a
FEATURES
Operates at Supply Voltages 2 V to 9 V
Fixed 3.3 V, 5 V, 12 V and Adjustable Output
Minimum External Components Required
Ground Current: 460 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
Micropower Low Cost
Fixed 3.3 V, 5 V, 12 V and Adjustable
DC-to-DC Converter
ADP1109A
FUNCTIONAL BLOCK DIAGRAM
V
IN
SENSE
R2
250k
COMPARATOR
1.25V
REFERENCE
A1
120kHz
OSCILLATOR
DRIVER
Q1
ADP1109A-3.3: R1 = 152k
ADP1109A-5: R1 = 83k
ADP1109A-12: R1 = 29k
SW
R1
GND
SHUTDOWN
PGND
V
IN
FB
ADP1109A
COMPARATOR
SW
120kHz
OSCILLATOR
DRIVER
GENERAL DESCRIPTION
1.25V
REFERENCE
A1
Q1
The ADP1109A is a versatile step-up switching regulator. The
device requires only minimal external components to operate as
a complete switching regulator.
The ADP1109A-5 can deliver 100 mA at 5 V from a 3 V input
and the ADP1109A-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.
GND
SHUTDOWN
PGND
TYPICAL APPLICATION
L1
33 H
D1
3
V
IN
5V
1
V
IN
SW
SENSE
8
ADP1109A-12
7
V
OUT
12V
60mA
SHUTDOWN
PGND
GND
4
5
+
SHUTDOWN/PROGRAM
C1
22 F
16V
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., 1997
ADP1109A–SPECIFICATIONS
(0 C
≤
T
≤
70 C, V
A
IN
= 3 V unless otherwise noted)
V
S
I
Q
V
IN
2
1.20
1.25
8
V
OUT
3.13
4.75
11.45
3.30
5.00
12.00
15
25
60
f
OSC
95
57
3.8
120
67
5.6
0.4
0.4
0.4
1
V
IH
V
IL
2.0
0.8
10
20
Min
Typ
460
Max
580
9
1.30
12.5
3.47
5.25
12.55
35
50
120
155
77
7.4
0.8
0.8
0.8
10
Units
µA
V
V
mV
V
V
V
mV
mV
mV
kHz
%
µs
V
V
V
µA
V
V
µA
µA
Parameter
QUIESCENT CURRENT
INPUT VOLTAGE
COMPARATOR TRIP POINT
VOLTAGE
COMPARATOR HYSTERESIS
OUTPUT VOLTAGE
ADP1109A-3.3
ADP1109A-5
ADP1109A-12
OUTPUT VOLTAGE RIPPLE
Conditions
Switch Off
ADP1109A
2 V
≤
V
IN
≤
3 V
2 V
≤
V
IN
≤
5 V
2 V
≤
V
IN
≤
9 V
ADP1109A-3.3
ADP1109A-5
ADP1109A-12
OSCILLATOR FREQUENCY
DUTY CYCLE
SWITCH-ON TIME
SWITCH SATURATION VOLTAGE
ADP1109A-3.3
ADP1109A-5
ADP1109A-12
SWITCH LEAKAGE CURRENT
SHUTDOWN PIN HIGH
SHUTDOWN PIN LOW
SHUTDOWN PIN INPUT CURRENT
SHUTDOWN PIN INPUT CURRENT
V
SHUTDOWN
= 4 V
V
SHUTDOWN
= 0 V
I
SW
= 500 mA
V
IN
= 3 V
V
IN
= 3 V
V
IN
= 3 V
V
SW
= 9 V, T
A
= +25°C
Full Load
DC
t
ON
V
CESAT
I
IH
I
IL
NOTES
All limits at temperature extremes are guaranteed via correlation using standard quality control methods.
Specifications subject to change without notice.
ABSOLUTE MAXIMUM RATINGS*
Supply Voltage, V
OUT
. . . . . . . . . . . . . . . . . . . . –0.4 V to 20 V
SW Pin Voltage . . . . . . . . . . . . . . . . . . . . . . . . –0.4 V to 50 V
Shutdown Pin Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . 6.0 V
Switch Current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.2 A
Maximum Power Dissipation . . . . . . . . . . . . . . . . . . 300 mW
Operating Temperature Range . . . . . . . . . . . . 0°C to +70°C
Storage Temperature Range . . . . . . . . . . . . –65°C to +150°C
Lead Temperature (Soldering, 10 sec) . . . . . . . . . . . +300°C
*This is a stress rating only; operation beyond these limits can cause the device to
be permanently damaged.
–2–
REV. 0
ADP1109A
PIN FUNCTION DESCRIPTIONS
PIN CONFIGURATIONS
8-Lead Plastic DIP
(N-8)
V
IN 1
NC
2
8
Pin Mnemonic
1
2
3
4
5
6
7
8
V
IN
NC
SW
PGND
GND
NC
SHUTDOWN
FB(SENSE)
Function
Input Supply Voltage.
No Connection.
Collector Node of Power Transistor.
Power Ground.
Ground.
No Connection.
When logic low is applied to this pin,
oscillator is shut down.
On the ADP1109A (Adjustable), this
pin goes directly to the comparator input.
On the ADP1109A-3.3, ADP1109A-5
and ADP1109A-12, this pin is connected
through the internal resistor that sets
the output voltage.
ORDERING GUIDE
FB(SENSE)*
7
SHUTDOWN
TOP VIEW
SW
3
(Not to Scale)
6
NC
ADP1109A
PGND
4
5
GND
*FIXED VERSIONS
NC = NO CONNECT
8-Lead SOIC
(SO-8)
V
IN 1
NC
2
SW
3
PGND
4
8
FB(SENSE)*
ADP1109A
TOP VIEW
(Not to Scale)
7
SHUTDOWN
6
NC
5
GND
Model
ADP1109AAN
ADP1109AAR
ADP1109AAN-3.3
ADP1109AAR-3.3
ADP1109AAN-5
ADP1109AAR-5
ADP1109AAN-12
ADP1109AAR-12
Output
Voltage
ADJ
ADJ
3.3 V
3.3 V
5V
5V
12 V
12 V
Package
Description
Plastic DIP
Small Outline IC
Plastic DIP
Small Outline IC
Plastic DIP
Small Outline IC
Plastic DIP
Small Outline IC
Package
Options
N-8
SO-8
N-8
SO-8
N-8
SO-8
N-8
SO-8
*FIXED VERSIONS
NC = NO CONNECT
CAUTION
ESD (electrostatic discharge) sensitive device. Electrostatic charges as high as 4000 V readily
accumulate on the human body and test equipment and can discharge without detection.
Although the ADP1109A features proprietary ESD protection circuitry, permanent damage may
occur on devices subjected to high energy electrostatic discharges. Therefore, proper ESD
precautions are recommended to avoid performance degradation or loss of functionality.
WARNING!
ESD SENSITIVE DEVICE
REV. 0
–3–
ADP1109A
2k
20 H*
V
IN
3.3V
22 F
+
3
1
V
IN
MBRS130T3
12V
60mA
V
IN
5V
+
10 H*
22 F
MBRS130T3
2N4403
3
SW
SENSE
8
1
V
IN
SW
SENSE
8
ADP1109A-12
7
SHUTDOWN
ADP1109A-12
7
SHUTDOWN
V
OUT
12V
110mA
+
+
GND
5
PGND
4
+
GND
33 F**
25V
SHUTDOWN
*COILTRONICS CTX33-2
SUMIDA CD54-330LC
**AVX TPS SERIES
5
PGND
4
47 F**
20V
1 F
SHUTDOWN
*COILTRONICS CTX20-1
SUMIDA CD54-220LC
**AVX TPS SERIES
Figure 1. 3.3 V Powered Flash Memory VPP Generator
Figure 4. 5 V to 12 V Converter With Shutdown to 0 V at
Output
L1
33 H*
MBRS130T3
10 H*
V
IN
2V
22 F
+
3
1
V
IN
MBRS130T3
12V
35mA
3
SW
SENSE
8
ADP1109A-12
7
SHUTDOWN
V
IN
3V
1
V
IN
SW
FB
8
R2
250k
R1
40.3k
+
ADP1109A
7
SHUTDOWN
V
OUT
9V
GND
5
PGND
4
GND
+ 33 F**
25V
SHUTDOWN
5
GND
4
SHUTDOWN
*COILTRONICS CTX10-1
SUMIDA CD54-100LC
**AVX TPS SERIES
C1
22 F**
16V
*COILTRONICS CTX33-2
SUMIDA CD54-330LC
**AVX TPS SERIES
Figure 2. 2 V Powered Flash Memory VPP Generator
Figure 5. 3 V to 9 V Converter
10 H*
V
IN
2V
22 F
+
3
1
V
IN
MBRS130T3
5V
110mA
SW
SENSE
8
ADP1109A-5
7
SHUTDOWN
GND
5
PGND
4
+ 33 F**
10V
SHUTDOWN
*COILTRONICS CTX10-1
SUMIDA CD54-100LC
**AVX TPS SERIES
Figure 3. 2 V to 5 V Converter
–4–
REV. 0
ADP1109A
170
OSCILLATOR FREQUENCY – kHz
68
1.4
1.2
SATURATION VOLTAGE – V
150
DUTY CYCLE – %
65
1.0
0.8
0.6
0.4
0.2
130
V
IN
= 5V
V
IN
= 3V
62
110
59
90
V
IN
= 2V
70
50
–40
56
0
25
70
TEMPERATURE – C
85
53
–40
0
25
70
TEMPERATURE – C
85
0.0
0.1
0.2
0.4
0.6
0.8
I
SWITCH
CURRENT – A
1
1.2
Figure 6. Oscillator Frequency vs.
Temperature
Figure 7. Duty Cycle vs. Temperature
Figure 8. Saturation Voltage vs.
I
SWITCH
Current in Step-Up Mode
0.60
0.55
0.50
0.45
V
CE(SAT)
– V
6.0
V
CE(SAT)
@ V
IN
= 3V AND I
SW
= 0.65A
SWITCH-ON TIME – sec
600
550
5.5
5.0
4.5
4.0
3.5
3.0
2.5
2.0
–40
0
25
70
TEMPERATURE – C
85
QUIESCENT CURRENT – A
500
450
400
350
300
250
–40
0.40
0.35
0.30
0.25
0.20
0.15
0.10
–40
0
25
70
TEMPERATURE – C
85
0
25
70
TEMPERATURE – C
85
Figure 9. Switch Saturation Voltage
vs. Temperature
Figure 10. Switch-On Time vs.
Temperature
Figure 11. Quiescent Current vs.
Temperature
12.20
12.15
12.10
OUTPUT VOLTAGE – V
QUIESCENT CURRENT – A
600
500
12.05
12.00
11.95
11.90
11.85
11.80
11.75
11.70
–40
0
25
70
TEMPERATURE – C
85
400
300
200
2
4
6
8 10 12 14 16
INPUT VOLTAGE – Volts
18
20
Figure 12. 12 V Output Voltage vs.
Temperature
Figure 13. Quiescent Current vs.
Input Voltage
REV. 0
–5–
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