AIC1631ACN [AIC]
2-Cell, 500mA, Step-Up DC/DC Converter; 2节， 500毫安，升压型DC / DC转换器
| 型号： | AIC1631ACN |
| 厂家： | 
ANALOG INTERGRATIONS CORPORATION |
| 描述： | 2-Cell, 500mA, Step-Up DC/DC Converter |
| 文件： | 总10页 (文件大小：286K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
AIC1631
2-Cell, 500mA, Step-Up DC/DC Converter
ꢀDESCRIPTION
ꢀFEATURES
High Efficiency 90%.
ꢀ
The AIC1631 is a high efficiency step up DC-
Adjustable Output Voltage with Two Resistors
ꢀ
DC converter. Only four external components
are required to deliver a fixed voltage of 3V,
3.3V, or 5V. The output voltage can be exter-
nally set to an arbitrary value below breakdown
voltage of the power switch for AIC1631A. Effi-
ciency beyond 87% can be easily achieved at
100mA load with 2.2V to 3V input voltages.
(AIC1631A)
Power-Saving Shutdown Mode (7µA typical).
Internal 2A Switch.
120KHz Switching Rate.
Adjustable Switch Current Limit.
On-Chip Low Battery Detector.
ꢀ
ꢀ
ꢀ
ꢀ
ꢀ
Logic-controlled shutdown mode is provided for
power saving. Switch current limit can be pro-
grammed with a resistor. The low battery de-
tector can be configured as a linear regulator or
a burst mode controller performing an extremely
low supply current operation.
ꢀAPPLICATIONS
Palmtop & Notebook Computers.
ꢀ
Pocket Organizers.
ꢀ
Cameras.
ꢀ
Pagers.
ꢀ
Battery Backup Supplies.
ꢀ
Portable Instruments.
ꢀ
120KHz switching rate reduces the inductor size.
Inductors of 25µH to 50µH inductance are re-
commended for most applications.
ꢀTYPICAL APPLICATION CIRCUIT
100Ω
NORMAL
RILIM
+VIN
R1
50µH
+
ILIM/SD
VIN
VOUT
LBI
C1
100µF
SD
L
1N5819
D1
+VOUT
SW
LBO
+
(3.3V)
LOAD
C2
100µF
SGND
CGND
Note: VIN≥1.8V, VOUT≤7V
AIC1631
High Efficiency Step-Up DC/DC Converter
Analog Integrations Corporation 4F, 9, Industry E. 9th Rd, Science Based Industrial Park, Hsinchu Taiwan, ROC
DS-1631-04 Dec 27, 00 TEL: 886-3-5772500 FAX: 886-3-5772510
www.analog.com.tw
1
AIC1631
ꢀORDERING INFORMATION
AIC1631 XXX
PIN CONFIGURATION
ORDER NUMBER
AIC1631CN
TOP VIEW
PACKAGE TYPE
N: PLASTIC DIP
S: SMALL OUTLINE
AIC1631-3CN
AIC1631-5CN
VOUT
LBI
ILIM/SD
1
2
3
4
8
7
6
5
)
VIN
SW
(PLASTIC DIP
LBO
TEMPERATURE RANGE
AIC1631CS
C=0°C~+70°C
SGND
CGND
AIC1631-3CS
AIC1631-5CS
(PLASTIC SO)
OUTPUT VOLTAGE
DEFAULT: 3.3V
3: 3.0V
5: 5.0V
AIC1631ACN
(PLASTIC DIP
TOP VIEW
ILIM/SD
A: Adjustable
)
VOUT
LBI
1
2
3
4
8
7
6
5
VIN
EXT
GND
AIC1631ACS
LBO
FB
(PLASTIC SO)
ꢀABSOLUTE MAXIMUM RATINGS
Supply Voltage ......................................…………....................…………....................... 7.0V
Operating Temperature Range.....................……..............………................... -20°C ~ 80°C
Storage Temperature Range .......................………...................………....... -65°C ~ 150°C
ꢀTEST CIRCUIT
Refer to Typical Application Circuit.
ꢀELECTRICAL CHARACTERISTICS
(VIN=3.0V, Ta=25°C, unless otherwise specified.)
PARAMETER
TEST CONDITIONS
MIN.
TYP.
MAX. UNIT
Input Voltage
Fig. 4 in Appl. Examples
1.5
7
V
Output Voltage
ILOAD =200mA
AIC1631
3.16
2.88
4.80
3.3
3
5
3.44
3.12
5.20
V
AIC1631-3
AIC1631-5
Switch off Current
No Load Current
105
140
µA
µA
AIC1631/AIC1631-3
AIC1631-5
160
180
Shutdown Mode Current
Shutdown Recovery Time
7
15
µA
VIN=2.5V, ILOAD =200mA
0.4
mS
2
AIC1631
ꢀELECTRICAL CHARACTERISTICS
(CONTINUED)
PARAMETER
TEST CONDITIONS
MIN.
TYP.
MAX. UNIT
Efficiency
ILOAD =200mA
87
90
%
AIC1631/AIC1631-3
AIC1631-5
Line Regulation
Load Regulation
ILOAD =100mA
0.6
0.5
0.8
%VOUT
AIC1631, VIN=1.8 ~ 3.3V
AIC1631-3, VIN=1.8 ~ 3V
AIC1631-5, VIN=2.2 ~ 3.3V
ILOAD =10~300mA
AIC1631/AIC1631-3
AIC1631-5
0.3
0.8
%VOUT
Oscillator Frequency
LBI Pin Trip Point
90
120
1.22
150
1.27
KHz
V
1.17
0.598
FB Threshold Voltage
SW “ON Resistance”
AIC1631A
0.617
0.636
V
AIC1631/AIC1631-3
AIC1631-5
0.5
0.4
Ω
LBO “ON Resistance”
SW Off Leakage
VIN=2V
45
Ω
1
µA
Input Pin Bias Current
Output Pin Leakage
10
10
nA/Pin
nA/Pin
ꢀTYPICAL PERFORMANCE CHARACTERISTICS
Switch Voltage vs. Current
AIC1631/1631-3
SW ON Resistance vs. Temperature
1
0.58
Ta=25°C
.0.54
AIC1631/1631-3
0.75
0.5
0.25
0
AIC1631-5
0.5
AIC1631-5
0.46
0.42
0.38
0.36
0
20
40
60
80
0
0.5
1
1.5
2
2.5
3
ISW (A)
Temperature (°C)
3
AIC1631
ꢀTYPICAL PERFORMANCE CHARACTERISTICS
(CONTINUED)
No Load Supply Current vs. Temperature
No Load Supply Current vs. Input Voltage
200
190
180
170
160
150
140
210
Ta=25°C
200
190
180
170
160
150
AIC1631-5
AIC1631-5
AIC1631/1631-3
AIC1631/1631-3
80
60
40
0
20
1
1.5
2.0
2.5
3.0
3.5
4.0
4.5
5.0
VIN (V)
Temperature (°C)
Shutdown Mode Supply Current vs. Input Voltage
Shutdown Mode Supply Current vs. Temperature
VIN=3V
9.4
8.2
Ta=25°C
8.0
7.8
7.6
7.4
7.2
7.0
9.0
6.6
8.2
7.8
7.4
7.0
1
1.5
2
2.5
3.5
4
4.5
5
VIN3(V)
0
20
40
60
80
Temperature (°C)
Oscillator Frequency vs. Temperature
VIN=3V
Oscillator Frequency vs. Input Voltage
123
121
119
117
130
110
Ta=25°C
90
70
60
1
2
4
5
VI3N (V)
0
20
40
60
80
Temperature (°C)
4
AIC1631
ꢀTYPICAL PERFORMANCE CHARACTERISTICS
(CONTINUED)
Maximum Load Current vs. Switch Current Limit
Resistance
Maximum Load Current vs. Switch Current Limit
Resistance
600
500
400
300
200
100
0
600
500
400
300
200
100
0
AIC1631/1631-3
AIC1631/1631-3
Ta=25 C
°
Ta=25 C
°
(5% VOUT Drop)
(5% VOUT Drop)
VIN=2.7V
VIN=2.2V
VIN=2.2V
VIN=2.5V
VIN=1.8V
VIN=2.5V
VIN=2.0V
VIN=1.8V
VIN=2.0V
0
200
400
600
800
1000
0
50
100
150
200
RILIM (KΩ)
RILIM (KΩ)
ꢀBLOCK DIAGRAM
-
VOUT
ILIM/SD
VIN
Current Limit
+
0.617V
-
LBI
-
100mV
+
Shutdown
1.22V
A
+
SW
LBO
OSC
SGND
CGND
5
AIC1631
ꢀPIN DESCRIPTIONS
AIC1631/ AIC1631-3 / AIC1631-5
AIC1631A
PIN 1: ILIM/SD- 1. Connected to VIN pin
through a resistor to set the
switch peak current. It
serves to protect IC and in-
ductor, as well as to im-
prove efficiency and output
ripples. However, supply
capability of the AIC1631 is
limited by the current limit
resistor. (See typical per-
formance characteristics).
The ILIM/SD pin should be
shorted to VIN pin if limiting
on switch peak current is
not intended.
PIN 1: ILIM/SD-
1. Connected to VIN pin
through a resistor to set the
switch peak current. It serves to
protect IC and inductor, as well
as to improve efficiency and
output ripples. However, supply
capability of the AIC1631A is
limited by the current limit resis-
tor. (See typical performance
characteristics). The ILIM/SD pin
should be shorted to VIN pin if
limiting on switch peak current is
not intended.
2. The AIC1631A goes in shut-
down mode and consumes less
than 10µA when ILIM/SD pin is
pulled to ground.
2. The AIC1631 goes in shut-
down mode and consumes
less than 10µA when
ILIM/SD pin is pulled to
ground.
PIN 2: VIN
PIN 3: SW
-
-
Input supply.
Drain of the power switch, to be
connected to inductor/ diode.
PIN 2: VIN
PIN 3: SW
-
-
Input supply.
PIN 4: GND
PIN 5: FB
-
-
Ground.
Output voltage can either be
Drain of the power switch, to
be connected to inductor/ di-
ode.
internally set to
5
volt by
grounding FB pin, or be exter-
nally set to an arbitrary voltage
by applying to FB pin the divider
voltage of two divider resistors.
PIN 4:SGND - Ground connected to source of
power switch.
VOUT voltage is given by the
following equation:
PIN 5:CGND - Ground for control circuits of
the IC. It should be separated
from SGND to avoid the inter-
ference.
R1 VOUT
=
−1
R2 0.617
where R1 = Resistor connected
between FB pin and VOUT pin.
PIN 6:LBO
-
Open drain output of the bat-
tery low detector, with 45Ω
“ON resistance” at VIN=2V. It is
pulled low when the voltage on
LBI pin is below 1.22V.
R2= Resistor connected be-
tween FB pin and ground.
VOUT=Output voltage to be set.
PIN 7:LBI
-
The noninverting input of the
battery low detector, of which
the inverting input is internally
connects to 1.22V voltage ref-
erence.
PIN 6: LBO
-
Open drain output of the battery
low detector, with 45Ω “ON re-
sistance” at VIN=2V. It is pulled
low when the voltage on LBI pin
is below 1.22V.
PIN 8:VOUT - The output voltage feedbacks
to the IC through this pin.
6
AIC1631
AIC1631A (continued)
PIN 7: LBI - The noninverting input of the
battery low detector, of which the
inverting input is internally con-
nects to 1.22V voltage reference.
PIN 8: VOUT- The output voltage feedbacks to
the IC through this pin. If output
voltage was externally set, the
VOUT pin can be tied to any low
impedance node with voltage
between the external power
switch threshold and 7V
ꢀAPPLICATION EXAMPLES
90
85
80
75
+VIN
+VOUT
(+3V)
22Ω
VIN=3.3V
VIN=3.0V
27K
R2
R1
+
ILIM/SD
VIN
VOUT
LBI
+
47µF
LOAD
100µF
VIN=2.5V
C1
C2
VIN=1.8V
VIN=2.2V
VIN=2.0V
SW
LBO
+
OSCON
100µF
C3
SGND
CGND
1N5819
D1
AIC1631-3
300
0
100
200
400
500
600
Load Current (mA)
Fig. 1 3V Output Step-Up Converter
95
+VIN
+VOUT
(+5V)
27K
VIN=5.0V
VIN=4.5V
VIN=4.0V
22Ω
R2
90
R1
+
ILIM/SD
VIN
VOUT
LBI
+
47µF
LOAD
100µF
VIN=3.0V
85
C1
C2
VIN=2.2V
VIN=2.0V
SW
LBO
VIN=2.5V
80
75
+
SGND
CGND
OSCON
100µF
C3
1N5819
D1
AIC1631-5
400
500
600
0
100
300
700
200Load Current (mA)
Fig. 2 5V Output Step-Up Converter
7
AIC1631
ꢀAPPLICATION EXAMPLES
(CONTINUED)
80
75
70
65
+VOUT
VIN=1.4V
VIN=1.2V
(+3V)
100Ω
+VIN
R1
VIN=1.6V
VIN=1.0V
ILIM/SD
VOUT
LBI
+
C1
VIN
47µF
10µF
LOAD
L1
SW
LBO
1N5819
D1
SGND
CGND
+
100µF
AIC1631-3
0
2
4
6
8
10
12
C2
Load Current (mA)
Fig. 3 1-Cell Input 3V Output Step-Up Converter
+VOUT
R1
(+5V)
+VIN
100Ω
80
+
ILIM/SD
VIN
VOUT
LBI
VIN=1.6V
47µH
L1
10µF
75
70
65
C1
VIN=1V
VIN=1.4V
VIN=1.2V
LOAD
SW
LBO
1N5819
SGND
CGND
D1
+
100µF
AIC1631-5
C2
0
2
4
6
8
10
12
Load Current (mA)
Fig. 4 1-Cell Input 5V Output Step-Up Converter
2SB1424
Q1
+VOUT
15K
R5
(+5V)
94
90
+VIN
VIN=5V
VIN=4V
27K
R2
100Ω
R1
86
82
62K
R3
RB
12K
ILIM/SD
VIN
VOUT
LBI
+
+
VIN=3V
VIN=6V
500µH
L1
+
78
74
70
66
62
58
C2
C1
220µF
10µF
100µF
VIN=7V
VIN=8V
SW
LBO
C4
20K
R4
LOAD
+
SGND
CGND
1N5819
D1
100µF
0
50
100
150
200
250
300
350
400
C2
AIC1631-5
Load Current (mA)
Fig. 5 4-Cell Input Step-Up / Step-Down Converter
8
AIC1631
ꢀAPPLICATION EXAMPLES
(CONTINUED)
+VIN
+VOUT
100Ω
130
110
VIN=2.0V
VIN=2.5V
(+5V)
R1
D2
50µH
1M
R3
1M
R2
680K
R4
ILIM/SD
VIN
VOUT
LBI
L1
VIN=1.8V
LOAD
1N4148
90
70
50
+
C2
47µF
VIN=3V
15nF
C4
Q1
2N3904
SW
LBO
1N5819
D1
SGND
CGND
Q2
2N3904
+
30
10
100µF
AIC1631-5
+
C1
C3
*CTL
* CTL= GND in Burst Mode
0
10
20
30
40
1µF
CTL=VIN in Normal Mode
Load Current ( A)
µ
Fig. 6 Low Supply Current Burst Mode Step-Up Converter
+VOUT
+VIN
+
22Ω
R1
27K
R2
ILIM/SD VOUT
+
100µF
47µF
C1
VIN
LBI
LOAD
C2
R1
R2
SW
LBO
FB
GND
+
OSCON
100µF
C3
1N5819
D1
Fig.7 Adjustable Output Voltage Step-Up Converter
9
AIC1631
ꢀPHYSICAL DIMENSION
ꢀ
8 LEAD PLASTIC SO (unit: mm)
D
SYMBOL
MIN
1.35
0.10
0.33
0.19
4.80
3.80
MAX
1.75
0.25
0.51
0.25
5.00
4.00
A
A1
B
C
D
E
H
E
e
e
1.27(TYP)
A
H
L
5.80
0.40
6.20
1.27
C
B
L
ꢀ
8 LEAD PLASTIC DIP (unit: mm)
SYMBOL
MIN
0.381
2.92
0.35
0.20
9.01
7.62
6.09
MAX
—
D
A1
A2
b
C
D
E
E1
e
eB
L
4.96
0.56
0.36
10.16
8.26
7.12
E1
E
A2
A1
L
C
2.54 (TYP)
—
2.92
eB
10.92
3.81
e
b
10
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