AIC AIC1630ACN 2-cell, step-up dc/dc converter controller Datasheet

AIC1630
2-Cell, Step-Up DC/DC Converter Controller
FEATURES
Adjustable Output Voltage with Two Resistors
(AIC1630A).
Power-Saving Shutdown Mode (7µA typical).
120KHz Switching Rate.
On-Chip Low Battery Detector.
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 300µA
quiescent current.
APPLICATIONS
Palmtop & Notebook Computers.
Battery Charger Supply.
Cellular Telephone.
LCD Contrast Supply.
Flash Memory Programmer.
Battery Backup Supplies.
Portable Instruments.
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. Logiccontrolled 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 25µH to 50µH inductance are
recommended for most applications.
TYPICAL APPLICATION CIRCUIT
+VIN
100Ω
+
50µH
R3
L
D1
1N5819
SD
VOUT
VIN
LBI
EXT
LBO
5nF C2
2SC4672
LOAD
100µF
C3
+VOUT
3.3V
C1
100µF
Q1
1
SGND
270Ω
R4
CGND
AIC1630
Note : VIN ≥ 1.8V , VOUT ≤ 7V
High Efficiency Step-Up DC/DC Converter
Analog Integrations Corporation
4F, 9, Industry E. 9th Rd, Science Based Industrial Park, Hsinchu Taiwan, ROC
DS-1630-05
TEL: 886-3-5772500
FAX: 886-3-5772510
www.analog.com.tw
1
AIC1630
ORDERING INFORMATION
AIC1630 XXX
ORDER NUMBER
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
AIC1630CN
AIC1630-3CN
AIC1630-5CN
(PLASTIC DIP )
AIC1630CS
AIC1630-3CS
AIC1630-5CS
(PLASTIC SO)
AIC1630ACN
(PLASTIC DIP )
AIC1630ACS
(PLASTIC SO)
PIN CONFIGURATION
TOP VIEW
SD 1
8
VOUT
VIN 2
7
LBI
EXT 3
6
LBO
5
CGND
SGND 4
TOP VIEW
SD 1
8
VOUT
VIN 2
7
LBI
EXT 3
6
LBO
GND 4
5
FB
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.
2
AIC1630
ELECTRICAL CHARACTERISTICS
specified.)
PARAMETER
Input Voltage
Default Output Voltage
Switch Off Current
Shutdown Mode Current
Recovery Time from Shutdown
Efficiency
Line Regulation
Load Regulation
Oscillator Frequency
LBI Pin Trip Point
FB Threshold Voltage
EXT Pin Driving Capability
LBO “ON Resistance”
Input Pin Bias Current
Output Pin Leakage
(VIN=3.0V, Ta=25°°C, unless otherwise
TEST CONDITIONS
IL=200mA
AIC1630
AIC1630-3
AIC1630-5
MIN.
1.8
TYP.
MAX.
7
3.16
2.88
4.80
3.3
3.0
5.0
105
7
0.4
85
3.44
3.12
5.20
140
15
VIN=2.5V, IL=200mA
IL=300mA
Fig. 1 in Appl. Examples
VIN=2.2~3.3V
VOUT=5V, IL=100mA
IL=10mA~500mA
VOUT=5V
AIC1630A
Pin 8=5V, Pin 3= 0.85V
Sourcing
Sinking
VIN=2V
90
1.17
0.598
UNIT
V
V
µA
µA
mS
%
0.6
%VOUT
2.5
%VOUT
120
1.22
0.617
150
1.27
0.636
KHz
V
V
10
10
mA
mA
Ω
nA/Pin
nA/Pin
80
50
45
3
AIC1630
TYPICAL PERFORMANCE CHARACTERISTICS
Ext Pin Sourcing Capability vs Temperature
Ext Pin Sourcing Capability
90
85
80
VOUT=5V
VOUT=5V
80
Ta=25°C
60
EXT(mA)
EXT (mA)
70
50
70
60
Ext Pin Voltage=0.85V
50
40
VOUT=3V
40
30
VOUT=3V
30
20
0.6
0.8
1
1.2
1.4
EXT Pin Voltage (V)
1.6
1.8
10
0
50
60
70
80
55
80
53
Ta=25°C
VOUT=5V
51
75
49
EXT(mA)
70
EXT (mA)
40
30
Ext Pin Sinking Capability vs Temperature
Ext Pin Sinking Capability
65
60
VOUT=5V
55
VOUT=3V
50
47
Ext Pin Voltage=0.85V
45
43
41
VOUT=3V
39
45
37
40
35
20
Temperature (°C)
85
35
0.6
0.8
1
1.2
1.4
1.6
1.8
2.0
0
10
20
30
Switch off Supply Current vs Input Voltage
110
50
60
70
80
Switch Off Supply Current vs Temperature
120
105
40
Temperature (°C)
EXT Pin Voltage (V)
115
VIN=3V
100
110
Ta=25°C
95
S (µA)
IS (µA)
105
90
100
85
95
80
75
1.5
2
2.5
3
3.5
VIN (V)
4
4.5
5
90
0
10
20
30
40
50
60
70
80
Temperature (°C)
4
AIC1630
TYPICAL PERFORMANCE CHARACTERISTICS (CONTINUED)
Shutdown Mode Supply Current vs Temperature
Shutdown Mode Supply Current vs Input Voltage
8.2
9.4
8
VIN=3V
9
Ta=25C
8.6
IS (µA)
Is (µA)
7.8
7.6
8.2
7.4
7.8
7.2
7.4
7
1
1.5
2
2.5
3
VIN (V)
3.5
4
4.5
7
5
0
10
20
30
40
50
60
70
80
Temperature (°C)
Oscillator Frequency vs Input Voltage
Oscillator Frequency vs Temperature
130
123
120
Frequency (KHz)
(KHz)
122
110
Ta=25°C
Frequency
100
90
80
120
119
118
70
60
VIN=3V
121
1
1.5
2
2.5
3
VIN (V)
3.5
4
4.5
5
117
0
10
20
30
40
50
60
70
80
Temperature (°C)
BLOCK DIAGRAM
-
SD
VOUT
Shutdown
100mV
+
LBI
VIN
FB EXT=LOW
-
EXT
1.22V
OSC
+
GND
0.617V
FB EXT=HIGH
+
+
-
LBO
FB
100mV
5
AIC1630
PIN DESCRIPTION
AIC1630/ AIC1630-3 / AIC1630-5
PIN 1: SD
-
The AIC1630 goes in shutdown
mode and consumes less than
10µA when SD pin is pulled to
ground and it goes in normal
operating mode when the SD pin
is pulled to a positive voltage
above 100mV.
PIN 2: VIN
-
Input supply.
PIN 3: EXT
-
Push-pull drive output to drive
external power switch.
PIN 4:SGND -
Ground connected to source of
power switch.
PIN 5:CGND -
Ground for control circuits of the
IC. It should be separated from
SGND to avoid the interference.
PIN 6:LBO
Open drain output of the battery
low detector, with 45Ω “ON
resistance” at VIN=2V. It is pulled
low when the voltage on LBI pin
is below 1.22V.
PIN 7:LBI
-
-
PIN 8:VOUT -
The noninverting input of the
battery low detector, of which the
inverting input is internally
connects to 1.22V voltage
reference.
The output voltage feedbacks to
the IC through this pin.
AIC1630A
PIN 1: SD
- The AIC1630A goes in shutdown
mode and consumes less than 10
µA when SD pin is pulled to
ground and it goes in normal
operating mode when the SD pin
is pulled to a positive voltage
above 100mV.
PIN 2: VIN
- Input supply.
PIN 3: EXT - Push-pull drive output to drive
external power switch.
PIN 4: GND - Ground.
PIN 5: FB
- Output voltage can either be
internally set to 5 volt by
grounding FB pin, or be externally
set to an arbitrary voltage by
applying to FB pin the divider
voltage of two divider resistors.
VOUT voltage is given by the
following equation:
R1 VOUT
=
−1
R2 0.617
where R1 = Resistor
connected
between FB pin and VOUT pin.
R2= Resistor connected between
FB pin and ground.
VOUT=Output voltage to be set.
PIN 6: LBO - Open drain output of the battery
low detector, with 45Ω “ON
resistance” at VIN=2V. It is pulled
low when the voltage on LBI pin is
below 1.22V.
PIN 7: LBI
- The noninverting input of the
battery low detector, of which the
inverting
input
is
internally
connects
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
6
AIC1630
APPLICATION EXAMPLES
VOUT
(+5V)
100Ω
VIN
95
R3
L
1N5819
VIN
LBI
LBO
SGND
2SC4672
Q1
C3
100µF
+
VOUT
EXT
5nF C2
D1
LOAD
SD
Eff iciency (% )
50µH
C1
90
100µF
+
V IN= 4.5V
85
80
V IN= 2.2V
V IN= 3.3V
V IN= 3V
75
V IN= 2V
70
CGND
270Ω
65
AIC1630-5
R4
60
0
100
200
300
400
500
600
700
800
Load Current (mA)
Fig. 1
5V Output Step-Up Converter
100Ω
VIN
(+12V)
85
VIN=5V
R3
+
C1
L
180K
D2
1N5819
D1
+
C3
LBO
80
VIN=3.3V
VIN=2.75V
75
1N4148
Note :
10K
R2
VIN=2.25V
70
AIC1630A
R4
VIN
FB
GND
1K
2SC4672
Q1
LOAD
EXT
R1
LBI
VIN
47µH
VIN=4.5V
VOUT
SD
220µF
Efficiency (%)
VOUT
100µF
OS-CON
0
30
60
90
120
150
180
210
240
270
Load Current (mA)
≥ 2.2V
Fig. 2
12V Output Step-Up Converter for Flash Memory
VS(+3/5V)
VOUT
95
(+36V)
V IN= 20V
C1
L
47µF
220µH
EXT
D1
+
C3
33µF
120Ω
R3
1M
LBO
GND
AIC1630A
90
R1
LBI
VIN
1N5819
LOAD
VOUT
SD
V IN= 16V
Ef ficiency (% )
+
VIN
2SC4672
Q1
FB
85
V IN= 12V
80
V IN= 8V
V IN= 6V
75
17.8K
R2
Vs= 5V
V IN= 5V
70
0
10
20
30
40
50
60
70
Load Current (mA)
Fig. 3
36V Output Step-Up Converter for Color LCD
7
AIC1630
APPLICATION EXAMPLES
10µF
C4
C1
+
C2
47µF
0.1µF
1N5819
D2
LOAD
+
2SC4672
Q1
VOUT
(-24V) C3
+ 47µF
88
C6
5nF
150µH
D3
1.2K R3
SD
VOUT
VIN
LBI
EXT
LBO
GND
FB
AIC1630A
C5
5nF
90K
2.4K
V IN= 15V
86
V IN= 10V
84
R1
Eff iciency (% )
L
D1
1N5819
(CONTINUED)
VS (+3/5V)
VIN
1N5819
V IN= 20V
82
V IN= 5V
80
78
76
74
R2
Vs= 5V
72
70
0
5
10
15
20
25
30
35
40
45
Load Current (mA)
Fig. 4
+
C3
D1
1N5819
10µF
C2
D2
2SC4672
Q1
10µF
+
5nF
78
220µF
L
150Ω
R4
R3
C4 + 33µF
VIN
LBI
EXT
LBO
90K
R1
74
V IN= 4V
72
V IN= 3V
70
68
66
64
FB
GND
AIC1630A
D4
1N5819
D3
C1
120Ω
1N5819
LOAD
VOUT
SD
V IN= 5V
Vs= 3V
76
+
Ef ficiency (% )
150µH
VOUT
(-24V) C5
-24V Output Inverting Converter for LCD
VS (+3/5V)
VIN
2.4K
62
R2
V IN= 2V
60
58
1N4148
56
0
5
10
15
20
25
Load Current (mA)
VOUT
(+12V)
2V Input 20mA Load -24V Output Inverting Converter for LCD
VIN
+
C3
L
47µF
C2
D2
C4
47µF
+
10µF
C5
+
95
V IN= 20V
C1
10µF
SD
2SC4672
Q1
+
VS (+3/5V)
+
50µH
D1
1N5819
VOUT
(-12V)
220µF
120Ω
R4
Fig. 6
VIN
LBI
EXT
LBO
180K
R1
430Ω
R3
1N5819
D3
VOUT
GND
FB
AIC1630A
D4
1N4148
10K
R2
90
Eff iciency (% )
Fig. 5
1N5819
V IN= 16V
85
V IN= 12V
80
V IN= 8V
V IN= 6V
75
Vs= 5V
V IN= 5V
70
0
10
20
30
40
Load Current (mA)
50
60
70
12V Dual Output Converter for computer for computer Interfacing
8
AIC1630
APPLICATION EXAMPLES
(CONTINUED)
L
SI9430DY
V IN
R3
100K
+
100µF C1
5.1V
ZD1
R4
270Ω
9014
Q1
+
50µH
MBR360
Q2
D1
C2
220µF
V OUT
(+5V)
91
89
87
VIN= 12V
10µF
C3
SD
VIN
MPSA13
85
VOUT
R1
45K
LBI
C4
680P
EXT
R5
LBO
GND
R2
6.4K
FB
36K
AIC1630A
Quicient Current = 300µA
100µF C1
81
VIN= 16V
VIN= 20V
79
77
75
0
1
1.5
2
2.2
2.5
3
3.5
4
L
270Ω
R4
Q3
1N4148
MBR360
Q1
5.1V 9014
ZD1
Q2
9014
R3
100K
VIN= 8V
83
5V Output Step-Down Converter -1
SI9430DY
+
L
O
A
D
Load Current (A)
Fig. 7
VIN
Efficiency (% )
+
50µH
D1
VOUT
(+5V)
+
220µF
C2
90
V IN= 8V
+
10µF
C3
SD
VOUT
VIN
680P
R5
C4
LBI
EXT
LBO
GND
FB
36K
AIC1630A
Quicient Current = 300µA
Fig. 8
R1
45K
L
O
A
D
Ef ficiency (% )
D2
MPSA13
V IN= 12V
85
R2
6.4K
V IN= 16V
V IN= 20V
80
0
1
2
3
Load Current (A)
4
5
5V Output Step-Down Converter -2
9
AIC1630
BATTERY PACK
IRFD020
Q1
VIN
LBI
EXT
LBO
GND
FB
D3
AIC1630A
+
R3
+
C2
RIF
3 3K
+
R9
0.8 2
MODE
LED
AIC1761/1766
1N4148
D3
GND
FB
AIC1630A
Q2
12K
2N3904
R2
750
R5
R6
330
2N2222
Q5
2N3904
Q4
RIT
75K
RIF
0.82
100K
R10
+
100µF
C4
120K
22K
R9
+VIN
(+VIN can be either higher or lower
than the battery voltage)
220
R12
R11
+
+
C3
4.7µF
120K
R15
0.1µF
C5
1.5K
R13
VBT
VREF
GND
VDD
TIMER VOUT
MODE
LED
1.5K
R14
Trickle
LBO
C2
VBAT
47K
R3
240K
R4
220µF
LBI
EXT
BATTERY PACK
Charging
100µF
VIN
Note:
VOUT
100K
TIP32C
Q3
VOUT
4.7V
ZD1
L1
50µH
IRFD020
Q1
C1
VDD
TIMER
1.5K
R13
Step-Up Rechargeable Battery Charger
IN5819 D2
+
GND
1.5K
R12
VIN ≥ 2.2V
Charging current =0.8A, Auto-Cut-Off at 0.75/0.25% -∆V point and Fault Conditions.
(RIF sets the Charging Current)
VIN must be lower than VBAT.
Short Circuit Condition is protected with a 2A Fuse.
Fig. 9
SD
+
22 K C3
R7
R6
150
R1
VREF
VBT
C3
1 0nF
Note:
0.1µF
C5
100µF
C4
R11
1 20K
1 2K
R2
R5
100µF C1
100k
33K
VBAT
VOUT
SD
ZD1
4.7V
R4
220µF
R1
240K
D2
1 50
+VIN
(VIN<VBAT)
220
R10
Trickle
1N5819
Charging
50µH
L1
2A FUSE
(CONTINUED)
4.7µF
APPLICATION EXAMPLES
1n4148
AIC1761/1766
Fast Charge Current
= 0.8A @VIN<VBAT
=(VIN - VBAT - 0.5)/0.82 @VIN>VBAT
Trickle charge Current = 30mA.
(RIF sets Fast Charge Current, RIT sets Trickle Charge Current)
Typical Efficiency = 75%.
With Short Circuit Protection.
Fig. 10
Step-Up/Down Rechargeable Battery Charger
10
AIC1630
PHYSICAL DIMENSIONS
8 LEAD PLASTIC SO (unit: mm)
D
H
E
e
MIN
MAX
A
1.35
1.75
A1
0.10
0.25
B
0.33
0.51
C
0.19
0.25
D
4.80
5.00
E
3.80
4.00
e
A
A1
C
B
SYMBOL
1.27(TYP)
H
5.80
6.20
L
0.40
1.27
SYMBOL
MIN
MAX
A1
0.381
—
A2
2.92
4.96
b
0.35
0.56
C
0.20
0.36
D
9.01
10.16
E
7.62
8.26
E1
6.09
7.12
L
8 LEAD PLASTIC DIP (unit: mm)
D
E1
E
A2
A1
C
L
eB
b
e
e
2.54 (TYP)
eB
—
10.92
L
2.92
3.81
11
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