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PDF AIC1638-33CZ Data sheet ( Hoja de datos )
| Número de pieza | AIC1638-33CZ | |
| Descripción | 3-PIN ONE-CELL STEP-UP DC/DC CONVERTER | |
| Fabricantes | Analog Intergrations Corporation | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de AIC1638-33CZ (archivo pdf) en la parte inferior de esta página. Total 15 Páginas | ||
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FEATURES
! Guaranteed Start-Up from below 0.9 V.
! High Efficiency.
! Low Quiescent Current.
! Few Number of External Components needed.
! Low Ripple and Low Noise.
! Fixed Output Voltage: 2.7V, 3.0V, 3.3V, and 5V.
! Space Saving SOT-89 and TO-92 Packages.
APPLICATIONS
! Pagers.
! Cameras.
! Wireless Microphones.
! Pocket Organizers.
! Battery Backup Suppliers.
! Portable Instruments.
AIC1638
3-PIN ONE-CELL STEP-UP DC/DC CONVERTER
SPEC NO: DS-1638-00 03/01/00
DESCRIPTION
The AIC1638 is a high efficiency step-up DC/DC
converter for applications using 1 to 4 NiMH battery
cells. Only three external components are required to
deliver a fixed output voltage of 2.7V, 3.0V, 3.3V, or
5V. The AIC1638 starts up from below 0.9V input with
1mA load. Pulse Frequency Modulation scheme
brings optimized performance for applications with
light output loading and low input voltages. The output
ripple and noise are lower compared with the circuits
operating in PSM mode.
The PFM control circuit operating in 100KHz (max.)
switching rate results in smaller passive
components. The space saving SOT-89 and TO-92
packages make the AIC1638 an ideal choice of
DC/DC converter
for space conscious
applications, like pagers, electronic cameras, and
wireless microphones
TYPICAL APPLICATION CIRCUIT
VIN
+ C2
47µF
L1
88µH
D1
VOUT
AIC1638-27
SW
AIC1638-30
AIC1638-33
AIC1638-50
GND
VOUT
+
C1
22µF
One Cell Step-Up DC/DC Converter
ANALOG INTEGRATIONS CORPORATION
4F, 9 Industry E. 9th Road, Science-based Industrial Park , Hsinchu, Taiwan, R.O.C.
www.analog.com.tw
TEL: (8863)577-2500 FAX:(8863)577-2510
1
1 page  
AIC1638
3-PIN ONE-CELL STEP-UP DC/DC CONVERTER
SPEC NO: DS-1638-00 03/01/00
" TYPICAL PERFORMANCE CHARACTERISTICS (CONTINUED)
2.78
2.76
2.74
2.72
2.70
2.68
2.66
2.64
2.62
-40
AIC1638-27 Output Voltage vs Temperature
No Load
-20 0
20 40 60 80 100
Temperature (°C)
AIC1638-27 Switching Frequency vs Temperature
160
140
120
100
80
60
40
20
-40
-20
0 20 40 60
Temperature (°C)
80 100
AIC1638-27 Maximum Duty Cycle vs Temperature
82
80
78
76
74
72
70
68
66
-40
-20
0 20 40 60
Temperature (°C)
80 100
1.8
1.6
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0.0
-40
AIC1638-27 SW On Resistance vs Temperature
-20 0
20 40 60 80
Temperature (°C)
100
AIC1638-27 Supply Current vs Temperature
52
48
44
40
36
32
28
24
20
-40
-20
0 20 40 60
Temperature (°C)
80 100
AIC1638-30 Load Regulation (L=100µH, CD54)
3.1
3.0 2.0V
2.9
2.8 1.5V 1.8V
2.7
2.6
2.5
2.4
2.3
2.2
2.1 VIN=0.9V
1.2V
2.0
0 10 20 30 40 50 60 70 80 90 100 110 120 130 140
Output Current (mA)
ANALOG INTEGRATIONS CORPORATION
4F, 9 Industry E. 9th Road, Science-based Industrial Park , Hsinchu, Taiwan, R.O.C.
www.analog.com.tw
TEL: (8863)577-2500 FAX:(8863)577-2510
5
5 Page 
AIC1638
3-PIN ONE-CELL STEP-UP DC/DC CONVERTER
SPEC NO: DS-1638-00 03/01/00
" TYPICAL PERFORMANCE CHARACTERISTICS (CONTINUED)
VOUT
50mV/div
Load Step
50mA/div
VOUT
20mv/div
VIN
0.5V/div
Load Transient Response
(L=100µH, Co=47µF, VIN=2V)
BLOCK DIAGRAM
Line Transient Response
VOUT
1.25V REF.
1M
-
+
GND
Enable OSC, 100KHz
SW
PIN DESCRIPTIONS
PIN1 : GND - Ground. Must be low impedance;
sorder directly to ground plane.
PIN2 : VOUT - IC supply pin. Connect VOUT to
the regulator output.
PIN3 : SW – Internal drain of N-MOSFET switch.
APPLICATION INFORMATION
GENERAL DESCRIPTION
AIC1638 PFM (pulse frequency modulation) controller
ICs combine a switch mode regulator, N-channel
power MOSFET, precision voltage reference, and
voltage detector in a single monolithic device. They
offer both extreme low quiescent current, high
efficiency, and very low gate threshold voltage to
ANALOG INTEGRATIONS CORPORATION
4F, 9 Industry E. 9th Road, Science-based Industrial Park , Hsinchu, Taiwan, R.O.C.
ensure start-up with low battery voltage ( 0.8V typ.).
Designed to maximize battery life in portable products,
and minimize switching losses by only switching as
needed service the load.
PFM controllers transfer a discrete amount of energy
per cycle and regulate the output voltage by
modulating switching frequency with the constant
www.analog.com.tw
TEL: (8863)577-2500 FAX:(8863)577-2510
11
11 Page | ||
| Páginas | Total 15 Páginas | |
| PDF Descargar | [ Datasheet AIC1638-33CZ.PDF ] | |
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