EEWORLDEEWORLDEEWORLD

Part Number

Search

SC4502H

Description
2 A SWITCHING REGULATOR, 2000 kHz SWITCHING FREQ-MAX, PDSO10
CategoryPower/power management   
File Size404KB,19 Pages
ManufacturerSEMTECH
Websitehttp://www.semtech.com
Download Datasheet Compare View All

SC4502H Overview

2 A SWITCHING REGULATOR, 2000 kHz SWITCHING FREQ-MAX, PDSO10

SC4502/SC4502H
1.4Amp, 2MHz Step-Up Switching
Regulator with Soft-Start
POWER MANAGEMENT
Description
The SC4502/SC4502H is a high-frequency current-mode
step-up switching regulator with an integrated 1.4A
power transistor. Its high switching frequency (program-
mable up to 2MHz) allows the use of tiny surface-mount
external passive components. Programmable soft-start
eliminates high inrush current during start-up. The inter-
nal switch is rated at 32V (40V for the SC4502H) mak-
ing the converter suitable for high voltage applications
such as Boost, SEPIC and Flyback.
The operating frequency of the SC4502/SC4502H can
be set with an external resistor. The ability to set the
operating frequency gives the SC4502/SC4502H design
flexibilities. A dedicated COMP pin allows optimization of
the loop response. The SC4502/SC4502H is available
in thermally enhanced 10-pin MLPD package.
Features
Low saturation voltage switch: 210mV
(250mV for the SC4502H)
Constant switching frequency current-mode control
Programmable switching frequency up to 2MHz
Soft-Start function
Input voltage ranges from 1.4V to 16V
Output voltage up to 32V (40V for the SC4502H)
Low shutdown current
Adjustable undervoltage lockout threshold
Small low-profile thermally enhanced lead free
package. This product is fully WEEE and RoHS
compliant.
Applications
Flat screen LCD bias supplies
TFT bias supplies
XDSL power supplies
Medical equipment
Digital video cameras
Portables devices
White LED power supplies
Typical Application Circuit
VIN
5V
8
OFF ON
C1
2.2µF
3
10
IN
SHDN
SC4502
SS
GND
C3
47nF
4,5
COMP
ROSC
9
R4
C4
6,7
SW
FB
2
1
R3
C6
R2
100K
C2
10µF
L1
D1
10BQ015
VOUT
12V
R1
866K
Efficiency
95
90
85
10.5
µ
H, 700KHz
5.3µ
H, 1.4MHz
Efficiency (%)
80
75
70
65
60
55
50
V
IN
= 5V
V
OUT
= 12V
0.0
0.1
0.2
0.3
0.4
0.5
3.3µ
H, 2MHz
All Capacitors are Ceramic.
f
(MHz)
0.7
1.4
2
R
3
(K
Ω )
R
4
(K
Ω )
33.2
59.0
73.2
23.7
9 .5 3
5.36
C
4
(pF)
1500
560
330
C
6
(pF)
-
-
22
L
1
(µH)
10.5 (Falco D08019)
5.3 (Sumida CDRH5D28)
3.3 (Coilcraf t DO1813P)
Load Current (A)
Figure 1(b). Efficiencies of 5V to 12V Boost Converters at
700KHz, 1.4MHz and 2MHz.
Figure 1(a). 5V to 12V Boost Converter.
Revision: July 25, 2005
1
www.semtech.com

SC4502H Related Products

SC4502H SC4502 SC4502HEVB SC4502EVB
Description 2 A SWITCHING REGULATOR, 2000 kHz SWITCHING FREQ-MAX, PDSO10 2 A SWITCHING REGULATOR, 2000 kHz SWITCHING FREQ-MAX, PDSO10 2 A SWITCHING REGULATOR, 2000 kHz SWITCHING FREQ-MAX, PDSO10 2 A SWITCHING REGULATOR, 2000 kHz SWITCHING FREQ-MAX, PDSO10
ActiveSync connection problem, no USB cable option
In my CE system control panel -> network dial-up connection -> select device option, there is only serial cabel but no USB cabel. But now I want to use USB cable to synchronize. How can I solve this p...
xrg0228 Embedded System
Creative PCB display
I made a board with MicroPython logo while the free PCB proofing times were not used up. The effect is good and the pins are made very carefully. You are also welcome to show PCB production together....
dcexpert DIY/Open Source Hardware
About TCP/IP protocol stack
The embedded TCP/IP protocol stack currently provides two APIs, a standard socket API and Itron API. I wrote a sample (TCP4 server) using Itron API and burned it into the development board. Then I wro...
Anna2007 Embedded System
MSP430 and 74 series connection problem
I have a display board. The original microcontroller used is 5V. Now I want to use MSP430G2553 to drive it. However, the output of MSP430 is 3.3V. How can I connect it if the voltage is not equal?...
zgzhang2014 Microcontroller MCU
I have never figured out this little problem with C language. I have been confused for a long time.
if((P1IFG0x0002)==0x0002) 0X0002 converted to binary is 10 What is the value of P1IFG for this conditional statement to be true? Is this statement 0x020x002==0x0002 true? Same 00000010b000000000010b==...
smallbird Microcontroller MCU
Baud rate problem
I use STM32F107VCT6 to write a serial port program. The baud rate is set to 9600. However, when I use an oscilloscope, each bit is more than 300 microseconds, and the time is wrong. Do I need to set t...
chenbingjy stm32/stm8

EEWorld
subscription
account

EEWorld
service
account

Automotive
development
circle

Robot
development
community

Index Files: 629  1168  1190  2438  2385  13  24  50  49  30 
Datasheet   0 1 2 3 4 5 6 7 8 9 A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
Room 1530, 15th Floor, Building B, No. 18 Zhongguancun Street, Haidian District, Beijing Telephone: (010) 82350740 Postal Code: 100190
Copyright © 2005-2026 EEWORLD.com.cn, Inc. All rights reserved 京ICP证060456号 京ICP备10001474号-1 电信业务审批[2006]字第258号函 京公网安备 11010802033920号