ETC AT1382B

AT1382B
Preliminary Product Information
4-Channel DC-DC Converter for DSC
Features
General Description
• Low start-up power supply voltage :1.4V(CH4)
• Wide supply voltage range from 1.8V to 7V
(CH1~4)
• High speed operation is possible: Maximum
1 MHz
• Supports for down and up/down Zeta
conversion (CH1)
• Supports for up, flyback and up/down SEPIC
conversion (CH2,3,4)
• Totem-pole type output for MOSFET
• Built-in On/Off function
• Built-in Short-Circuit Protection
The AT1382B is a 4-channel PWM DC/DC control
IC for low voltage applications with a soft start
function and short circuit detection function. This
IC is ideal for up conversion, down conversion,
and up/down conversion (using a step-up/stepdown Zeta(CH1) and SEPIC(CH2,3,4) system with
free input and output settings). Four channels can
be built in the LQFP48 package, each channel be
controlled, and soft-start.
Applications
The AT1382B include one comparator to generate
low-battery warning outputs. It also contains a gain
block that can be used with an external P-channel
MOSFET to make a low-dropout linear regulator.
• Digital Cameras
• CCD Imaging Devices
• Camcorders
Pin Assignment
Ordering Information
Part number
AT1382B
Package
LQFP48
Marking
AT1382BF
Aimtron reserves the right without notice to change this circuitry and specifications.
2F, No.10, Prosperity RD. II, Science-Based Industrial Park, Hsinchu 300,Taiwan, R.O.C.
Tel: 886-3-563-0878
WWW: http://www.aimtron.com.tw
Fax: 886-3-563-0879
Email: service@aimtron.com.tw
1
AT1382B
Preliminary Product Information
4-Channel DC-DC Converter for DSC
Pin Description
Pin No. Pin name
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
DTC4
FB4
IN4
CS4
CTL4
DTC3
FB3
IN3
CS3
CTL3
CSCP
VREF
GND
GND
VBG
VCC
VCC
POR
RT
CT
VB
CTL
ENLD
CT2
CTL2
CS2
IN2
FB2
DTC2
CTL1
CS1
IN1
FB1
DTC1
LBI
LBO
AI
AO
OUT1_1
OUT1_2
OUT2_1
OUT2_2
N.C.
PVCC
N.C.
PGND
OUT3
OUT4
I/O
I
O
I
I
I
O
I
I
O
P
P
TEST
P
P
TEST
O
I
I
TEST
I
I
O
I
I
I
O
I
I
O
I
O
O
O
O
O
P
P
O
O
Function
CH4 Dead Time Control
CH4 Error Amplifier Output
CH4 Error Amplifier Inverted Input
CH4 Soft Start Setting Capacitor
CH4 ON/OFF Control
CH3 Dead Time Control
CH3 Error Amplifier Output
CH3 Error Amplifier Inverted Input
CH3 Soft Start Setting Capacitor
CH3 ON/OFF Control
Timer Latch Short-Circuit Detection Capacitor Input
Reference 0.9V Output
Ground
Ground
Reference Test Pin
Power Supply
Power Supply
Pre-OSC Change to Main-OSC Indicator
Oscillation Frequency Setting Resistor
Oscillation Frequency Setting Capacitor
Reference 1.8V Output
Power Supply Control
Gain Block Enable Input
Triangular wave OSC Inverted output Test Pin
CH2 ON/OFF Control
CH2 Soft Start Setting Capacitor
CH2 Error Amplifier Inverted Input
CH2 Error Amplifier Output
CH2 Dead Time Control
CH1 ON/OFF Control
CH1 Soft Start Setting Capacitor
CH1 Error Amplifier Inverted Input
CH1 Error Amplifier Output
CH1 Dead Time Control
Low Battery Detected Input
Low Battery Indicator
LDO Regulated Input
LDO Drive Output
CH1 Main Side Output
CH1 Synchronous Rectifier Side Output
CH2 Main Side Output
CH2 Synchronous Rectifier Side Output
Drive Output Block Power Supply
Drive Output Block Ground
CH3 Output
CH4 Output
2F, No.10, Prosperity RD. II, Science-Based Industrial Park, Hsinchu 300,Taiwan, R.O.C.
Tel: 886-3-563-0878
WWW: http://www.aimtron.com.tw
Fax: 886-3-563-0879
Email: service@aimtron.com.tw
2
AT1382B
Preliminary Product Information
4-Channel DC-DC Converter for DSC
Block Diagram
2F, No.10, Prosperity RD. II, Science-Based Industrial Park, Hsinchu 300,Taiwan, R.O.C.
Tel: 886-3-563-0878
WWW: http://www.aimtron.com.tw
Fax: 886-3-563-0879
Email: service@aimtron.com.tw
3
AT1382B
Preliminary Product Information
4-Channel DC-DC Converter for DSC
Absolute Maximum Ratings
Parameter
Symbol
Condition
Vcc
--
Power supply voltage
Rating
Min
Max
Unit
--
8
V
Output current
Io
Output pin
--
20
mA
Output peak current
Io
Output pin, Duty≦5%
--
200
mA
Power dissipation
PD
Ta≦25℃ (LQFP-48P)
--
860
mW
Operation temperature
Topr
--
-30
85
℃
Storage temperature
Tstg
--
-55
125
℃
*Semiconductor devices can be permanently damaged by application of stress in excess of absolute ratings. Do not
exceed these ratings.
Recommended Operating Conditions
Value
Parameter
Symbol
Condition
Unit
Min
Typ
Max
Startup power supply voltage
Vcc
CH4
1.4
--
7
V
Power supply voltage
Vcc
CH4
CH1 to CH3
1.5
1.8
5.0
5.0
7
7
V
V
Reference voltage output current
IOR
VREF pin
-1
--
0
mA
VB pin output current
IB
VB pin
-0.5
--
0
mA
Input voltage
VIN
IN1 to IN4 pins
0
--
Vcc-1.8
V
Control input voltage
VCTL
CTL pin
0
--
7
V
OUT pin (CH1 to CH3)
--
2
15
mA
OUT pin (CH4)
1
2
15
mA
Output current
Io
Oscillator
fOSC
--
100
500
1000
kHz
Timing capacitor
CT
--
47
100
560
pF
Timing resistor
RT
--
8.2
18
100
kΩ
Cs
CH1 to CH3
--
0.027
1.0
μF
CH4
--
0.47
1.0
μF
Soft start capacitor
CCS4
Short detection capacitor
CSCP
--
--
0.1
1.0
μF
VB pin capacitor
CVB
--
0.082
0.1
--
μF
Operating ambient temperature
Ta
--
-30
25
85
℃
2F, No.10, Prosperity RD. II, Science-Based Industrial Park, Hsinchu 300,Taiwan, R.O.C.
Tel: 886-3-563-0878
WWW: http://www.aimtron.com.tw
Fax: 886-3-563-0879
Email: service@aimtron.com.tw
4
AT1382B
Preliminary Product Information
4-Channel DC-DC Converter for DSC
Electrical Characteristics
(Ta=25℃, VCC=PVCC=5V)
Parameter
Symbol
Condition
Measure result
Unit
Min. Typ. Max.
Reference voltage block [REF]
Reference voltage
Output voltage temperature
stability
VREF
△VREF
Ta = -30℃ to 85℃
/VREF
0.88
0.90
0.92
V
-
0.5
-
%
Input stability
Line
VCC=1.8V to 7V
-10
-
10
mV
Load stability
Load
VREF=0mA to –1mA
-10
-
10
mV
Shout circuit output current
IOSC
VREF=0.7V
-20
-5
-1
mA
Under voltage lockout block [U.V.L.O]
Threshold voltage(CH1~CH3)
VTH
1.5
1.6
1.7
V
Hysteresis width(CH1~CH3)
VH
-
0.2
-
V
Reset voltage(CH1~CH3)
VRST
1.6
1.7
1.8
V
CH4 Pre-OSC change to MainOSC threshold
VTH2
-
1.7
-
V
VSTB
-
50
100
mV
ICS
-6.0
-5.0
-4.0
μA
Threshold voltage
VTH
0.65
0.70
0.75
V
Input standby voltage
VSTB
-
50
100
mV
Input latch voltage
VI
-
50
100
mV
Input source current
ICSCP
-1.4
-1.0
-0.6
μA
450
500
550
kHz
Soft start block [CS]
Input standby voltage
Charge current
Short circuit detection block [SCP]
Triangular wave oscillator block [OSC]
Oscillator frequency
fOSC
CT=100pF, RT=20kΩ
Frequency stability for voltage
△f
/fdv
VCC=1.8V to 7V
-
1
10
%
Frequency stability for
temperature
△f
/fdt
Ta=-30℃ to 85℃
-
1
-
%
2F, No.10, Prosperity RD. II, Science-Based Industrial Park, Hsinchu 300,Taiwan, R.O.C.
Tel: 886-3-563-0878
WWW: http://www.aimtron.com.tw
Fax: 886-3-563-0879
Email: service@aimtron.com.tw
5
AT1382B
Preliminary Product Information
4-Channel DC-DC Converter for DSC
Parameter
Symbol
Condition
Measure result
Unit
Min. Typ. Max.
Error amplifier block [Error Amp](CH1~CH4)
Threshold voltage
VT temperature stability
VTH
FB=0.9V
0.69
0.70
0.71
V
△VT/VT Ta = -30℃ to 85℃
-
0.5
-
%
-320
-80
-
nA
Input bias current
IB
IN=0V
Voltage gain
AV
DC
-
100
-
dB
Frequency bandwidth
BW
AV=0dB
-
10
-
MHz
VOH
1.3
1.4
-
V
VOL
-
50
200
mV
-
-4.0
-1.0
mA
70
140
-
μA
CH1 to CH4
0.65
0.7
0.75
V
IN=0V
-320
-80
-
nA
Duty = 0 %
0.25
0.3
-
V
-
0.75
0.80
V
0.20
0.25
-
-
0.65
0.70
-1.0
-0.3
-
μA
-
-130
-80
mA
65
100
-
mA
Output voltage
Output source current
Output sink current
ISOURCE FB=0.5V
ISINK
FB=0.5V
Short detect comparator [SCP Comp]
Threshold voltage
VTH
Input bias current
IB
PWM Comp. [PWM Comp]
Threshold voltage(CH4)
Threshold voltage(CH1~3)
Input current
VT0
VTmax
VT0
Duty = 100 %
Duty = 0 %
VTmax
Duty = 100 %
IDTC
DTC=0.4V
Output block (CH1,2) [Pin 40,42]
Output source current
Output sink current
Output ON resistor
ISOURCE Duty≧95%, OUT=0V
ISINK
Duty≦5%, OUT=5V
ROH
OUT = -15mA
-
18
30
Ω
ROL
OUT = 15mA
-
16
25
Ω
ISOURCE Duty≧95%, OUT=0V
-
-130
-80
mA
65
100
-
mA
Output block (CH1 to CH3) [Pin 39,41,47]
Output source current
Output sink current
Output ON resistor
ISINK
Duty≦5%, OUT=5V
ROH
OUT = -15mA
-
18
30
Ω
ROL
OUT = 15mA
-
16
25
Ω
2F, No.10, Prosperity RD. II, Science-Based Industrial Park, Hsinchu 300,Taiwan, R.O.C.
Tel: 886-3-563-0878
WWW: http://www.aimtron.com.tw
Fax: 886-3-563-0879
Email: service@aimtron.com.tw
6
AT1382B
Preliminary Product Information
4-Channel DC-DC Converter for DSC
Parameter
Symbol
Condition
Measure result
Unit
Min. Typ Max.
Output block (CH4) [Pin 48]
Output source current
ISOURCE Duty≧95%, OUT=0V
Output sink current
Output ON resistor
-
-260
-160
mA
150
260
-
mA
ISINK
Duty≦5%, OUT=5V
ROH
OUT = -15mA
-
9
15
Ω
ROL
OUT = 15mA
-
9
15
Ω
VIH
Active mode
1.3
-
7
V
VIL
Standby mode
0
-
0.8
V
VIH
Active mode
1.3
-
7
V
VIL
Standby mode
0
-
0.8
V
ICTL
CTL = 5V
-
5
20
μA
1.20
1.22
1.24
V
-0.1
-
1.3
V
-
-
100
nA
70
100
140
V/V
Control block [CTL]
CTL input voltage
CTL1 to CTL4 input voltage
Input current
Analog gain block [AO,AI]
AI feedback regulation voltage
VAO=VOUT-1.22V
AI input common-mode range
AI input current
VAI=1.32V
AI to AO voltage gain
AO output sink current
VAI=1V, VAO=2V
0.5
2.5
-
mA
AO output source current
VAI=1.5V, VAO=2V
0.5
2.5
-
mA
1.2
-
7
V
0
-
0.8
V
LBI detect threshold
1.20
1.22
1.24
V
Detect Hysteresis
-50
+50
mV
ENLD enable
VIH
Active mode
ENLD disable
VIL
Standby mode
Low battery detect block [LBI, LBO]
LBO output voltage low
Isink=1mA
-
-
0.4
V
LBO output high leakage
VLBO=5V
-
0.01
1
μA
-
-
10
μA
-
-
10
μA
-
3
6
mA
General
Icss
Standby current
Power supply current
CTL=0V
CTL=0V
Icss(o) CTL1=CTL2=CTL3=
CTL4="H"
CTL=CTL1=CTL2=C
Icc
TL3=CTL4=ENLD="
H"
2F, No.10, Prosperity RD. II, Science-Based Industrial Park, Hsinchu 300,Taiwan, R.O.C.
Tel: 886-3-563-0878
WWW: http://www.aimtron.com.tw
Fax: 886-3-563-0879
Email: service@aimtron.com.tw
7
AT1382B
Preliminary Product Information
4-Channel DC-DC Converter for DSC
Typical Application
For 4 pcs AA Battery
2F, No.10, Prosperity RD. II, Science-Based Industrial Park, Hsinchu 300,Taiwan, R.O.C.
Tel: 886-3-563-0878
WWW: http://www.aimtron.com.tw
Fax: 886-3-563-0879
Email: service@aimtron.com.tw
8
AT1382B
Preliminary Product Information
4-Channel DC-DC Converter for DSC
2F, No.10, Prosperity RD. II, Science-Based Industrial Park, Hsinchu 300,Taiwan, R.O.C.
Tel: 886-3-563-0878
WWW: http://www.aimtron.com.tw
Fax: 886-3-563-0879
Email: service@aimtron.com.tw
9
AT1382B
Preliminary Product Information
4-Channel DC-DC Converter for DSC
Typical Characteristics
2F, No.10, Prosperity RD. II, Science-Based Industrial Park, Hsinchu 300,Taiwan, R.O.C.
Tel: 886-3-563-0878
WWW: http://www.aimtron.com.tw
Fax: 886-3-563-0879
Email: service@aimtron.com.tw
10
AT1382B
Preliminary Product Information
4-Channel DC-DC Converter for DSC
2F, No.10, Prosperity RD. II, Science-Based Industrial Park, Hsinchu 300,Taiwan, R.O.C.
Tel: 886-3-563-0878
WWW: http://www.aimtron.com.tw
Fax: 886-3-563-0879
Email: service@aimtron.com.tw
11
AT1382B
Preliminary Product Information
4-Channel DC-DC Converter for DSC
Package Outline
LQFP48
2F, No.10, Prosperity RD. II, Science-Based Industrial Park, Hsinchu 300,Taiwan, R.O.C.
Tel: 886-3-563-0878
WWW: http://www.aimtron.com.tw
Fax: 886-3-563-0879
Email: service@aimtron.com.tw
12
AT1382B
Preliminary Product Information
4-Channel DC-DC Converter for DSC
Reflow Condition (IR/Convection or VPR Reflow)
Reference JEDEC Standard J-STD-020A
Classification Reflow Profiles
Convection or
IR/Convction
Average Heating Rate(180°C to peak)
5°C/second max.
120 seconds max.
Preheat Temperature(125±20°C)
10~150 seconds
Temperature maintained above 180°C
10~20
seconds
Time within 5°C of actual Peak
Temperature
Peak Temperature Range(Note 1)
219~225°C or
235~240°C
Cooling Rate
6°C /second max.
6 minutes max.
Time 25°C to Peak Temperature
VPR
10°C/second max.
60 seconds
219~225°C or
235~240°C
10°C/second max.
*1 The maximum peak temperatures for IR and VP reflow are depending on package dimensions.
Package Reflow Conditions
Pkg. Thickness ≥2.5mm Pkg. Thickness <2.5mm Pkg. Thickness <2.5mm
and
and
and all bags
3
Pkg. Volume ≥350 mm
Pkg. Volume <350 mm3
Convection 219~225°C
VPR 219~225°C
IR/Convection 219~225°C
Convection 235~240°C
VPR 235~240°C
IR/Convection 235~240°C
2F, No.10, Prosperity RD. II, Science-Based Industrial Park, Hsinchu 300,Taiwan, R.O.C.
Tel: 886-3-563-0878
WWW: http://www.aimtron.com.tw
Fax: 886-3-563-0879
Email: service@aimtron.com.tw
13