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參數(shù)資料
| 型號(hào)： | UC3550 |
| 廠商： | 友順科技股份有限公司 |
| 英文描述： | PWM CONTROLLED，PWM/PFM SWITCHABLE STEP-UP DC-DC CONTROLLER |
| 中文描述： | PWM控制，PWM / PFM切換升壓型DC - DC控制器 |
| 文件頁數(shù)： | 1/10頁 |
| 文件大小： | 203K |
| 代理商： | UC3550 |
UNISONIC TECHNOLOGIES CO, LTD
UC3550
CMOS
IC
www.unisonic.com.tw
Copyright 2005 Unisonic Technologies Co., Ltd
1 of 10
QW-R502-082,A
PWM CONT ROLLED
PWM/PFM S WIT CHABLE
S T EP-UP DC-DC CONT ROLLER
DES CRIPT ION
The UTC
UC3550
series is a compact, high efficiency, step-up
DC/DC controllers includes an error amplifier, oscillator, PWM
comparator, skip cycle comparator, voltage reference, soft-start,
and high speed lower ON-resistance driver for driving external
power devices (NMOS or NPN) ,Additionally, a CE (chip enable)
function that reduces power consumption during shut-down mode.
That typically operated from a single-or dual-cell battery packs. It
have a driver pin ,ext pin, for connecting to an external transistor
NMOS or NPN
. a lower ON-resistance external transistor can
obtain larger output current. With only external components, this
series allow a simple means to accommodate high output current
applications.
The UTC
UC3550
series goes automatically into skip switching
cycles under light load condition to maintain high efficiency.
FEAT URES
* Input voltage range
* Output voltage range
accuracy ± 2.5%
* High efficiency 88%
* Low start-up voltage of 0.9V typical at I
OUT
= 1.0mA
* Oscillator frequency: 300kHz.
* Chip enable pin with pull-up current source
* High output current up to 1000mA (V
IN
= 2.0V, V
OUT
=3.3V)
0.9~8V
1.8~6V programmable in 0.1V with high
typ.
20%
SOT-25
4
5
3
2
1
*Pb-free plating product number: UC3550L
ORDERING INFORMAT ION
Order Number
Normal
Lead Free Plating
UC3550L-xx-AF5-R
Package
Packing
UC3550-xx-AF5-R
SOT-25
Tape Reel
UC3550L-xx-AF5-R
(1)Packing Type
(2)Package Type
(3)Voltage Code
(4)Lead Plating
(1) R: Tape Reel
(2) AF5: SOT-25
(3) xx: reference to Marking Information
(4) L: Lead Free Plating, Blank: Pb/Sn
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| UC3550_10 | 制造商:UTC-IC 制造商全稱:UTC-IC 功能描述:PWM CONTROLLED,PWM/PFM SWITCHABLE STEP-UP DC-DC CONTROLLER |
| UC3550_11 | 制造商:UTC-IC 制造商全稱:UTC-IC 功能描述:PWM CONTROLLED??? PWM/PFM SWITCHABLE STEP-UP DC-DC CONTROLLER DESCRIPTION |
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| UC3550-50-AF5-R | 制造商:UTC-IC 制造商全稱:UTC-IC 功能描述:PWM CONTROLLED，PWM/PFM SWITCHABLE STEP-UP DC-DC CONTROLLER |
| UC3550G-XX-AF5-R | 制造商:UTC-IC 制造商全稱:UTC-IC 功能描述:PWM CONTROLLED,PWM/PFM SWITCHABLE STEP-UP DC-DC CONTROLLER |
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