SC1565IS-1.8.TR Semtech, SC1565IS-1.8.TR Datasheet

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SC1565IS-1.8.TR

Manufacturer Part Number
SC1565IS-1.8.TR
Description
IC,VOLT REGULATOR,FIXED/ADJUSTABLE,+1.8/1.2 TO +4.8V,CMOS,SOP,8PIN,PLASTIC
Manufacturer
Semtech
Datasheet
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/TO-263 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 SO-8, 3-lead SOT-223, 3 and
5 lead TO-220 and 3 and 5 lead TO-263 packages. Three
lead packages are available with 1.8V and 2.5V fixed
output options only. The SO-8, TO-220-5 and TO-263-5
are available with 1.8V and 2.5V internally preset
outputs that are also adjustable using external resistors.
Notes:
(1) Maximum VO setpoint for 1.8V parts = 5.4V.
(2) This device is designed to operate with ceramic input and output capacitors.
Revision: April 27, 2005
POWER MANAGEMENT
Description
Typical Application Circuits
VIN
ENABLE
VIN
VO
C1
C1
1
C2
SC1565IT-X.X
VIN
U1
GND
2
VO
R1
R2
VO
3
1.200
1
2
3
4
(R1
R2
SC1565IS-X.X
EN
VIN
VO
ADJ
U1
C2
R2)
GND
GND
GND
GND
VO
Volts
8
7
6
5
ENABLE
VIN
1
Note:
(1) SO-8, TO-220-5 and TO-263-5 packages only.
Features
Applications
ENABLE
C1
350mV dropout @ 1.5A
Adjustable output from 1.2V to 4.8V
2.5V and 1.8V options (adjustable externally
using resistors)
Over current and over temperature protection
Enable pin
10µA quiescent current in shutdown
Low reverse leakage (output to input)
Surface mount and through-hole packages
Full industrial temperature range
TO-220, TO-263, SOT-223 and SO-8 Packages
Battery powered systems
Motherboards
Peripheral cards
Network cards
Set Top Boxes
Medical Equipment
Notebook Computers
1.5 Amp Regulator With Enable
VIN
VO
2
1
VIN
EN
SC1565I5T-X.X
U1
C1
GND ADJ
3
(1)
VO
(1)
C2
4
5
Very Low Dropout
R1
R2
VO
1
2
3
4
SC1565IS-X.X
EN
VIN
VO
ADJ
U1
C2
1.200
GND
GND
GND
GND
(1)
(1)
SC1565
www.semtech.com
(R1
R2
8
7
6
5
R2)
Volts
VO

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SC1565IS-1.8.TR Summary of contents

Page 1

... Notebook Computers GND 2 7 VIN GND ENABLE GND VIN 4 5 ADJ GND VO SC1565IS-X.X 1.200 (R1 R2) Volts R2 2 VIN 1 ENABLE SC1565 Very Low Dropout (1) (1) (1) ( GND 2 7 VIN GND GND 4 5 ADJ GND C1 C2 SC1565IS-X.X 1.200 ( SC1565I5T-X.X 4 VIN GND ADJ www.semtech.com R2) Volts VO ...

Page 2

... Note: (1) 1 square inch of FR-4, double sided, 1 oz. minimum copper weight. Electrical Characteristics Unless specified Adjustable Option ( Fixed Options (V = GND 0.7V) to 5.5V and I ADJ 2005 Semtech Corp > 2.2V to 5.5V and I = 10µA to 1.5A. ADJ TH(ADJ 1.5A. Values in bold apply over the full operating temperature range SC1565 ...

Page 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 V exceeds this threshold, the “Sense Select” switch disconnects the internal feedback chain from ADJ the error amplifier and connects V 2005 Semtech Corp. > 2.2V to 5.5V and I = 10µA to 1.5A. ADJ TH(ADJ) ...

Page 4

... POWER MANAGEMENT Pin Configurations SO-8 SOT-223 TO-220 2005 Semtech Corp. Ordering Information Notes: (1) Where -X.X denotes voltage options. Available voltages are: 2.5V and 1.8V. Output voltage can be adjusted using external resistors, see Pin Descriptions on page 5. (2) Where -X.X denotes voltage options. Available voltages are: 2 ...

Page 5

... POWER MANAGEMENT Block Diagram * * Not present on SOT-223, TO-220-3 or TO-263-3 Pin Descriptions 1.200 (R1 R2 2005 Semtech Corp Volts SC1565 www.semtech.com * . ...

Page 6

... Temperature vs. Output Current 2.550 VIN = 5.5V 2.540 2.530 2.520 2.510 2.500 2.490 2.480 2.470 2.460 2.450 -50 - (°C) J 2005 Semtech Corp. Dropout Voltage (I 500 450 400 350 300 250 200 150 100 50 0 3.8 4.0 4.2 4.4 4.6 2.2 2.4 Output Voltage (2.5V) vs. Junction 2 ...

Page 7

... T (°C) J Off-State Quiescent Current vs. Junction Temperature 10 VIN = 5. -50 - (°C) J 2005 Semtech Corp. 600 VIN = 3.3V 590 580 570 I = 10mA O 560 550 540 I = 1.5A O 530 520 510 500 75 100 125 150 -50 75 100 125 150 7 SC1565 Quiescent Current vs. Junction Temperature ...

Page 8

... External voltage selection resistors: the use of 1% resistors, and designing for a current flow recommended to ensure a well regulated output (thus R2 120k ). 2005 Semtech Corp. Thermal Considerations The power dissipation in the SC1565 is approximately equal to the product of the output current and the input to output voltage differential: ...

Page 9

... POWER MANAGEMENT Applications Information (Cont.) Co=2.2uF, Stable Region: Unstable Region: 0.001 0.01 0.1 1 ESR(Ohms) Co=220uF, Stable Region: 0.001 2005 Semtech Corp. Co=22uF, Stable Region: Unstable Region: 1.5mA 15mA Load 150mA 1.5A 0.001 0.01 10 Unstable Region: 0.01 0.1 1 ESR(Ohms) Figure 1: Phase-margin Contour Plot ...

Page 10

... REFERENCE JEDEC STD MS-012, VARIATION AA. Land Pattern - SO-8 X (C) P NOTES: 1. THIS LAND PATTERN IS FOR REFERENCE PURPOSES ONLY. CONSULT YOUR MANUFACTURING GROUP TO ENSURE YOUR COMPANY'S MANUFACTURING GUIDELINES ARE MET. 2. REFERENCE IPC-SM-782A, RLP NO. 300A. 2005 Semtech Corp. A DIM MIN .053 N A1 .004 A2 .049 ...

Page 11

... POWER MANAGEMENT Outline Drawing - SOT-223 Land Pattern - SOT-223 2005 Semtech Corp. 11 SC1565 www.semtech.com ...

Page 12

... POWER MANAGEMENT Outline Drawing - T0-263-3 Minimum Land Pattern - TO-263-3 2005 Semtech Corp. 12 SC1565 www.semtech.com ...

Page 13

... POWER MANAGEMENT Outline Drawing - TO-263-5 Minimum Land Pattern - TO-263-5 2005 Semtech Corp. 13 SC1565 www.semtech.com ...

Page 14

... POWER MANAGEMENT Outline Drawing - TO-220-3 Outline Drawing - TO-220-5 Contact Information Phone: (805)498-2111 FAX (805)498-3804 2005 Semtech Corp. Semtech Corporation Power Management Products Division 200 Flynn Road, Camarillo, CA 93012 14 SC1565 www.semtech.com ...

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