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FEATURES High Accuracy: ؎0.8% Ultralow Dropout Voltage: 120 mV @ 100 mA Typical Requires only CO = 0.47 F for Stability anyCAP™ = Stable with All Types of Capacitors Current and Thermal Limiting Low Noise Dropout Detector Multiple Voltage Options Thermally Enhanced SO-8 Package APPLICATIONS Cellular Telephones Notebook and Palmtop Computers Battery Powered Systems Portable Instruments High Efficiency Linear Regulators
High Precision anyCAP™ Dual Low Dropout Linear Regulator ADP3302
FUNCTIONAL BLOCK DIAGRAM (1/2 IS SHOWN)
ADP3302
OUT CC R1 IN THERMAL PROTECTION Q2 SD BANDGAP REF GND DRIVER Q1
ERR
GM R2
EOUT
2
GENERAL DESCRIPTION
330kΩ VOUT1 0.47µF
The ADP3302 is a member of the ADP330X family of precision micropower low dropout anyCAP™ regulators. The ADP3302 contains two fully independent 100 mA regulators with separate shutdown and merged error outputs. It features 1.4% overall output accuracy and very low, 120 mV typical, dropout voltage. The ADP3302 has a wide input voltage range from ؉3 V to ؉12 V. It features an error flag that signals when either of the two regulators is about to lose regulation. It has short circuit current protection as well as thermal shutdown. The ADP3302’s enhanced lead frame design allows for a maximum power dissipation of 630 mW @ +70°C ambient temperature and 1.0 W at room temperature without any external heat sink.
anyCAP™ is a trademark of Analog Devices, Inc.
VIN 0.47µF
ERR
5 8
IN IN
OUT1 1
ADP3302
3 GND
OUT2 4 SD2
6
VOUT2 0.47µF
SD1
7
ON OFF
Figure 1. Application Circuit
REV. 0
Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of Analog Devices. One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. Tel: 617/329-4700 World Wide Web Site: http://www.analog.com Fax: 617/326-8703 © Analog Devices, Inc., 1997
ADP3302–SPECIFICATIONS noted)
Parameter GROUND CURRENT GROUND CURRENT IN DROPOUT DROPOUT VOLTAGE Symbol IGND IGND VDROP
(@ TA = –20؇C to +85؇C, VIN = 7 V, CIN = 0.47 F, COUT = 0.47 F, unless otherwise
1
Conditions IL1 = IL2 = 100 mA IL1 = IL2 = 0.1 mA VIN = 2.5 V IL1 = IL2 = 0.1 mA VOUT ≤ 98% of VO, Nominal IL = 100 mA IL = 10 mA IL = 1 mA ON OFF 0 < VSD < 5 V 5 ≤ VSD ≤ 12 V, @ VIN = 12 V VSDI = VSD2 = 0, TA = +25°C, @ VIN =12 V VSDI = VSD2 = 0, TA = +85°C, @ VIN =12 V TA = +85°C, @ VIN = 12 V TA = +25°C, @ VIN = 12 V VEO = 5 V ISINK = 400 µA VIN = Nominal VOUT +1 V VIN = 12 V, IL = 100 mA T = 10 ms f = 10 Hz–100 kHz, @ TA = +25°C VOUT = 3.3 V VOUT = 5 V
Min
Typ 2 0.4 1.0
Max 4 0.8 2
Units mA mA mA
0.12 0.05 0.02 2.0 0.9 0.9 0
0.2 0.1 0.05 0.3 1 22 1 5 12 2 13
V V V V V µA µA µA µA µA µA µA V mA %/W
SHUTDOWN THRESHOLD SHUTDOWN PIN INPUT CURRENT GROUND CURRENT IN SHUTDOWN MODE
VTHSD ISDIN IQ
0
OUTPUT CURRENT IN SHUTDOWN MODE ERROR PIN OUTPUT LEAKAGE ERROR PIN OUTPUT “LOW” VOLTAGE PEAK LOAD CURRENT THERMAL REGULATION OUTPUT NOISE
IOSD IEL VEOL ILDPK
∆ VO VO
0.15 200 0.05
0.3
VNOISE
75 110
µV rms µV rms
NOTES 1 Ambient temperature of ؉85°C corresponds to a typical junction temperature of +125°C. Specifications subject to change without notice.
T = –20؇C to +85؇C, V = 3.3 V, C = 0.47 F, C ADP3302-3.0–SPECIFICATIONS (@ otherwise noted)
A IN IN
OUT
= 0.47 F, unless
Max 3.024 Units V
Parameter OUTPUT VOLTAGE
Symbol VOUT1 or VOUT2
Conditions VIN = 3.3 V to 12 V IL = 0.1 mA to 100 mA TA= +25°C VIN = 3.3 V to 12 V IL = 0.1 mA to 100 mA VIN = 3.3 V to 12 V TA = +25°C, IL = 0.1 mA IL = 0.1 mA to 100 mA TA = +25°C IL = 0.1 mA to 100 mA TA = +25°C
Min 2.976
Typ 3
2.958
3 0.024 0.030 1
3.042
V mV/V mV/mA µV/mA
LINE REGULATION LOAD REGULATION CROSS REGULATION
∆ VO ∆ V IN ∆ VO ∆I L ∆ V 01 ∆I L2 ∆ V 02 or ∆I L1
Specifications subject to change without notice.
–2–
REV. 0
ADP3302-3.2–SPECIFICATIONS
Parameter OUTPUT VOLTAGE Symbol VOUT1 or VOUT2
(@ TA = –20؇C to +85؇C, VIN = 3.5 V, CIN = 0.47 F, COUT = 0.47 F, unless otherwise noted)
Min 3.174 Typ 3.2 Max 3.226
ADP3302
Units V
Conditions VIN = 3.5 V to 12 V IL = 0.1 mA to 100 mA TA= +25°C VIN = 3.5 V to 12 V IL = 0.1 mA to 100 mA VIN = 3.5 V to 12 V TA = +25°C, IL = 0.1 mA IL = 0.1 mA to 100 mA TA = +25°C IL = 0.1 mA to 100 mA TA = +25°C
3.155
3.2 0.026 0.032 1
3.245
V mV/V mV/mA µV/mA
LINE REGULATION LOAD REGULATION CROSS REGULATION
∆ VO ∆ V IN
∆ VO ∆I L ∆ V 01 ∆I L2
or
Specifications subject to change without notice.
∆ V 02 ∆I L1
OUT = 0.47 F, unless
T = –20؇C to +85؇C, V = 3.6 V, C = 0.47 F, C ADP3302-3.3–SPECIFICATIONS (@ otherwise noted)
A IN IN
Parameter OUTPUT VOLTAGE
Symbol VOUT1 or VOUT2
Conditions VIN = 3.6 V to 12 V IL = 0.1 mA to 100 mA TA= +25°C VIN = 3.6 V to 12 V IL = 0.1 mA to 100 mA VIN = 3.6 V to 12 V TA = +25°C, IL = 0.1 mA IL = 0.1 mA to 100 mA TA = .