The ADP1110 is part of a family of step-up/step-down switch-
ing regulators that operate from an input voltage supply of as
little as 1.0 V. This very low input voltage allows the ADP1110
to be used in applications that use a single cell as the primary
power source.
The ADP1110 can be configured to operate in either step-up or
step-down mode, but for input voltages greater than 3 V, the
ADP1111 would be a more effective solution.
An auxiliary gain amplifier can serve as a low battery detector as
well as a linear regulator.
The quiescent current of 300
µA
makes the ADP1110 useful in
remote or battery powered applications.
The 70 kHz frequency operation also allows for the use of sur-
face mount external capacitors and inductors.
Battery protection circuitry limits the effect of reverse current to
safe levels at reverse voltages up to 1.6 V.
RY
A
IN L
IM ICA
EL N
PR CH
TE DATA
Model
OLE
TE
FB
SW2
ORDERING GUIDE
Output
Voltage
Package
Description
Package
Option*
ADP1110AN
ADP1110AR
ADP1110AN-5
ADP1110AR-5
ADP1110AN-12
ADP1110AR-12
ADJ
ADJ
5V
5V
12 V
12 V
PDIP
SOIC
PDIP
SOIC
PDIP
SOIC
N-8
SO-8
N-8
SO-8
N-8
SO-8
*For outline information see Package Information section.
PIN CONFIGURATIONS
8-Lead Plastic DIP
(N-8)
I
LIM
1
V
IN
2
8 FB (SENSE)*
8-Lead SOIC
(SO-8)
I
LIM
V
IN
1
2
8 FB (SENSE)*
ADP1110
7 SET
A0
ADP1110
TOP VIEW
(Not to Scale)
7 SET
6 A0
5 GND
TOP VIEW
SW1 3 (Not to Scale) 6
SW2 4
SW1 3
SW2 4
5 GND
T
JMAX
= 90
o
,
θ
JA
= 130
o
C/W
*FIXED VERSIONS
T
JMAX
= 90
o
,
θ
JA
= 150
o
C/W
*FIXED VERSIONS
This information applies to a product under development. Its characteristics and specifications are subject to change without notice.
Analog Devices assumes no obligation regarding future manufacture unless otherwise agreed to in writing.
To obtain the most recent version or complete data sheet, call our fax retrieval system at 1-800-446-6212 or visit our World Wide Web site at http://www.analog.com.
REV. 0
1
ADP1110–SPECIFICATIONS
(@ T = +25 C, V
A
IN
= 1.5 V, unless otherwise noted)
V
S
Min
ADP1110
Typ
Max
Units
Parameter
Conditions
1
QUIESCENT CURRENT*
INPUT VOLTAGE*
Switch Off
Step-Up Mode
Step-Down Mode
I
Q
V
IN
1.15
1.0
210
V
OUT
4.75
11.4
300
12.6
12.6
30
220
5.00
12.00
4
90
200
230
5.25
12.6
8
180
400
90
78
µA
V
V
V
mV
V
V
mV
mV
mV
kHz
%
COMPARATOR TRIP POINT VOLTAGE*
OUTPUT SENSE VOLTAGE*
COMPARATOR HYSTERESIS*
ADP1110
1
ADP1110-5
2
ADP1110-12
2
ADP1110
ADP1110-5
ADP1110-12
f
OSC
Full Load (V
FB
< V
REF
)
DC
t
ON
OBS
OUTPUT HYSTERESIS*
OSCILLATOR FREQUENCY*
DUTY CYCLE*
SWITCH ON TIME*
FEEDBACK PIN BIAS CURRENT*
SET PIN BIAS CURRENT*
A0 OUTPUT LOW*
REFERENCE LINE REGULATION*
SWITCH SATURATION VOLTAGE*
STEP-UP MODE
A2 ERROR AMP GAIN*
REVERSE BATTERY CURRENT
CURRENT LIMIT
CURRENT LIMIT TEMPERATURE
COEFFICIENT
SWITCH-OFF LEAKAGE CURRENT
MAXIMUM EXCURSION BELOW GND
52
62
70
69
RY
A
IN L
IM ICA
EL N
PR CH
TE DATA
V
SET
= V
REF
I
SET
I
AO
= 300
µA
V
SET
= 150 mV
V
AO
1.0 V
≤
V
IN
≤
1.5 V
1.5 V
≤
V
IN
≤
12 V
V
IN
= 1.5 V, I
SW
= 400 mA
V
CESAT
V
IN
= 1.5 V, I
SW
= 500 mA
V
IN
= 5 V, I
SW
= 1 A
R
L
= 100 kΩ
3
A
V
(Note 4)
I
REV
220
Ω
Between I
LIM
and
V
IN
Measured at SW1 Pin
I
SW1
≤
10
µA,
Switch Off
I
LEAK
V
SW2
OLE
TE
7.5
10
12.5
150
µs
ADP1110 V
FB
= 0 V
I
FB
70
nA
100
300
nA
0.15
0.4
V
0.35
0.05
1.0
0.1
%/V
%/V
300
400
700
1000
5000
750
400
–0.3
1
–400
10
–350
400
600
550
750
1000
mV
mV
mV
mV
mV
V/V
mA
mA
%/°C
µA
mV
NOTES
*Denotes the specifications that apply over the full operating temperature range.
1
This specification guarantees that both the high and low trip point of the comparator fall within the 210 mV to 230 mV range.
2
This specification guarantees that the output voltage of the fixed versions will always fall within the specified range. The waveform at the sense pin will exhibit a saw-
tooth shape due to the comparator hysteresis.
3
100 kΩ resistor connected between a 5 V source and the A0 pin.
4
The ADP1110 is guaranteed to withstand continuous application of +1.6 V applied to the GND and SW2 pins while V
IN
, I
LIM
, and SW1 pins are grounded.
Specifications subject to change without notice.
This information applies to a product under development. Its characteristics and specifications are subject to change without notice.
Analog Devices assumes no obligation regarding future manufacture unless otherwise agreed to in writing.
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