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參數資料
| 型號： | AIC1553CVBG |
| 廠商： | Analog Integrations Corporation |
| 英文描述： | Compact 500KHz PWM/PFM, Step-Down DC/DC Converters |
| 中文描述： | 緊湊500KHz的PWM / PFM切換，降壓DC / DC轉換器 |
| 文件頁數： | 1/9頁 |
| 文件大小： | 391K |
| 代理商： | AIC1553CVBG |
AIC1553
Compact 500KHz PWM/PFM, Step-Down DC/DC
Converters
Analog Integrations Corporation
4F, 9 Industry E. 9th Rd, Science-Based Industrial Park, Hsinchu, Taiwan
DS-1553-P2 061402
TEL: 886-3-5772500
FAX: 886-3-5772510
www.analog.com.tw
1
z
Tiny 5-Lead SOT-23 package
z
Uses Tiny Capacitors and Inductor
z
High Frequency Operation: 500KHz
z
High Output Current: 500mA
z
Low R
DS(ON)
Internal Switch: 0.6
z
High Efficiency: Up to 90%
z
Current Mode Operation for Excellent Line and
Load Transient Response
z
Short-Circuit Protected
z
Low Quiescent Current: 22
μ
A
z
Low Dropout Operation: 100% Duty Cycle
z
Ultralow Shutdown Current: I
Q
< 1
μ
A
z
Peak Inductor Current Independent of Inductor
Value
z
Low Output Voltages: Down to 0.75V
z
Cellular Phones.
z
PDAs and Handy-Terminals.
z
CPU I/O Supplies.
z
Cordless Phones.
z
Notebook Chipset Supplies.
z
Handheld Equipment
The AIC1553 is a step-down, current mode,
DC/DC converter. It operates from 2.5V to 5.5V
input voltage range and switches at 500KHz,
allowing the use of tiny, low cost capacitors and
inductors. The output voltage is adjustable from
0.75V to 5V. A built-in 0.6
switch allows up to
0.5A of output current at high efficiency.
The AIC1553 operates continuously to very low
load currents to provide low ripple at the
expense of light load efficiency. With no load,
the AIC1553 draws only 22
μ
A. In shutdown
mode, it draws less than 1
μ
A, making it ideal for
current sensitive applications.
The tiny 5-lead SOT-23 package makes it
easy to save the layout area.
V
IN
+
C1
10
μ
F
SW1
GND2
VFB3
VIN
5
SD
4
U1
AIC1553
L1
6.8
μ
H
R2
560K
R1
240K
C2
47
μ
F
C3
D1
SS12
C4
4.7
μ
F
V
OUT
ON/OFF
2.5V
2.5V~5.5V
22pF
2.5V/500mA Step-Down Converter
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