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參數資料
| 型號： | FAN2012 |
| 廠商： | Fairchild Semiconductor Corporation |
| 英文描述： | 1.5A Low Voltage Current Mode Synchronous PWM Buck Regulator |
| 中文描述： | 1.5A的低電壓電流模式同步PWM降壓穩壓器 |
| 文件頁數： | 1/10頁 |
| 文件大?。?/td> | 240K |
| 代理商： | FAN2012 |
FAN2011/FAN2012 Rev. 1.0.2
1
www.fairchildsemi.com
November 2004
F
FAN2011/FAN2012
1.5A Low Voltage Current Mode Synchronous PWM Buck
Regulator
Features
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95% Efficiency, Synchronous Operation
Adjustable Output Voltage from 0.8V to V
4.5V to 5.5V Input Voltage Range
Up to 1.5A Output Current
Fixed Frequency 1.3 MHz PWM Operation
100% Duty Cycle Low Dropout Operation
Soft Start
Excellent Load Transient Response
3x3mm 6-lead MLP Package
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IN
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Applications
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Hard Disk Drive
Set Top Box
Point of Load Power
Notebook Computers
Communications Equipment
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Description
The FAN2011/FAN2012 is a high-efficiency, low-noise synchro-
nous PWM current mode DC-DC converter, designed for low
voltage applications. It provides up to 1.5A continuous load cur-
rent from the 4.5V to 5.5V input. The output voltage is adjust-
able over a wide range of 0.8V to V
voltage divider.
IN
by means of an external
The FAN2011 is always on, while the FAN2012 has an “Enable
Input,” and the device can be put in the shutdown mode, in
which the ground current falls below 1μA.
A current mode control loop with a fast transient response
ensures excellent line and load regulation. The fixed 1.3MHz
switching frequency enables the user to choose a small, inex-
pensive external inductor and capacitor. Filtering is also easily
accomplished with very small components.
Protection features include input under-voltage lockout, short
circuit protection and thermal shutdown. Soft-start limits in-rush
current during start-up conditions.
The device is available in a 3x3mm 6-lead MLP package, mak-
ing it possible to build a 1.5A complete DC/DC converter in a
tiny space on the PCB.
Typical Application
Figure 1. Typical Application
FAN2011
FAN2012
1
2
3
6
5
4
FB
PGND
SW
PV
IN
V
IN
NC
P1
(AGND)
L1
R2
R1
+5V
V
OUT
4 x 10
μ
F
3.3
μ
H
10
μ
F
10K
1
2
3
6
5
4
FB
PGND
SW
PV
IN
V
IN
EN
P1
(AGND)
L1
R2
R1
+5V
V
OUT
4 x 10
μ
F
3.3
μ
H
10
μ
F
10K
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| FAN2012_AAA3086B WAF | 制造商:Fairchild Semiconductor Corporation 功能描述: |
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| FAN2012EMPX | 功能描述:直流/直流開關轉換器 ANG FG 1.5a Syncr. Switcher RoHS:否 制造商:STMicroelectronics 最大輸入電壓:4.5 V 開關頻率:1.5 MHz 輸出電壓:4.6 V 輸出電流:250 mA 輸出端數量:2 最大工作溫度:+ 85 C 安裝風格:SMD/SMT |
| FAN2012I | 制造商:FAIRCHILD 制造商全稱:Fairchild Semiconductor 功能描述:1.5A Low Voltage Current Mode Synchronous PWM Buck Regulator |
| FAN2012IMPX | 制造商:FAIRCHILD 制造商全稱:Fairchild Semiconductor 功能描述:1.5A Low Voltage Current Mode Synchronous PWM Buck Regulator |
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