AIC2359 PDF даташит
Спецификация AIC2359 изготовлена «Analog Intergrations Corporation» и имеет функцию, называемую «Step-Down DC/DC Converter». |
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Детали детали
Номер произв | AIC2359 |
Описание | Step-Down DC/DC Converter |
Производители | Analog Intergrations Corporation |
логотип |
11 Pages
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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
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AIC2359
Fig. 2 Fixed Output Voltage Step-Down DC/DC Converter
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AIC2359
ORDERING INFORMATION
AIC235 9-XXXXXXX
PACKING TYPE
TR: TAPE & REEL
B G: BA G
PACKAGE TYPE
DF: DFN-12 wit h he at sin k
(3 x3 x0. 75-0.4 5mm )
G: Green Package
Outpu t V olta ge: Vou t1/V out2
Def ault Ad justa ble
-ZK:3 .3V/1.8V
-ZE:3 .3V/1.2V
-RK:2.5V/1.8 V
PIN CO NFIGURATI ON
D FN-12 with heat s ink
T OP VIEW
VIN 2 1
LX2 2
G ND 3
FB1 4
N C1 5
EN1 6
12 EN2
11 N C2
10 FB2
9 GND
8 LX1
7 VIN1
Note :
The expo sed pa d m ust be co nn ecte d with
GND pin.
E xa mple: A IC23 59GDFTR
in Gree n P acka ge DFN-12 W ith Heat
Sink Package and Tape & R eel
Packin g Type
AIC23 59-ZKGDFTR
3.3V /1.8 V V out Ve rsio n
in Green Package DFN-12 W ith Hea t
S ink P acka ge an d Ta pe & Ree l
P acking T ype
ABSOLUTE MAXIMUM RATINS
Supply Input Volatge, VIN1, VIN2
Pin Voltage for all other Pins
Operating Ambient Temperature Range TA
Operating Maximum Junction Temperature TJ
Storage Temperature Range TSTG
Lead Temperature (Soldering 10 Sec.)
Thermal Resistance Junction to Case DFN-12L (3x3)*
Thermal Resistance Junction to Ambient DFN-12L (3x3)*
(Assume no Ambient Airflow)
6.0V
-0.3V to VIN
-40C to 85C
150C
-65C to 150C
260C
20C/W
50C/W
Absolute Maximum Ratings are those values beyond which the life of a device may be impaired.
*The package is place on a two layers PCB with 2 ounces copper and 2 square inch, connected by 8 vias.
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