AIC1630/AIC1630A
Step-Up DC/DC Controller
DS-1630-06 012102
1
n
FEATURES
l
Adjustable Output Voltage with Two Resistors
(AIC1630A).
l
Power-Saving Shutdown Mode (7
µ
A typical).
l
120KHz Switching Rate.
l
On-Chip Low Battery Detector.
n
APPLICATIONS
l
Palmtop & Notebook Computers.
l
Battery Charger Supply.
l
Cellular Telephone.
l
LCD Contrast Supply.
l
Flash Memory Programmer.
l
Battery Backup Supplies.
l
Portable Instruments.
n
DESCRIPTION
The AIC1630 is a DC-DC controller 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
µ
A
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 22
µ
H to 47
µ
H inductance are
recommended for most applications.
AIC1630/AIC1630A
2
n
TYPICAL APPLICATION CIRCUIT
D1
1N5819
+V
OUT
3.3V
C1
100
R3
+V
IN
47
µ
H
5nF C2
270
R4
LOAD
100
µ
F
C3
2SC4672
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
D1
1N5819
+V
OUT
3.3V
C1
100
R3
+V
IN
47
µ
H
5nF C2
270
R4
LOAD
100
µ
F
C3
2SC4672
Q1
... 1
AIC1630A
SD
VIN
EXT
GND
VOUT
LBI
LBO
FB
L
+
100
µ
F
R2
10K
R1
43.5K
Note : V
IN
2.2V
High Efficiency Step-Up DC/DC Converter
AIC1630/AIC1630A
3
n
ORDERING INFORMATION
LBO
1
3
4
2
8
6
5
7
VOUT
VIN
EXT
GND
LBI
FB
SD
LBO
1
3
4
2
8
6
5
7
VOUT
VIN
EXT
SGND
LBI
CGND
SD
PACKING TYPE
TR: TAPE & REEL
TB: TUBE
PACKAGE TYPE
N: PLASTIC DIP
S: SMALL OUTLINE
OUTPUT VOLTAGE
DEFAULT:3.3V
3: 3.0V
5: 5.0V
A: ADJUSTABLE
AIC1630-XCXXX
EX: AIC1630-3CSTR
à
3.0V Version, in SO8 Package & Tape &
Reel Packing Type
PIN CONFIGURATION
DIP-8
SO-8
TOP VIEW
DIP-8
SO-8
TOP VIEW
Adjustable Version
n
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
n
TEST CIRCUIT
Refer to Typical Application Circuit.
AIC1630/AIC1630A
4
n
ELECTRICAL CHARACTERISTICS
(V
IN
=3.0V, T
A
=25
°
C, unless otherwise
specified.)
PARAMETER
TEST CONDITIONS
MIN.
TYP.
MAX.
UNIT
Input Voltage
1.8
7
V
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
µ
A
Shutdown Mode Current
7
15
µ
A
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
Sourcing, Pin 3= 0.85V
Sinking, Pin 3= 4.15V
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/AIC1630A
5
n
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
Fig. 1 Ext Pin Sourcing Capability
V
OUT
=5V
T
A
=25
°
C
EXT (
mA)
V
OUT
=3V
0
10
20
30
40
50
60
70
80
30
40
50
60
70
80
90
Fig. 2 Ext Pin Sourcing Capability vs. Temperature
Temperature (
°
C)
EXT
(
mA)
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
T
A
=25
°
C
V
OUT
=5V
Fig. 3 Ext Pin Sinking Capability
EXT (
mA)
V
OUT
=3V
0
10
20
30
40
50
60
70
80
35
37
39
41
43
45
47
49
51
53
55
Fig. 4 Ext Pin Sinking Capability vs. Temperature
Temperature (
°
C)
EXT
(
mA)
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
Fig. 5 Switch off Supply Current vs. Input Voltage
T
A
=25
°
C
I
S
(
µ
A)
Fig. 6 Switch Off Supply Current vs. Temperature
0
10
20
30
40
50
60
70
80
Temperature (
°
C)
90
95
100
105
110
115
120
I
S
(
µ
A)
V
IN
=3V
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