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PDF AIC2359 Data sheet ( Hoja de datos )
| Número de pieza | AIC2359 | |
| Descripción | Step-Down DC/DC Converter | |
| Fabricantes | Analog Intergrations Corporation | |
| Logotipo |  |
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AIC2359
1A Dual Synchronous Step-down DC/DC Converter
FEATURES
Dual 1A Output
2.5V to 5.5V Input Range
Accurate Reference 0.6V Provides Low Output
Voltages
Adjustable Output Voltage
Up to 95% Efficiency
Stable with Low ESR Output Ceramic Capaci-
tors
No Schottky Diode Required.
65µA Quiescent Current per Channel.
100% Duty Cycle in Low Dropout Operation.
1.5MHz Fixed-Frequency PWM Operation
APPLICATIONS
Digital Still Cameras
Cellular Phones
Wireless and DSL Modems
Notebook Chipset Supplies.
PDAs and Handy-Terminals.
Battery-Operated Devices (1 Li-Ion or 3 NiMH/
NiCd).
DESCRIPTION
The AIC2359 is a dual output, low-noise,
pulse-width-modulated (PWM), DC-DC step-
down converter. It powers logic and transmit-
ters in small wireless systems such as cellular
phones, communicating PDAs, and handy-
terminals.
The device features an internal synchronous
rectifier for high efficiency; it requires no exter-
nal Schottky diode. Internally fixed-frequency
1.5MHz operation provides easy post-filtering
and allows the use of small inductors and ca-
pacitors. The AIC2359 is ideally suited for Li-
Ion battery applications. PWM/PSM mode ex-
tends battery life by switching to a pulse-
skipping-modulated mode during light loads.
Shutdown mode places the device in standby,
reducing supply current to under 1µA..
Other features of the AIC2359 include high ef-
ficiency, soft start, over temperature protection,
and over current protection. It is available in a
space-saving
12-pin
DFN.
TYPICAL APPLICATIONS CIRCUIT
Vin2
Vout1
2.2uH
L2
R12
10uF
Cout1
1 VIN2
4.7uF
Cin2
2
LX2
3 GND
4 FB1
5 NC1
6
22pF R11
EN1
C11 AIC2359
EN2
NC2
FB2
GND
LX1
VIN1
2.2uH
L1
12
11
10
9
8
7
Vout2
10uF
Cout2
R21
22pF
C21
R22
4.7uH
Cin1
Vin1
Fig. 1 Adjustable Output Voltage Step-Down DC/DC Converter
Analog Integrations Corporation
Si-Soft Research Center
3A1, No.1, Li-Hsin Rd. I , Science Park , Hsinchu 300, Taiwan , R.O.C.
TEL: 886-3-5772500
FAX: 886-3-5772510
DS-2359G-02 20120209
www.analog.com.tw
1
1 page  
TYPICAL PERFORMANCE CHARACTERISTICS
AIC2359
Fig. 3 Efficiency vs. Input Voltage
Fig. 4 Efficiency vs. Output Current
Fig. 5 Efficiency vs. Output Current
Fig. 6 Efficiency vs. Output Current
Fig. 7 Output Voltage vs. Temperature
Fig. 8 Oscillator Frequency vs. Temperature
5
5 Page 
PHYSICAL DIMENSIONS (unit: mm)
DFN 12L-3x3x0.75-0.45mm PACKAGE OUTLINE DRAWING
D D2
7
AIC2359
12
PIN#1
61
e
S DFN 12L-3x3x0.75-0.45mm
Y
M MILLIMETERS
B
O
L
MIN.
MAX.
A 0.70
0.80
A3 0.20 BSC
b 0.18
0.30
b
SEATING PLANE
D 2.90
3.10
D2 2.20
E 2.90
2.70
3.10
E2 1.40
1.80
e 0.45 BSC
L 0.30
0.50
Note : 1. DIMENSION AND TOLERANCING CONFORM TO ASME Y14.5M-1994.
2.CONTROLLING DIMENSIONS：MILLIMETER，CONVERTED INCH
DIMENSION ARE NOT NECESSARILY EXACT.
Note:
Information provided by AIC is believed to be accurate and reliable. However, we cannot assume responsibility for use of any circuitry other than circuitry
entirely embodied in an AIC product; nor for any infringement of patents or other rights of third parties that may result from its use. We reserve the right
to change the circuitry and specifications without notice.
Life Support Policy: AIC does not authorize any AIC product for use in life support devices and/or systems. Life support devices or systems are devices
or systems which, (I) are intended for surgical implant into the body or (ii) support or sustain life, and whose failure to perform, when properly used in
accordance with instructions for use provided in the labeling, can be reasonably expected to result in a significant injury to the user.
11
11 Page | ||
| Páginas | Total 11 Páginas | |
| PDF Descargar | [ Datasheet AIC2359.PDF ] | |
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