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Analog Devices Semiconductor Electronic Components Datasheet

ADP1109 Datasheet

Micropower Low Cost Fixed 3.3 V/ 5 V/ 12 V and Adjustable DC-to-DC Converter

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ADP1109 pdf
a
Micropower Low Cost
Fixed 3.3 V, 5 V, 12 V and Adjustable
DC-to-DC Converter
FEATURES
Operates at Supply Voltages 2 V to 12 V
Fixed 3.3 V, 5 V, 12 V and Adjustable Output
Minimum External Components Required
Ground Current: 320 A
Oscillator Frequency: 120 kHz
Logic Shutdown
8-Lead DIP and SO-8 Packages
APPLICATIONS
Cellular Telephones
Single-Cell to 5 V Converters
Laptop and Palmtop Computers
Pagers
Cameras
Battery Backup Supplies
Portable Instruments
Laser Diode Drivers
Hand-Held Inventory Computers
GENERAL DESCRIPTION
The ADP1109 is a versatile step-up switching regulator. The
device requires only minimal external components to operate as
a complete switching regulator.
The ADP1109-5 can deliver 100 mA at 5 V from a 3 V input
and the ADP1109-12 can deliver 60 mA at 12 V from a 5 V
input. The device also features a logic controlled shutdown
capability that, when a logic low is applied, will shut down the
oscillator.
The 120 kHz operating frequency allows for the use of small
surface mount components. The gated oscillator capability
eliminates the need for frequency compensation.
ADP1109
FUNCTIONAL BLOCK DIAGRAMS
VIN SENSE
1.25V
REFERENCE
R2
250k
ADP1109-3.3: R1 = 152k
ADP1109-5: R1 = 83k
ADP1109-12: R1 = 29k
COMPARATOR
+
A1
120kHz
OSCILLATOR
Q1
SW
DRIVER
R1
GND
SHUTDOWN
Fixed Output
VIN FB
1.25V
REFERENCE
COMPARATOR
+
A1
ADP1109
SW
120kHz
OSCILLATOR
Q1
DRIVER
GND
SHUTDOWN
Adjustable Output
TYPICAL APPLICATION
L1
33H
D1
VIN
5V
VIN SW SENSE
ADP1109-12
SHUTDOWN
GND
SHUTDOWN/PROGRAM
+ C1
22F
16V
VOUT
12V
60mA
Flash Memory VPP Generator
REV. 0
Information furnished by Analog Devices is believed to be accurate and
reliable. However, no responsibility is assumed by Analog Devices for its
use, nor for any infringements of patents or other rights of third parties
which may result from its use. No license is granted by implication or
otherwise under any patent or patent rights of Analog Devices.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781/329-4700 World Wide Web Site: http://www.analog.com
Fax: 781/326-8703
© Analog Devices, Inc., 1998


Analog Devices Semiconductor Electronic Components Datasheet

ADP1109 Datasheet

Micropower Low Cost Fixed 3.3 V/ 5 V/ 12 V and Adjustable DC-to-DC Converter

No Preview Available !

ADP1109 pdf
ADP1109–SPECIFICATIONS (0؇C TA +70؇C, VIN = 3 V unless otherwise noted)
Parameter
Conditions
Symbol
Min Typ
QUIESCENT CURRENT
Switch Off
IQ
450
INPUT VOLTAGE
VIN 2
COMPARATOR TRIP POINT
VOLTAGE
1.20 1.25
COMPARATOR HYSTERESIS
ADP1109
8
OUTPUT VOLTAGE
ADP1109-3.3
ADP1109-5
ADP1109-12
OUTPUT VOLTAGE RIPPLE
2 V VIN 3 V
3 V VIN 5 V
3 V VIN 12 V
ADP1109-3.3
ADP1109-5
ADP1109-12
VOUT
3.13
4.75
11.45
3.30
5.00
12.00
16
20
40
OSCILLATOR FREQUENCY
TA = +25°C
fOSC 100 120
90
DUTY CYCLE
Full Load
DC 40 50
SWITCH-ON TIME
TA = +25°C
tON 3.1 4.2
3.0
SWITCH SATURATION VOLTAGE
ADP1109-3.3
ADP1109-5
ADP1109-12
ISW = 500 mA
VIN = 3 V
VIN = 3 V
VIN = 5 V
VCESAT
SWITCH LEAKAGE CURRENT
VSW = 12 V, TA = +25°C
SHUTDOWN PIN HIGH
VIH
SHUTDOWN PIN LOW
VIL
SHUTDOWN PIN INPUT CURRENT VSHUTDOWN = 2 V
IIH
SHUTDOWN PIN INPUT CURRENT VSHUTDOWN = 0.8 V
IIL
NOTES
All limits at temperature extremes are guaranteed via correlation using standard quality control methods.
Specifications subject to change without notice.
0.4
0.4
0.4
1
2.0
Max
590
9
1.30
14
3.46
5.25
12.55
40
50
110
140
155
70
5.9
6.5
0.8
0.8
0.8
10
0.8
10
20
Units
µA
V
V
mV
V
V
V
mV
mV
mV
kHz
kHz
%
µs
µs
V
V
V
µA
V
V
µA
µA
VIN = 2V
L1 = CTX15-1
L1
15H
1N5818
+5V
SW
VIN SENSE
ADP1109-5
GND
300mA
at 3V INPUT
50mA
at 2V INPUT
+ 22F
16V
Figure 1. 2 V to 5 V Converter
VIN = 2V
L1 = CTX15-1
L1
15H
1N5818
+12V
SW
VIN SENSE
ADP1109-12
GND
40mA
at 3V INPUT
10mA
at 2V INPUT
+ 10F
20V
Figure 2. 2 V to 12 V Converter
VIN = 2V
L1 = CTX15-1
L1
15H
1N5818
SW
VIN SENSE
ADP1109-12
SHUTDOWN
GND
+5V
300mA
at 3V INPUT
50mA
at 2V INPUT
+ 22F
16V
SHUTDOWN
Figure 3. 2 V to 5 V Converter
With Shutdown
–2– REV. 0


Part Number ADP1109
Description Micropower Low Cost Fixed 3.3 V/ 5 V/ 12 V and Adjustable DC-to-DC Converter
Maker Analog Devices
Total Page 8 Pages
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