildsemi.com
ILC7280
Micropower Dual 150mA CMOS RF LDOTM Regulators
Features
· · · · · · · · · · Low Power Consumption 150mV dropout at 150mA 1% output voltage accuracy Requires only 0.47µF output capacitor Only 135µA ground current at 150mA load 50µVRMS noise at BW = 300Hz to 50kHz Excellent line and load transient response Over current/Over temperature protection 8-pin MSOP package Voltage Options Available: 3.0/3.0V, 3.0/2.8V, 3.0/2.5V, 2.8/2.8V, 2.85/2.85V. Other custom values possible. · Minimum external components
General Description
The ILC7280 is two independent 150mA low dropout (LDO)voltage regulators in an 8-pin MSOP package. Each regulator output is independently short circuit protected and has independent enable lines. The device offers a unique combination of low dropout voltage and low quiescent current offered by CMOS technology as well as the low noise and good ripple rejection characteristics of bipolar LDO regulators.
Applications
· · · · Cellular Phones, pagers and wireless headsets Palmtops, organizers, PDAs and portable electronics Battery powered portable appliances and equipment Remote data accumulation and instrumentation
Block Diagram
VINA VOUTA
+ ENA Current Limit Thermal Shutdown
*CNOISE
Bandgap Reference
GND
Current Limit Thermal Shutdown ENB + VINB *Optional VOUTB
REV. 1.0.3 3/11/02
ILC7280
PRODUCT SPECIFICATION
Pin Configuration
VOUTA GND VOUTB CNOISE
(Optional) 1 2 3 4 8 7 6 5
VINA ENA VINB ENB
MSOP-8
Pin Definitions
Pin Number 1 2 3 4 5 6 7 8 Pin Name VOUTA GND VOUTB CNOISE ENA VINB ENB VINA Ground of the IC Output B.Regulated voltage Optional bypass for noise reduction. Digital Input Enable for regulator A Supply input B.Internally connected to pin 8* Digital Input Enable for regulator B Supply input B.Internally connected to pin 6* Pin Function Description Output A.Regulated voltage
*If maximum current is required from each regulator, then connect both pin 6 and 8 to power supply.
Absolute Maximum Ratings
Absolute maximum ratings are the values beyond which the device may be damaged or have its useful life impaired. Functional operation under these conditions is not implied. Parameter Supply Voltage: VINA or VINB to GND Voltage on all other pin to GND Junction Temperature Storage Temperature Lead Soldering Temperature, 10 seconds Power Dissipation at 85°C 0.3 65 65 Min. Max. 10 VIN + 0.3 150 150 300 315 Units V V °C °C °C mW
Recommended Operating Conditions
Parameter Supply Voltage VDD Output Current Ambient Operating Temperature Conditions VINA or VINB to GND IOUT -40 Min. VOUT + VDO Typ. VOUT + 1V Max. 9 150 85 Units V mA °C
2
REV. 1.0.3 3/11/02
PRODUCT SPECIFICATION
ILC7280
Electrical Specifications
(All values are for each regulator at VIN=VOUTnom+1V, IOUT=1mA, COUT=0.47µF, CN=0, VEN=2V and TA = +25°C using Test circuit in Figure 1, unless otherwise noted.) Parameter Output Voltage Dropout Voltage Line Regulation Load Regulation Ground Pin Current One Regulator ON IOUT = 10mA IOUT = 150mA VOUT + 1V VIN VOUT + 2V IOUT: 1mA to 150mA IOUT = 0mA IOUT = 10mA IOUT = 150mA Ground Pin Current Both Regulators ON IOUT = 0mA IOUT = 10mA IOUT = 150mA OFF State Current Enable Input Current Shut Down Input Voltage Output Voltage Noise Ripple Rejection Dynamic Line Regulation VEN = 0V VOUT = 2V VOUT = 0.6 High = Regulator ON Low = Regulator OFF COUT = 2.2µF, CN=1nF, IOUT = 10mA, BW = 300Hz to 50kHz COUT = 4.7µF, f = 120Hz COUT = 4.7µF, f = 1KHz VIN: VOUT + 1V to VOUT + 2V dV/dt = 1V/µS 50 50 45 20 10 mV mV 2 0.6 µVrms dB Conditions Min. 0.99 VOUTnom Typ. VOUTnom 5.5 155 0.2 0.3 80 85 95 120 125 135 150 4 0.2 220 10 0.5 V nA µA Max. 1.01 VOUTnom 7 180 0.5 0.75 105 110 125 µA %/V % µA Units V mV
Dynamic Load Regulation IOUT: 0 to 150mA DI/dt = 1A/µS
VOUTA COUT
VINA ENA VINB COUT CN
Figure 1. Test Circuit
VIN CIN
VOUTB
ENB
REV. 1.0.3 3/11/02
3
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