CS52015-3
CS52015-3
1.5A, 3.3V Fixed Linear Regulator
Description
The CS52015-3 linear regulator provides 1.5A at 3.3V with an output voltage accuracy of ±1.5%. The regulator is intended for use as a post regulator and microprocessor supply. The fast loop response and low dropout voltage make this regulator ideal for applications where low voltage operation and good transient response are important. The circuit is designed to operate with dropout voltages less than 1.4V at 1.5A output current. The maximum quiescent current is only 10mA at full load. Device protection includes overcurrent and thermal shutdown. The CS52015-3 is pin compatible with the LT1086 family of linear regulators but has lower dropout voltage. The regulator is available in TO220, surface mount D2, and SOT-223 packages.
Features
s Output Current to 1.5A s Output Accuracy to ±1.5% Over Temperature s Dropout Voltage (typical) 1.05V @ 1.5A s Fast Transient Response s Fault Protection Current Limit Thermal Shutdown
Application Diagram
Package Options
3L TO-220 3L D2PAK
Tab (VOUT)
VIN
VOUT CS52015-3
Gnd
22mF 5V
3.3V @ 1.5A
Tab (VOUT)
1
10 mF 5V
1
3L SOT-223
Tab (VOUT)
CS52015 -3 1 Gnd 2 VOUT (tab) 3 VIN
1
Consult factory for other fixed output voltage options.
Cherry Semiconductor Corporation 2000 South County Trail, East Greenwich, RI 02818 Tel: (401)885-3600 Fax: (401)885-5786 Email:
[email protected] Web Site: www.cherry-semi.com
Rev. 2/17/98
1
A
¨
Company
CS52015-3
Absolute Maximum Ratings Supply Voltage, VIN .....................................................................................................................................................................7V Operating Temperature Range................................................................................................................................-40¡C to 70¡C Junction Temperature ............................................................................................................................................................150¡C Storage Temperature Range ..................................................................................................................................-60¡C to 150¡C Lead Temperature Soldering Wave Solder (through hole styles only) .....................................................................................10 sec. max, 260¡C peak Reflow (SMD styles only) ......................................................................................60 sec. max above 183¡C, 230¡C peak ESD Damage Threshold............................................................................................................................................................2kV
Electrical Characteristics: CIN = 10µF, COUT = 22µF Tantalum, VOUT + VDROPOUT < VIN < 7V, 0¡C ² TA ² 70¡C, TJ ² +150¡C,
unless otherwise specified, Ifull load = 1.5A. PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
s Fixed Output Voltage Output Voltage (Notes 1 and 2) Line Regulation Load Regulation (Notes 1 and 2) Dropout Voltage (Note 3) Current Limit Quiescent Current Thermal Regulation (Note 4) Ripple Rejection (Note 4) Thermal Shutdown (Note 5) Thermal Shutdown Hysteresis (Note 5) VINÐVOUT=1.5V 0²IOUT²1.5A 2V²VINÐVOUT²3.7V; IOUT=10mA VINÐVOUT=2V; 10mA ²IOUT²1.5A IOUT=1.5A VINÐVOUT=3V IOUT=10mA 30ms pulse; TA=25¡C f=120Hz; IOUT=1.5A; VINÐVOUT=3V; VRIPPLE=1VP-P 150 1.6 3.250 (-1.5%) 3.300 0.02 0.04 1.05 3.1 5.0 0.002 80 180 25 210 10.0 0.020 3.350 (+1.5%) 0.20 0.4 1.4 V % % V A mA %/W dB ¡C ¡C
Note 1: Load regulation and output voltage are measured at a constant junction temperature by low duty cycle pulse testing. Changes in output voltage due to temperature changes must be taken into account separately. Note 2: Specifications apply for an external Kelvin sense connection at a point on the output pin 1/4Ó from the bottom of the package. Note 3: Dropout voltage is a measurement of the minimum input/output differential at full load. Note 4: Guaranteed by design, not tested in production. Note 5: Thermal shutdown is 100% functionally tested in production.
Package Pin Description
PACKAGE PIN # PIN SYMBOL FUNCTION
D2PAK 1 2 3
TO-220 1 2 3
SOT-223 1 2 3 Gnd VOUT VIN Ground connection Regulated output voltage (case). Input voltage
2
CS52015-3
Block Diagram
V OUT V IN
Output Current Limit Thermal Shutdown + Error Amplifier
Bandgap Gnd
Typical Performance Characteristics
1.05
0.10 0.08 Output Voltage Deviation (%)
1.00 V Drop Out (V)
TCASE 0ûC
0.06 0.04 0.02 0.00 -0.02 -0.04 -0.06 -0.08 -0.10 -0.12 0 10 20 30 40 50 60 70 80 90 100 110 120 130
0.95 TCASE 25ûC 0.90
0.85
0.80
TCASE 125ûC
0.75 0 300 600 IOUT (mA) 900 1200 1500
TJ (°C)
Dropout Voltage vs Output Current
Output Voltage vs. Temperature
85 75
Ripple Rejection (dB)
3.5 3.3 3.1
65 55 45 35 25 15
101 102 103 104 105 106 Frequency (Hz)
2.9 2.7
TCASE = 25°C IOUT = 1.5A (VIN Ð VOUT) = 3V VRIPPLE = 1.0VPP
ISC(A)
2.5 2.3 2.1 1.9 1.7 1.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 .