Semtech Corporation SC1565IS-1.8TR, SC1565IS-2.5TR, SC1565IST-1.8, SC1565IST-1.8TR, SC1565IST-2.5 Datasheet
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VERY LOW DROPOUT 1.5 AMP |
SC1565 |
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REGULATOR WITH ENABLE |
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October 3, 2000 |
TEL:805-498-2111 FAX:805-498-3804 WEB:http://www.semtech.com |
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DESCRIPTION
The SC1565 is a high performance positive voltage regulator designed for use in applications requiring very low dropout voltage at up to 1.5 Amps. Since it has superior dropout characteristics compared to regular LDOs, it can be used to supply 2.5V on motherboards or 2.8V on peripheral cards from the 3.3V supply thus allowing the elimination of costly heatsinks. Additionally, the 5-lead TO-220 and SO-8 versions have an enable pin to further reduce power dissipation while shut down. The SC1565 provides excellent regulation over variations in line, load and temperature.
The SC1565 is available in the popular SO-8 surface mount package with two internally preset output voltage options, which are also adjustable using external resistors. Also available are 5-lead and 3-lead TO-220 2.5V options (fixed output only for the 3-lead option) and fixed output SOT-223 options.
FEATURES
•350mV dropout @ 1.5A
•Adjustable output from 1.2V to 4.8V(1)
•2.5V and 1.8V options (adjustable externally using resistors)(1)
•Over current and over temperature protection
•Enable pin(1)
•10µA quiescent current in shutdown(1)
•Low reverse leakage (output to input)
•Surface mount and through-hole packages
•Full industrial temperature range
Note:
(1) SO-8 and TO-220-5L packages only.
APPLICATIONS
•Battery powered systems
•Motherboards
•Peripheral cards
•PCMCIA cards
ORDERING INFORMATION
DEVICE(1) |
PACKAGE |
SC1565IS-X.X.TR(2) |
SO-8 |
SC1565IST-X.X.TR(2) |
SOT-223 |
SC1565IT-X.X(3) |
TO-220-3 |
SC1565I5T-X.X(3) |
TO-220-5 |
Notes:
(1)Where -X.X denotes voltage options. Available voltages are: 2.5V and 1.8V. Output voltage can be adjusted (except SOT-223 and TO-220-3) using external resistors, see Pin Description.
(2)Only available in tape and reel packaging. A reel contains 2500 devices.
(3)Only available in tube packaging (no suffix required).
TYPICAL APPLICATIONS
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U1 |
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U1 |
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ENABLE |
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1 |
EN |
GND |
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2 |
SC1565I5T-2.5 |
4 |
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VIN |
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VO |
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VIN |
VO |
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7 |
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VIN |
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VIN |
GND |
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1 |
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5 |
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VO |
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3 |
VO |
GND |
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ENABLE |
EN |
GND |
ADJ |
R1 |
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ADJ |
GND |
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3 |
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R1 |
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SC1565IS-X.X |
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C1 |
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C2 |
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C1 |
C2 |
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R2 |
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1.200 (R1 + |
R2) |
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VO |
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R2 |
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R2 |
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VO |
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1.200 (R1 + |
R2) |
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R2 |
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U1 |
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SC1565IT-2.5V and SC1565IST-X.X |
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U1 |
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VIN |
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VIN |
VO |
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VO |
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ENABLE |
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1 |
EN |
GND |
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GND |
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VIN |
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2 |
VIN |
GND |
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C1 |
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C2 |
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VO |
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VO |
GND |
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2 |
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4 |
ADJ |
GND |
5 |
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C1 |
C2 |
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SC1565IS-X.X |
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Notes:
(1)Maximum VO setpoint for 1.8V parts = 5.4V.
(2)This device is designed to operate with ceramic input and output capacitors.
1
© 2000 SEMTECH CORP. |
652 MITCHELL ROAD NEWBURY PARK CA 91320 |
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VERY LOW DROPOUT 1.5 AMP |
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SC1565 |
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REGULATOR WITH ENABLE |
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October 3, 2000 |
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ABSOLUTE MAXIMUM RATINGS |
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Parameter |
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Symbol |
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Max |
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Units |
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Input Voltage |
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VIN |
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5.5 |
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V |
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Power Dissipation |
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PD |
Internally Limited |
W |
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Thermal Resistance Junction to Ambient |
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SO-8(1) |
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θ JA |
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65 |
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°C/W |
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SOT-223 |
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63 |
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TO-220-X |
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50 |
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Thermal Resistance Junction to Case |
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°C/W |
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SO-8 |
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θ JC |
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SOT-223 |
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27 |
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TO-220-X |
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3 |
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Operating Ambient Temperature Range |
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TA |
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-40 to 85 |
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°C |
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Operating Junction Temperature Range |
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TJ |
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-40 to 150 |
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°C |
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Storage Temperature Range |
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TSTG |
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-65 to 150 |
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°C |
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Lead Temperature (Soldering) 10 Sec. |
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TLEAD |
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300 |
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°C |
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ESD Rating (Human body model) |
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ESD |
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4 |
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kV |
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Note: |
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(1) 1 square inch of FR-4, double sided, 1 oz. minimum copper weight. |
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ELECTRICAL CHARACTERISTICS |
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Unless specified: VEN = VIN |
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Adjustable Option (VADJ > VTH(ADJ)): VIN = 2.2 to 5.5V and IO = 10µA to 1.5A |
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Fixed Options (VADJ = GND): VIN = (VO + 0.7V) to 5.5V and IO = 0A to 1.5A |
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Values in bold apply over the full operating temperature range. |
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Parameter |
Symbol |
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Test Conditions |
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Min |
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Typ |
Max |
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Units |
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VIN |
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Supply Voltage Range |
VIN |
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2.2 |
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5.5 |
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V |
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Quiescent Current |
IQ |
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VIN = 3.3V |
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0.75 |
1.75 |
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mA |
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VIN = 5.5V, VEN = 0V |
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10 |
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µA |
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VO |
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Output Voltage(1) |
VO |
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VIN = VO + 0.7V, IO = 10mA |
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0.99VO |
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VO |
1.01VO |
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V |
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(Internal Fixed Voltage) |
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0.98VO |
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VO |
1.02VO |
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Line Regulation(1) |
REG(LINE) |
VIN = (VO + 0.25V) to 5.5V, IOUT = 10mA |
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0.035 |
0.3 |
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% |
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Load Regulation(1) |
REG(LOAD) |
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VIN = VO + 0.7V |
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0.2 |
0.4 |
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2
© 2000 SEMTECH CORP. |
652 MITCHELL ROAD NEWBURY PARK CA 91320 |
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VERY LOW DROPOUT 1.5 AMP |
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SC1565 |
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REGULATOR WITH ENABLE |
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October 3, 2000 |
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ELECTRICAL CHARACTERISTICS |
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Unless specified: VEN = VIN |
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Adjustable Option (VADJ > VTH(ADJ)): VIN = 2.2 to 5.5V and IO = 10µA to 1.5A |
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Fixed Options (VADJ = GND): VIN = (VO + 0.7V) to 5.5V and IO = 0A to 1.5A |
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Values in bold apply over the full operating temperature range. |
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Parameter |
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Test Conditions |
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Min |
Typ |
Max |
Units |
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Dropout Voltage(2) |
VD |
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ILOAD = 10mA |
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2.5 |
10 |
mV |
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20 |
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ILOAD = 500mA |
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115 |
300 |
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400 |
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ILOAD = 1A |
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225 |
400 |
mV |
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500 |
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ILOAD = 1.5A |
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350 |
500 |
mV |
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600 |
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Minimum Load Current(3) |
IO |
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VIN = VO + 0.7V |
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1 |
10 |
µA |
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Current Limit |
ICL |
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1.50 |
2.50 |
3.50 |
A |
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ADJ |
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Reference Voltage(1) |
VREF |
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VIN = 2.2V, VADJ = VOUT, IO = 10mA |
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1.188 |
1.200 |
1.212 |
V |
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1.176 |
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1.224 |
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Adjust Pin Current(4) |
IADJ |
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VADJ = VREF |
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10 |
50 |
nA |
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Adjust Pin Threshold(5) |
VTH(ADJ) |
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0.10 |
0.20 |
0.40 |
V |
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EN |
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Enable Pin Current |
IEN |
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VEN = 0V, VIN = 3.3V |
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1.5 |
10 |
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Enable Pin Threshold |
VIH |
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VIN = 3.3V |
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1.8 |
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V |
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VIL |
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VIN = 3.3V |
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0.4 |
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OVER TEMPERATURE PROTECTION |
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High Trip level |
THI |
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170 |
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°C |
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Hysteresis |
THYST |
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°C |
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NOTES:
(1)Low duty cycle pulse testing with Kelvin connections required.
(2)Defined as the input to output differential at which the output voltage drops to 1% below the value measured at a differential of 0.7V.
(3)Required to maintain regulation. Voltage set resistors R1 and R2 are usually utilized to meet this requirement. Adjustable versions only.
(4)Guaranteed by design.
(5)When VADJ exceeds this threshold, the “Sense Select” switch disconnects the internal feedback chain from the error amplifier and connects VADJ instead.
3
© 2000 SEMTECH CORP. |
652 MITCHELL ROAD NEWBURY PARK CA 91320 |
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