SC1101CS.TR Semtech, SC1101CS.TR Datasheet

IC, VOLTAGE MODE PWM CTRL, 5.25V, 8-SOIC

SC1101CS.TR

Manufacturer Part Number
SC1101CS.TR
Description
IC, VOLTAGE MODE PWM CTRL, 5.25V, 8-SOIC
Manufacturer
Semtech
Datasheet

Specifications of SC1101CS.TR

Input Voltage
7V
Output Current
500mA
Frequency
200kHz
Supply Voltage Range
4.75V To 5.25V
Digital Ic Case Style
SOIC
No. Of Pins
8
Operating Temperature Range
0°C To +70°C
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant

Available stocks

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Part Number
Manufacturer
Quantity
Price
Part Number:
SC1101CS.TR
Manufacturer:
SC
Quantity:
20 000
Part Number:
SC1101CS.TR
Manufacturer:
SEMTECH
Quantity:
13 948
Company:
Part Number:
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Quantity:
17 170
The SC1101 is a versatile, low-cost, voltage-mode PWM
controller designed for low output voltage DC/DC power
supply applications. A simple, fixed-voltage buck
regulator can be implemented using the SC1101 with a
minimum of external components. Internal level shift and
drive circuitry eliminates the need for an expensive
p-channel, high-side switch. The small device footprint
allows for compact circuit design.
SC1101 features include a temperature compensated
voltage reference, triangle wave oscillator, current limit
comparator, frequency shift over-current protection, and
an internally compensated error amplifier. Pulse by pulse
current limiting is implemented by sensing the
differential voltage across an external resistor, or an
appropriately sized PC board trace.
The SC1101 operates at a fixed frequency of 200kHz,
providing an optimum compromise between efficiency,
external component size, and cost.
POWER MANAGEMENT
Revision: May 25, 2005
Description
Typical Application Circuit
+12V
+5V
GND
C4
0.1
* NOTE:
R1
10
R6 = R7 x (Vout/1.25 - 1) rounded to nearest 1%value
R2
1k
C1
1.0
C5
0.001
R3
1k
150/6.3V
C2
1
2
3
4
VCC
CS(-)
CS(+)
PGND
150/6.3V
C3
SC1101
U1
IRLR3103
Q1
GND
BST
DH
FB
8
7
6
5
C6
0.01
C7
0.1
MBRD1035L
D2
L1
4uH
1
Features
R4
2.2
Applications
Low cost / small size
Switch mode efficiency up to 95%
1% reference voltage accuracy
Over current protection
500mA output drive
SO-8 package
Pentium® P55 Core Supply
Low Cost Microprocessor Supplies
Peripheral Card Supplies
Industrial Power Supplies
High Density DC/DC Conversion
R5
0.05
C8
330/2.5V
Asynchronous Voltage
Mode PWM Controller
C9
330/2.5V
C10
330/2.5V
C11
1.0
Vout = 2V @ 10A
www.semtech.com
R6
76.8 *see note
R7
127
+
GND

Related parts for SC1101CS.TR

SC1101CS.TR Summary of contents

Page 1

... High Density DC/DC Conversion 4uH 0.05 IRLR3103 C3 D2 MBRD1035L 150/6.3V U1 SC1101 C6 R4 0.01 2.2 8 VCC GND 7 CS(-) FB 6 CS(+) BST C7 0.1 5 PGND DH 1 Asynchronous Voltage Mode PWM Controller Vout = 2V @ 10A + R6 76.8 *see note C11 C8 C9 C10 1.0 330/2.5V 330/2.5V 330/2.5V R7 127 GND www.semtech.com ...

Page 2

... Electrical Characteristics Unless specified 4.75 to 5.25, GND = P CC Per test circuit, unless otherwise specified Note: (1) This device is ESD sensitive. Use of standard ESD handling precautions is required. 2005 Semtech Corp ° 2.5V BST = 12V. GND ° < SC1101 ± ° ° ° ° ° ...

Page 3

... Top View VCC CS(-) 7 3 CS(+) 6 PGND Lead Plastic SOIC) Pin Descriptions Block Diagram 2005 Semtech Corp. Ordering Information GND Notes: (1) Only available in tape and reel packaging. A reel BST contains 2500 devices. (2) Lead free product. This product is fully WEEE and DH RoHS compliant. ...

Page 4

... The Output Capacitor(s) (Cout) should be located as close to the load as possible, fast transient load cur- 2005 Semtech Corp. rents are supplied by Cout only, and connections between Cout and the load must be short, wide copper areas to minimize inductance and resistance. ...

Page 5

... Application Circuit 5V to 2.0V @ 10A (Bootstrapped) + 1.0 150/6.3V 150/6.3V GND VCC 2 CS(-) C4 C5 0.001 0.1 3 CS(+) 4 PGND * NOTE (Vout/1. rounded to nearest 1%value 2005 Semtech Corp. 12V IN 0.1uF Cin Q1 8 VCC GND 7 CS(-) CS(+) BST 5 PGND LL42 0 4uH IRLR3103 D2 MBRD1035L U1 ...

Page 6

... O O 2.0% 1.5% 1.0% 0.5% 0.0% -0.5% -1.0% -1.5% -2.0% 4.500 4.750 5.000 Input Voltage, (V) Output Ripple Voltage 3.3V 10A 2005 Semtech Corp. Load Regulation 180 1.0% 0.8% 0.6% 135 0.4% 0.2% 90 0.0% -0.2% 45 -0.4% -0.6% 0 -0.8% -1.0% -45 0 1.0E+6 10 ...

Page 7

... REFERENCE JEDEC STD MS-012, VARIATION AA. Minimum 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. Contact Information Phone: (805)498-2111 FAX (805)498-3804 2005 Semtech Corp. A DIM E ...

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