AT1388/AT1388A
Preliminary Product Information
6-Channel DC-DC Controller for DSC
Features
• Low start-up power supply voltage :1.4V(CH6)
• Wide supply voltage range from 2.5V to 6.5V
(CH1~6)
• High speed operation is possible: Maximum
1 MHz
• Supports for up, flyback and up/down SEPIC
conversion
(AT1388:CH2,3,4,5,6 AT1388A:CH2,3,4,6)
• Supports for down and up/down Zeta conversion
(AT1388:CH1 AT1388A:CH1,CH5 )
• Synchronized rectification on CH1,CH2
• Supports for inverting converter CH5
• Built-in On/Off function
• Built-in Soft-Start Function
•
Built-in Short-Circuit Protection.
General Description
The AT1388/AT1388A is a 6-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/step-down SEPIC ,Zeta system with free input
and output settings). 6 channels can be built in the
LQFP48 package, each channel be controlled, and
soft-start.
The AT1388 include one comparator to generate
low-battery warning outputs. It also contains two
high efficiency topology by using synchronous
rectification PWM(It can be disable by floating
OUT1_2,OUT2_2.)
Applications
• Digital Cameras
• CCD Imaging Devices
• Camcorders
Pin Assignment
Ordering Information
Part Number
AT1388F
AT1388F_PBF
AT1388F_GRE
AT1388AF
AT1388AF_PBF
AT1388AF_GRE
Package
LQFP48
LQFP48, PB-Free
LQFP48,Green
LQFP48
LQFP48, PB-Free
LQFP48,Green
Marking
AT1388F
AT1388F,date code with one bottom line
AT1388F,date code with two bottom line
AT1388AF
AT1388AF,date code with one bottom line
AT1388AF,date code with two bottom line
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
AT1388/AT1388A
Preliminary Product Information
6-Channel DC-DC Controller 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
SS6
FB6
IN6
DTC5
SS5
FB5
IN5N
IN5P
DTC4
SS4
FB4
IN4
DTC3
SS3
FB3
IN3
CTL6
CTL5
VREG
AGND
VCC
CTL4
CT
CTL
CSCP
CTL3
CTL2
CTL1
IN2
FB2
SS2
DTC2
IN1
FB1
SS1
DTC1
LBI
LBO
OUT1_1
OUT1_2
OUT2_1
OUT2_2
PVCC
PGND
OUT3
OUT4
OUT5
OUT6
I/O
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
O
P
P
I
-
I
-
I
I
I
I
I
I
I
I
I
I
I
I
O
O
O
O
O
P
P
O
O
O
O
Function
CH6 Soft Start Setting Capacitor
CH6 Error Amplifier Output
CH6 Error Amplifier Inverted Input
CH5 Dead Time Control
CH5 Soft Start Setting Capacitor
CH5 Error Amplifier Output
CH5 Error Amplifier Negative Input
CH5 Error Amplifier Positive Input
CH4 Dead Time Control
CH4 Soft Start Setting Capacitor
CH4 Error Amplifier Output
CH4 Error Amplifier Inverted Input
CH3 Dead Time Control
CH3 Soft Start Setting Capacitor
CH3 Error Amplifier Output
CH3 Error Amplifier Inverted Input
CH6 ON/OFF Control Input
CH5 ON/OFF Control Input
2.3V Regulator Output
Power Ground
Power Supply
CH4 ON/OFF Control Input
Oscillation Frequency Setting Capacitor
Power Control Input
Timer Latch Short-Circuit Detection Capacitor Input
CH3 ON/OFF Control Input
CH2 ON/OFF Control Input
CH1 ON/OFF Control Input
CH2 Error Amplifier Inverted Input
CH2 Error Amplifier Output
CH2 Soft Start Setting Capacitor
CH2 Dead Time Control
CH1 Error Amplifier Inverted Input
CH1 Error Amplifier Output
CH1 Soft Start Setting Capacitor
CH1 Dead Time Control
Low Battery Detector Input
Low Battery Indicator
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
CH5 Output
*AT1388: Drive N-CH MOSFET
*AT1388A: Drive P-CH MOSFET
CH6 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
AT1388/AT1388A
Preliminary Product Information
6-Channel DC-DC Controller 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
AT1388/AT1388A
Preliminary Product Information
6-Channel DC-DC Controller for DSC
Absolute Maximum Ratings
Parameter
Power supply voltage
Output current
Output peak current
Power dissipation
Operation temperature
Storage temperature
these ratings.
Symbol
Vcc
Io
Io
P
D
Topr
Tstg
Condition
--
Output pin
Output pin, Duty≦5%
Ta
≦
25℃ (LQFP-48P)
--
--
Rating
Min
Max
--
--
--
--
-30
-55
6.5
30
200
860
85
125
Unit
V
mA
mA
mW
℃
℃
*
Semiconductor devices can be permanently damaged by application of stress in excess of absolute ratings. Do not exceed
Recommended Operating Conditions
Value
Parameter
Startup power supply voltage
Power supply voltage
Regulator voltage output current
Input voltage
Control input voltage
Output current
Oscillator
Timing capacitor
Soft start capacitor
Short detection capacitor
VREG pin capacitor
Symbol
Vcc
Vcc
I
OR
V
IN
V
CTL
Io
f
OSC
C
T
Cs
C
SS6
C
CSCP
C
VREG
CH6
CH6
Condition
Min
1.4
2.5
-10
0
0
--
1
100
47
--
--
--
--
--
0.082
CH1 to CH6
VREG pin
IN1 to IN6 pins
CTL pin
OUT pin (CH1 to CH5)
OUT pin (CH6)
--
--
CH1 to CH5
Unit
Typ
--
5.0
--
--
--
2
2
500
82
0.1
0.1
0.1
0.1
Max
6.0
6.0
0
Vcc-1.8
6.0
15
15
1000
560
1.0
1.0
1.0
--
V
V
mA
V
V
mA
mA
kHz
pF
μF
μF
μF
μF
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
AT1388/AT1388A
Preliminary Product Information
6-Channel DC-DC Controller for DSC
Electrical Characteristics
(TA=25℃, VCC=PVCC=5V)
Parameter
Reference voltage block [REF]
Regulator voltage
Output voltage temperature
stability
Input stability
Load stability
Symbol
V
REG
Condition
Measure result
Unit
Min. Typ. Max.
2.25
-
-80
-20
2.30
0.5
-
-
2.35
-
80
20
V
%
mV
mV
△V
REF
TA = -30℃ to 85℃
/V
REF
Line
Load
VCC=2.5V to 6V
VREG=0mA to –10mA
Under voltage lockout block [U.V.L.O]
Threshold voltage(CH1~CH5)
Hysteresis width(CH1~CH5)
CH6 Pre-OSC change to Main-
OSC threshold
Hysteresis width(CH6 Pre-OSC
change to Main-OSC threshold)
Pre-OSC frequency
Soft start block [CS]
Charge current
Valid Threshold voltage
Short circuit detection block [SCP]
Threshold voltage
Input source current
Threshold voltage
Input bias current
V
TH
I
CSCP
V
TH
I
B
CH1 to CH6
IN=0V
0.80
-1.5
0.65
-320
0.90
-1.0
0.7
-80
1.00
-0.6
0.75
-
V
μA
I
CS
-1.5
0.3
-1.0
-
-0.7
0.8
μA
V
V
TH
V
H1_5
V
TH6
V
H6
f
PRE-OSC
2.0
0.05
2.2
0.05
320
2.2
0.1
2.3
0.1
400
2.3
0.3
2.5
0.3
480
V
V
V
V
KHz
Short detect comparator [SCP Comp]
V
nA
Triangular wave oscillator block [OSC]
Oscillator frequency
Frequency stability for voltage
Frequency stability for
temperature
f
OSC
△f
/fdv
△f
/fdt
CT=82pF
VCC=2.5V to 6V
TA=-30℃ to 85℃
400
-
-
500
1
1
600
10
10
kHz
%
%
Error amplifier block [Error Amp](CH1~CH6)
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
Microcontroller MCU
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