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AIC1630
2-Cell, Step-Up DC/DC Converter Controller
FEATURES
Adjustable Output Voltage with Two Resistors (AIC1630A). Power-Saving Shutdown Mode (7A 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 300A 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. 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 25H to 50H inductance are recommended for most applications.
APPLICATIONS
Palmtop & Notebook Computers. Battery Charger Supply. Cellular Telephone. LCD Contrast Supply. Flash Memory Programmer. Battery Backup Supplies. Portable Instruments.
TYPICAL APPLICATION CIRCUIT
+VIN 100 100F R3 L D1 1N5819 2SC4672 50H C1 + SD VIN EXT 100F C3 LOAD Q1 1 SGND 270 R4 VOUT LBI LBO CGND
+VOUT 3.3V
5nF C2
AIC1630
Note : VIN 1.8V , VOUT 7V
High Efficiency Step-Up DC/DC Converter
Analog Integrations Corporation DS-1630-05
4F, 9, Industry E. 9th Rd, Science Based Industrial Park, Hsinchu Taiwan, ROC TEL: 886-3-5772500 FAX: 886-3-5772510
www.analog.com.tw
1
AIC1630
ORDERING INFORMATION
AIC1630 XXX PACKAGE TYPE N: PLASTIC DIP S: SMALL OUTLINE TEMPERATURE RANGE C=0C~+70C OUTPUT VOLTAGE DEFAULT: 3.3V 3: 3.0V 5: 5.0V A: Adjustable ORDER NUMBER 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 VIN 2 EXT 3 SGND 4
8 7 6 5
VOUT LBI LBO CGND
TOP VIEW SD 1 VIN 2 EXT 3 GND 4 8 7 6 5 VOUT LBI LBO FB
ABSOLUTE MAXIMUM RATINGS
Supply Voltage .......................................................................................... 7.0V DC Voltage Applied On All Other Pins ............................................................ 7.0V Operating Temperature Range ............................................................. -20C~80C Storage Temperature Range .......................................................... -65C ~150C
TEST CIRCUIT
Refer to Typical Application Circuit.
2
AIC1630
ELECTRICAL CHARACTERISTICS
specified.)
PARAMETER Input Voltage Default Output Voltage
(VIN=3.0V, Ta=25C, unless otherwise
MIN. 1.8 TYP. MAX. 7 UNIT V
TEST CONDITIONS
IL=200mA AIC1630 AIC1630-3 AIC1630-5
3.16 2.88 4.80
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
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 90 1.17 0.598
3.3 3.0 5.0 105 7 0.4 85 0.6 2.5 120 1.22 0.617 80 50 45
3.44 3.12 5.20 140 15
V
A A mS %
%VOUT %VOUT 150 1.27 0.636 KHz V V mA mA nA/Pin nA/Pin
LBO "ON Resistance" Input Pin Bias Current Output Pin Leakage
AIC1630A Pin 8=5V, Pin 3= 0.85V Sourcing Sinking VIN=2V
10 10
3
AIC1630
TYPICAL PERFORMANCE CHARACTERISTICS
Ext Pin Sourcing Capability
85 80 70
Ext Pin Sourcing Capability vs Temperature
90
VOUT=5V
80 70 60
50
VOUT=5V
EXT (mA)
60
EXT(mA)
Ta=25C
50
Ext Pin Voltage=0.85V
40
VOUT=3V
30
40
VOUT=3V
30
0.6 0.8 1
20
EXT Pin Voltage (V)
1.2
1.4
1.6
1.8
0
10
20
30
40
50
60
70
80
Temperature (C)
Ext Pin Sinking Capability
85 80 75 70
55
Ext Pin Sinking Capability vs Temperature
53 51 49
Ta=25C
VOUT=5V Ext Pin Voltage=0.85V
EXT (mA)
65 60 55 50 45 40 35 0.6 0.8 1 1.2 1.4 1.6 1.8 2.0
EXT(mA)
47 45 43 41 39 37 35 0 10 20 30 40 50 60 70 80
VOUT=5V VOUT=3V
VOUT=3V
EXT Pin Voltage (V)
Temperature (C)
Switch off Supply Current vs Input Voltage
110 105 100
120 115 110
Switch Off Supply Current vs Temperature
VIN=3V
IS (A)
90 85 80 75 1.5 2 2.5 3 3.5 4 4.5 5
S (A)
95
Ta=25C
105 100 95 90
VIN (V)
0
10
20
30
40
50
60
70
80
Temperature (C)
4
AIC1630
TYPICAL PERFORMANCE CHARACTERISTICS (CONTINUED)
Shutdown Mode Supply Current vs Input Voltage
8.2 8 9.4 9
Shutdown Mode Supply Current vs Temperature VIN=3V
Ta=25C
7.8 8.6
Is (A)
7.6 7.4 7.2 7
IS (A)
8.2 7.8 7.4 7
1
1.5
2
2.5
VIN (V)
3
3.5
4
4.5
5
0
10
20
30
40
50
60
70
80
Temperature (C)
Oscillator Frequency vs Input Voltage
130
120
123
Oscillator Frequency vs Temperature
(KHz)
122
110 100
Frequency (KHz)
VIN=3V
121
Ta=25C
Frequency
90 80 70 60
120
119
118
1
1.5
2
2.5
VIN (V)
3
3.5
4
4.5
5
117
0
10
20
30
40
50
60
70
80
Temperature (C)
BLOCK DIAGRAM
SD 100mV VIN FB EXT=LOW EXT OSC + 0.617V FB EXT=HIGH 1.22V + LBO Shutdown + LBI VOUT
GND
+ 100mV
FB
5
AIC1630
PIN DESCRIPTION
AIC1630/ AIC1630-3 / AIC1630-5
PIN 1: SD The AIC1630 goes in shutdown mode and consumes less than 10A 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. Input supply. Push-pull drive output to drive external power switch. Ground connected to source of power switch. Ground for control circuits of the IC. It should be separated from SGND to avoid the interference. Open drain output of the battery low detector, with 45 "ON resistance" at VIN=2V. It is pulled low when the voltage on LBI pin is below 1.22V. 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 A 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. - Input supply.
PIN 2: VIN PIN 3: EXT
-
PIN 2: VIN
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:
PIN 4:SGND PIN 5:CGND -
PIN 6:LBO
-
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 45 "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 7:LBI
-
PIN 8:VOUT -
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)
VIN
100 R3 100F
95 90
+
C1 50H L 1N5819
SD VIN EXT SGND
VOUT LBI LBO CGND
65 60
Eff iciency (% )
85 80
V IN= 4.5V V IN= 3V V IN= 3.3V
V IN= 2.2V
75 70
5nF C2 D1 100F LOAD 2SC4672 Q1
V IN= 2V
+
C3
270 R4
AIC1630-5
0
100
200
300
400
500
600
700
800
Load Current (mA)
Fig. 1
5V Output Step-Up Converter
VOUT
(+12V)
100
85
VIN
R3 C1
VIN=5V
+
SD 220F VIN
VOUT
VIN=4.5V
Efficiency (%)
180K LBI LBO FB
R1
80
L 1N5819 D1
VIN=3.3V VIN=2.75V
47H D2 1N4148
EXT 1K R4 GND
75
2SC4672 Q1
LOAD
100F OS-CON
+
C3
10K
R2
70 0 30 60 90
VIN=2.25V
120 150 180 210 240 270
AIC1630A
Load Current (mA)
Note :
VIN
2.2V
Fig. 2
12V Output Step-Up Converter for Flash Memory
VOUT
(+36V) VIN
VS(+3/5V)
95
V IN= 20V
+ C1 L 220H 47F
SD VIN EXT
VOUT LBI LBO FB
1M
R1
90
V IN= 16V
Ef ficiency (% )
85
V IN= 12V V IN= 8V V IN= 6V
1N5819 D1 LOAD 2SC4672 Q1 + C3 33F 120 R3
80
GND
75
AIC1630A
17.8K
R2
70 0 10
V IN= 5V
20 30 40 50
Vs= 5V
60 70
Load Current (mA)
Fig. 3
36V Output Step-Up Converter for Color LCD
7
AIC1630
APPLICATION EXAMPLES
VIN D1 1N5819 VOUT (-24V) C3 L 150H 10F + 0.1F C2 47F 2SC4672 Q1 VS (+3/5V) C6 5nF
(CONTINUED)
88 86 84
V IN= 15V V IN= 10V V IN= 20V V IN= 5V
+
Eff iciency (% )
C1
SD VIN EXT
VOUT LBI LBO FB
90K
R1
82 80 78 76 74 72 70 0 5 10 15 20 25 30
1.2K R3 C5 5nF
GND
C4
+ 47F
1N5819
LOAD
1N5819 D2
D3
AIC1630A
2.4K
R2
Vs= 5V
35 40 45
Load Current (mA)
Fig. 4
-24V Output Inverting Converter for LCD
VIN
D1 1N5819 VOUT (-24V) C5 150H L
VS (+3/5V) + 220F C3 10F 2SC4672 Q1
78 76
Vs= 3V
V IN= 5V V IN= 4V V IN= 3V
+
C1 150
SD VIN EXT R3 D4 GND
VOUT LBI LBO FB
74
5nF D2
+
10F C2
120 R4
1N5819
LOAD
1N5819 D3 C4 + 33F
AIC1630A
2.4K
R2
Ef ficiency (% )
90K
R1
72 70 68 66 64 62 60 58
V IN= 2V
1N4148
56
0
5
10
15
20
25
Load Current (mA)
Fig. 5
2V Input 20mA Load -24V Output Inverting Converter for LCD
VOUT (+12V)
VIN
C3 L D1 1N5819 50H
+
220F
VS (+3/5V) + 10F C1 SD VOUT LBI LBO FB 10K R2 180K R1
90 95
V IN= 20V
47F C2 D2
2SC4672 Q1
VOUT (-12V)
+
10F C5
+
VIN 120 R4 430 EXT R3 GND
Eff iciency (% )
V IN= 16V V IN= 12V V IN= 8V V IN= 6V
85
80
1N5819
C4 47F +
1N5819 D3 D4 1N4148
AIC1630A
75
V IN= 5V
70 0 10 20 30 40 50
Vs= 5V
60 70
Load Current (mA)
Fig. 6
12V Dual Output Converter for computer for computer Interfacing
8
AIC1630
APPLICATION EXAMPLES
SI9430DY MBR360 Q2 V IN + 100F C1 5.1V ZD1 R3 100K 9014 Q1 R4 270
(CONTINUED)
L 50H + C2 220F V OUT (+5V)
91 89 87
D1
+ SD VIN MPSA13 680P R5 36K Quicient Current = 300A C4 EXT GND LBO FB R2 6.4K VOUT LBI
VIN= 12V VIN= 8V
R1 45K
L O A D
Efficiency (% )
10F C3
85 83 81 79 77 75 0
VIN= 16V VIN= 20V
AIC1630A
1
1.5
2
2.2
2.5
3
3.5
4
Load Current (A)
Fig. 7
5V Output Step-Down Converter -1
SI9430DY MBR360 VIN
L 50H D1 220F
+
R3 100K Q1 5.1V 9014 ZD1
100F C1
Q3
9014
270 R4 1N4148 D2
Q2
+
C2
VOUT (+5V)
90
V IN= 8V
10F C4
C3
SD VIN
VOUT LBI LBO FB R2 6.4K R1 45K L O A D
Ef ficiency (% )
+
V IN= 12V
85
MPSA13
680P R5 36K Quicient Current = 300A
EXT GND
V IN= 16V
V IN= 20V
80 0
AIC1630A
1
Load Current (A)
2
3
4
5
Fig. 8
5V Output Step-Down Converter -2
9
AIC1630
APPLICATION EXAMPLES
2A FUSE 50H L1 1N5819 D2 240K 100k VBAT R4 33K 220F 1 50 R1
SD VOUT LBI LBO FB VIN EXT GND
(CONTINUED)
+VIN (VINBATTERY PACK R3 + C2
220 R10 R9 + 100F C4
IRFD020 Q1
1n4148
D3
4.7F
+ ZD1 4.7V 100F C1
AIC1630A
1 2K R2 R5 3 3K C3 1 0nF RIF
R11 1 20K 0.8 2 22 K C3 R7
+
GND TIMER MODE
VDD VOUT LED
AIC1761/1766
100K R6 1N4148 D3
Note:
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
Step-Up Rechargeable Battery Charger
IN5819 D2 240K R4 C2 R5
TIP32C Q3 47K R3 Q2 12K + RIT 75K
BATTERY PACK
220 R12 100F C4 120K + C3 4.7F 120K R15 +
+VIN (+VIN can be either higher or lower than the battery voltage) 0.1F C5
VBT GND MODE VREF VDD LED
50H
VBAT
SD VIN EXT
VOUT LBI LBO FB
220F
150 R1
100K R10
R6 330
1.5K R13
Charging
1.5K R14
L1
IRFD020 Q1
100F
C1
AIC1630A
2N3904 Q4
TIMER VOUT
4.7V ZD1
AIC1761/1766
Note:
= 0.8A @VINVBAT Trickle charge Current = 30mA. (RIF sets Fast Charge Current, RIT sets Trickle Charge Current) Typical Efficiency = 75%. With Short Circuit Protection.
Fast Charge Current
Fig. 10
Step-Up/Down Rechargeable Battery Charger
10
Trickle
+
GND
2N3904 R2 750
2N2222 Q5
RIF 0.82
22K R9
R11
Trickle
VBT
VREF
Charging
0.1F C5
1.5K R12
1.5K R13
AIC1630
PHYSICAL DIMENSIONS
8 LEAD PLASTIC SO (unit: mm)
D
SYMBOL A
H E
MIN 1.35 0.10 0.33 0.19 4.80 3.80 5.80 0.40
MAX 1.75 0.25 0.51 0.25 5.00 4.00 6.20 1.27
A1 B C D E
e A C
A1
e H L
L
1.27(TYP)
B
8 LEAD PLASTIC DIP (unit: mm)
D
SYMBOL A1
E1
MIN 0.381 2.92 0.35 0.20 9.01 7.62 6.09 -- 2.92
MAX -- 4.96 0.56 0.36 10.16 8.26 7.12 10.92 3.81
A2 b C
E
D E
C
A2 A1
L
E1 e eB L
2.54 (TYP)
eB b e
11

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