AIC1630
2-Cell, Step-Up DC/DC Converter Controller
Analog Integrations Corporation
4F, 9, Industry E. 9th Rd, Science Based Industrial Park, Hsinchu Taiwan, ROC
www.analog.com.tw
DS-1630-05
TEL: 886-3-5772500
FAX: 886-3-5772510
1
FEATURES
Adjustable Output Voltage with Two Resistors
(AIC1630A).
Power-Saving Shutdown Mode (7
µA typical).
120KHz Switching Rate.
On-Chip Low Battery Detector.
APPLICATIONS
Palmtop & Notebook Computers.
Battery Charger Supply.
Cellular Telephone.
LCD Contrast Supply.
Flash Memory Programmer.
Battery Backup Supplies.
Portable Instruments.
DESCRIPTION
The AIC1630 is a DC-DC converter designed to
drive an external power switch for more flexibility,
especially in higher voltage and larger power
applications. Typically six components are
required to set up a step up configuration easily
achieving efficiency beyond 80%. A few more
components are required to set up a step down
configuration delivering 4A load current with 83%
typical efficiency, 86% at 2A load, and 300
µA
quiescent current.
The output voltage is internally set to 3V, 3.3V, 5V
or externally set to an arbitrary value below
breakdown voltage of the power switch. Logic-
controlled shutdown mode is provided for power
saving. The low battery detector can be also
configured as a linear regulator.
120KHz switching rate reduces the inductor size.
Inductors of 25
µH to 50µH inductance are
recommended for most applications.
TYPICAL APPLICATION CIRCUIT
D1
1N5819
+V
OUT
3.3V
C1
100
R3
+V
IN
50
µ
H
5nF C2
270
R4
LOAD
100
µ
F
C3
2S
C
4
6
7
2
Q1
1
AIC1630
SD
VIN
EXT
SGND
VOUT
LBI
LBO
CGND
L
+
100
µ
F
Note : V
IN
1.8V , V
OUT
7V
High Efficiency Step-Up DC/DC Converter
AIC1630
2
ORDERING INFORMATION
PACKAGE TYPE
N: PLASTIC DIP
S: SMALL OUTLINE
TEMPERATURE RANGE
C=0
°C~+70°C
OUTPUT VOLTAGE
DEFAULT: 3.3V
3: 3.0V
5: 5.0V
A: Adjustable
ORDER NUMBER
AIC1630CN
AIC1630-3CN
AIC1630-5CN
(PLASTIC DIP
)
PIN CONFIGURATION
AIC1630CS
AIC1630-3CS
AIC1630-5CS
(PLASTIC SO)
TOP VIEW
LBO
1
3
4
2
8
6
5
7
VOUT
VIN
EXT
GND
LBI
FB
SD
AIC1630ACN
(PLASTIC DIP
)
AIC1630ACS
(PLASTIC SO)
TOP VIEW
LBO
1
3
4
2
8
6
5
7
VOUT
VIN
EXT
SGND
LBI
CGND
SD
AIC1630 XXX
ABSOLUTE MAXIMUM RATINGS
Supply Voltage .......................................................................................... 7.0V
DC Voltage Applied On All Other Pins ............................................................ 7.0V
Operating Temperature Range ............................................................. -20
°C~80°C
Storage Temperature Range .......................................................... -65
°C ~150°C
TEST CIRCUIT
Refer to Typical Application Circuit.
AIC1630
3
ELECTRICAL CHARACTERISTICS
(V
IN
=3.0V, Ta=25
°
°
°
°C, unless otherwise
specified.)
PARAMETER
TEST CONDITIONS
MIN.
TYP.
MAX.
UNIT
Input Voltage
1.8
7
V
Default Output Voltage
I
L
=200mA
AIC1630
AIC1630-3
AIC1630-5
3.16
2.88
4.80
3.3
3.0
5.0
3.44
3.12
5.20
V
Switch Off Current
105
140
µA
Shutdown Mode Current
7
15
µA
Recovery Time from Shutdown
V
IN
=2.5V, I
L
=200mA
0.4
mS
Efficiency
I
L
=300mA
Fig. 1 in Appl. Examples
85
%
Line Regulation
V
IN
=2.2~3.3V
V
OUT
=5V, I
L
=100mA
0.6
%V
OUT
Load Regulation
I
L
=10mA~500mA
V
OUT
=5V
2.5
%V
OUT
Oscillator Frequency
90
120
150
KHz
LBI Pin Trip Point
1.17
1.22
1.27
V
FB Threshold Voltage
AIC1630A
0.598
0.617
0.636
V
EXT Pin Driving Capability
Pin 8=5V, Pin 3= 0.85V
Sourcing
Sinking
80
50
mA
mA
LBO "ON Resistance"
V
IN
=2V
45
Input Pin Bias Current
10
nA/Pin
Output Pin Leakage
10
nA/Pin
AIC1630
4
TYPICAL PERFORMANCE CHARACTERISTICS
0.6
0.8
1
1.2
1.4
1.6
1.8
EXT Pin Voltage (V)
20
30
40
50
60
70
80
85
Ext Pin Sourcing Capability
V
OUT
=5V
Ta=25
°C
EX
T
(
m
A
)
V
OUT
=3V
0
10
20
30
40
50
60
70
80
30
40
50
60
70
80
90
Ext Pin Sourcing Capability vs Temperature
Temperature (
°C)
EXT
(m
A)
V
OUT
=5V
Ext Pin Voltage=0.85V
V
OUT
=3V
EXT Pin Voltage (V)
35
40
45
50
55
60
65
70
75
80
85
0.6
0.8
1
1.2
1.4
1.6
1.8
2.0
Ta=25
°C
V
OUT
=5V
Ext Pin Sinking Capability
EX
T
(
m
A)
V
OUT
=3V
0
10
20
30
40
50
60
70
80
35
37
39
41
43
45
47
49
51
53
55
Ext Pin Sinking Capability vs Temperature
Temperature (
°C)
EXT
(m
A
)
V
OUT
=5V
Ext Pin Voltage=0.85V
V
OUT
=3V
1.5
2
2.5
3
3.5
4
4.5
5
V
IN
(V
)
75
80
85
90
95
100
105
110
Switch off Supply Current vs Input Voltage
Ta=25
°C
IS (
µ
A)
Switch Off Supply Current vs Temperature
0
10
20
30
40
50
60
70
80
Temperature (
°C)
90
95
100
105
110
115
120
S
(µ
A
)
V
IN
=3V
AIC1630
5
TYPICAL PERFORMANCE CHARACTERISTICS
(CONTINUED)
V
IN
(V)
7
7.2
7.4
7.6
7.8
8
8.2
1
1.5
2
2.5
3
3.5
4
4.5
5
Ta=25C
Shutdown Mode Supply Current vs Input Voltage
Is
(µ
A)
Shutdown Mode Supply Current vs Temperature
Temperature (
°C)
0
10
20
30
40
50
60
70
80
7
7.4
7.8
8.2
8.6
9
9.4
V
IN
=3V
IS
(µ
A)
Oscillator Frequency vs Input Voltage
V
IN
(V)
60
70
80
90
100
110
120
130
1
1.5
2
2.5
3
3.5
4
4.5
5
Ta=25
°C
F
r
eq
uency
(
K
Hz)
Oscillator Frequency vs Temperature
Temperature (
°C)
117
118
119
120
121
122
123
0
10
20
30
40
50
60
70
80
V
IN
=3V
Fr
e
q
uen
c
y
(
KHz
)
BLOCK DIAGRAM
1.22V
+
-
FB
LBO
LBI
VOUT
100mV
-
+
FB EXT=LOW
FB EXT=HIGH
0.617V
+
-
OSC
GND
100mV
Shutdown
-
+
SD
VIN
EXT
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