General Description
The AAT1230 is a high frequency, high efficiency
boost converter capable of 18V maximum output
voltage. The internal power switch can deliver
100mA load current. It is the ideal power solution to
power OLED, LCD, and CCD applications operat-
ing from a single cell lithium-ion battery.
Hysteretic control provides up to 2MHz switching
frequency and fast response to load transients with
small, low-cost external components. The fully
integrated control IC simplifies the design while
reducing the total PCB footprint. The AAT1230
offers a true load disconnect feature which isolates
the load from the power source when EN/SET is
pulled low. This eliminates leakage current and
maintains zero voltage at the output while disabled.
The output voltage can be dynamically set by acti-
vating one of two reference levels (FB1 or FB2)
through the SEL logic pin. Optionally, AnalogicTech's
Simple Serial ControlTM (S
2
CwireTM) single wire
interface provides dynamic programmability across
a wide output voltage range through the EN/SET pin.
The AAT1230 is available in a Pb-free, thermally-
enhanced 16-pin 3x4mm TDFN low-profile pack-
age or a Pb-free 12-pin TSOPJW package.
Features
V
IN
Range: 2.7V to 5.5V
Maximum Output: 18V @ 100mA
True Load Disconnect
Dynamic Voltage Control Options
Hysteretic Control
-- No External Compensation Components
-- Excellent Load Transient Response
-- High Efficiency at Light Load
Up to 2MHz Switching Frequency
Ultra-Small Inductor and Capacitors
Integrated Low R
DS(ON)
MOSFET Switches
Up to 85% Efficiency
<1A Shutdown Current
Integrated Soft Start
Cycle-by-Cycle Current Limit
Short-Circuit, Over-Temperature Protection
Available in TSOPJW-12 or TDFN34-16
Package
-40C to +85C Temperature Range
Applications
CCD Bias Circuit
Digital Still Cameras
LCD Bias Circuit
Mobile Handsets
MP3 Players
OLED Displays
PDAs and Notebook PCs
AAT1230
18V 100mA Step-Up Converter
Typical Application
LIN
EN/SET
PGND
VP
C
1
2.2F
L
1
2.2H
D
1
Schottky
R
1
78.7k
R
2
562
C
2
2.2F, 25V
R
3
4.99k
Input:
Enable/Set
Select
2.7V~5.5V
AAT1230
SW
FB1
FB2
SEL
18V @ 100mA
VIN
GND
1230.2006.03.1.0
1
SwitchReg
TM
Pin Descriptions
Pin Configuration
TSOPJW-12
TDFN34-16
(Top View)
(Top View)
FB1
FB2
GND
LIN
LIN
3
PGND
PGND
PGND
EN/SET
SEL
VIN
VP
VP
N/C
SW
SW
4
5
1
2
6
7
8
14
13
12
16
15
11
10
9
1
2
3
4
5
6
12
11
10
9
8
7
VP
EN/SET
SEL
VIN
N/C
SW
LIN
FB1
FB2
GND
PGND
SW
Pin #
TSOPJW-12
TDFN34-16
Symbol
Function
1
15, 16
VP
Input power pin; connected to the source of the P-channel MOSFET.
Connect to the input capacitor(s).
2
14
EN/SET
IC active high enable pin. Alternately, input pin for S
2
Cwire control uti-
lizing FB2 reference.
3
13
SEL
Logic high selects FB1 high output reference; logic low selects FB2 low
output reference. Pull low for S
2
Cwire control.
4
12
VIN
Input voltage for the converter. Connect this pin directly to the VP pin.
5
11
N/C
No connection.
6, 7
9, 10
SW
Boost converter switching node. Connect the power inductor between
this pin and LIN pin.
8
6, 7, 8
PGND
Power ground for the boost converter; connected to the source of the
N-channel MOSFET. Connect to the input and output capacitor return.
9
5
GND
Ground pin.
10
4
FB2
Feedback pin for low output voltage set point. Pin set to 0.6V when
SEL is low and disabled when SEL is high. Voltage is set from 0.6V to
1.2V with S
2
Cwire control.
11
3
FB1
Feedback pin for high output voltage set point. Pin set to 1.2V when
SEL is high and disabled when SEL is low. Disabled with S
2
Cwire
control.
12
1, 2
LIN
Switched power input. Connected to the power inductor.
N/A
EP
Exposed paddle (bottom). Tied to SW pins. May be connected to SW
pins or left floating.
AAT1230
18V 100mA Step-Up Converter
2
1230.2006.03.1.0
Absolute Maximum Ratings
1
T
A
= 25C, unless otherwise noted.
Recommended Operating Conditions
Symbol
Description
Value
Units
JA
Thermal Resistance
TDFN34-16
44
C/W
TSOPJW-12
160
P
D
Maximum Power Dissipation (T
A
= 25C)
TDFN34-16
2270
mW
TSOPJW-12
625
T
J
Operating Temperature Range
-40 to 150
C
Symbol
Description
Value
Units
V
IN
Input Voltage
-0.3 to 6.0
V
SW
Switching Node
20
V
L
IN
, EN/SET,
Maximum Rating
V
IN
+ 0.3
V
SEL, FB1, FB2
T
J
Operating Temperature Range
-40 to 150
C
T
S
Storage Temperature Range
-65 to 150
C
T
LEAD
Maximum Soldering Temperature (at leads, 10 sec)
300
C
AAT1230
18V 100mA Step-Up Converter
1230.2006.03.1.0
3
1. Stresses above those listed in Absolute Maximum Ratings may cause permanent damage to the device. Functional operation at condi-
tions other than the operating conditions specified is not implied. Only one Absolute Maximum Rating should be applied at any one time.
Electrical Characteristics
1
T
A
= -40C to +85C, unless otherwise noted. Typical values are T
A
= 25C, V
IN
= 3.6V.
Symbol
Description
Conditions
Min
Typ
Max
Units
Power Supply
V
IN
Input Voltage Range
2.7
5.5
V
V
OUT(MAX)
Maximum Output Voltage
18
V
V
IN
Rising
2.7
V
V
UVLO
UVLO Threshold
Hysteresis
150
mV
V
IN
Falling
1.8
V
SEL = GND, V
OUT
= 14V,
2.0
mA
I
Q
Quiescent Current
I
OUT
= 0, Switching
2
SEL = GND, FB2 = 1.5V,
40
70
A
Not Switching
I
SHDN
V
IN
Pin Shutdown Current
EN/SET = GND
1.0
A
I
OUT
Output Current
2.7V < V
IN
< 5.5V, V
OUT
= 18V
100
mA
FB1
FB1 Reference Voltage
I
OUT
= 0 to 100mA, V
IN
= 2.7V
1.164
1.2
1.236
V
to 5.0V, SEL = High
FB2
FB2 Reference Voltage
I
OUT
= 0 to 100mA, V
IN
= 2.7V
0.582
0.6
0.618
V
to 5.0V, SEL = Low
V
LOADREG
Load Regulation
I
OUT
= 0 to 100mA
0.01
%/mA
V
LINEREG
/
Line Regulation
V
IN
= 2.7V to 5.5V
0.6
%/V
V
IN
R
DS(ON)L
Low Side Switch On Resistance
0.06
R
DS(ON)IN
Input Disconnect Switch
0.18
On Resistance
T
SS
Soft-Start Time
From Enable to Output Regulation;
350
s
V
OUT
= 15V
T
SD
Over-Temperature Shutdown
140
C
Threshold
T
HYS
Shutdown Hysteresis
15
C
I
LIM
N-Channel Current Limit
V
IN
= 3.6V
3.0
A
SEL, EN/SET
V
SEL(L)
SEL Threshold Low
V
IN
= 2.7V
0.4
V
V
SEL(H)
SEL Threshold High
V
IN
= 5.5V
1.4
V
V
EN/SET(L)
Enable Threshold Low
V
IN
= 2.7V
0.4
V
V
EN/SET(H)
Enable Threshold High
V
IN
= 5.5V
1.4
V
T
EN/SET LO
EN/SET Low Time
0.3
75
s
T
EN/SET HI MIN
Minimum EN/SET High Time
50
ns
T
EN/SET HI MAX
Maximum EN/SET High Time
75
s
T
OFF
EN/SET Off Timeout
500
s
T
LAT
EN/SET Latch Timeout
500
s
I
EN/SET
EN/SET Input Leakage
-1
1
A
AAT1230
18V 100mA Step-Up Converter
4
1230.2006.03.1.0
1. The AAT1230 is guaranteed to meet performance specifications from 0C to 70C. Specification over the -40C to +85C operating
temperature range is assured by design, characterization, and correlation with statistical process controls.
2. Total input current with prescribed FB resistor network can be reduced with larger resistor values.
AAT1230
18V 100mA Step-Up Converter
1230.2006.03.1.0
5
Typical Characteristics
DC Regulation
(V
OUT
= 12V)
Output Current (mA)
Output Error (%)
-1.0
-0.8
-0.6
-0.4
-0.2
0.0
0.2
0.4
0.6
0.8
1.0
0.1
1
10
100
V
IN
= 5V
V
IN
= 4.2V
V
IN
= 3.6V
V
IN
= 2.7V
Efficiency vs. Load
(V
OUT
= 12V)
Output Current (mA)
Efficiency (%)
20
30
40
50
60
70
80
90
0.1
1
10
100
V
IN
= 5V
V
IN
= 4.2V
V
IN
= 3.6V
DC Regulation
(V
OUT
= 15V)
Output Current (mA)
Output Error (%)
-1.0
-0.8
-0.6
-0.4
-0.2
0.0
0.2
0.4
0.6
0.8
1.0
0.1
1
10
100
V
IN
= 5V
V
IN
= 4.2V
V
IN
= 3.6V
V
IN
= 2.7V
Efficiency vs. Load
(V
OUT
= 15V)
Output Current (mA)
Efficiency (%)
V
IN
= 5V
20
30
40
50
60
70
80
90
0.1
1
10
100
V
IN
= 4.2V
V
IN
= 3.6V
DC Regulation
(V
OUT
= 18V)
Output Current (mA)
Output Error (%)
-1.0
-0.8
-0.6
-0.4
-0.2
0.0
0.2
0.4
0.6
0.8
1.0
0.1
1
10
100
V
IN
= 5V
V
IN
= 4.2V
V
IN
= 3.6V
V
IN
= 2.7V
Efficiency vs. Load
(V
OUT
= 18V)
Output Current (mA)
Efficiency (%)
20
30
40
50
60
70
80
90
0.1
1
10
100
V
IN
= 5V
V
IN
= 4.2V
V
IN
= 3.6V
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