AT1369 [AIMTRON]
2-Channel Synchronous Buck PWM Controller with Power Good Reset; 双通道同步降压PWM控制器与电源良好复位
| 型号： | AT1369 |
| 厂家： | 
AIMTRON TECHNOLOGY |
| 描述： | 2-Channel Synchronous Buck PWM Controller with Power Good Reset |
| 文件： | 总12页 (文件大小：750K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
AT1369
Preliminary Product Information
2-Channel Synchronous Buck PWM Controller
with Power Good Reset
Features
General Description
• High efficiency (min. 90% On I =300mA
O
~600mA)
The AT1369 provides complete control and
protection for a DC/DC converter optimized for
high-performance microprocessor applications. It
is designed to drive one P-Channel and one N-
Channel MOSFETs in a synchronous-rectified
buck topology. The AT1369 integrates all of the
control, output adjustment, monitoring and
protection functions into a single package. The
output voltage of the converter can be precisely
regulated with a maximum tolerance of ±2% over
temperature and line voltage variations. The
AT1369 is a family of low-noise synchronous step-
down DC/DC converters that is ideally suited for
systems powered from a 1-cell Li-ion battery or
from a 3-cell to 4-cell NiCd, NiMH, or alkaline
battery. It can also be used to USB-Based power
system.
• Using external P and N channel MOSFET
• Maximum Duty 100%
• Oscillation frequency 300KHz or 600KHz
• Soft Start by an external capacity
• Output voltage accuracy ±2%
• Built-in ON/OFF Function
• Built-in Short-circuit Protection
• Stand-by current max. 10µA
• Quiescent Current 1.5mA
• Built-in Power Good reset circuit
• Input voltage: 2.5V ~7.0V
Applications
• Slim-Type CD-ROM/DVD-ROM/CD-RW
• Power Supply for portable devices
Block Diagram
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
Fax: 886-3-563-0879
WWW: http://www.aimtron.com.tw
Email: service@aimtron.com.tw
1
AT1369
Preliminary Product Information
2-Channel Synchronous Buck PWM Controller
with Power Good Reset
Pin Configuration
Ordering Information
Part number
AT1369AR
Package
Marking
AT1369AR
SSOP20
SSOP20,Green
SSOP20
AT1369AR_GRE
AT1369BR
AT1369AR, Date Code with one bottom line
AT1369BR
AT1369BR_GRE
SSOP20,Green
AT1369BR, Date Code with one bottom line
A: fosc =300KHz B: fosc =600KHz
Pin Description
Symbol Pin No.
Descript
Symbol
SS2
Pin
Descript
No.(A/B)
FB1
1
Inverting input to error
amplifier 1
11
Sotf-start 2
COMP1
PVCC
2
3
Error amplifier1 output
Power blocks power
supply
SCP
CTL
12
13
Short-Circuit protection
Chip enable, high active
PDRV1
4
Output1 for Pch-MOSFET VCC
14
Control blocks power
supply
NDRV1
NDRV2
PDRV2
5
6
7
Output1 for Nch-MOSFET GND
Output2 for Nch-MOSFET RESET
15
16
17
Control blocks ground
Power Good indicator
VCC monitor voltage
adjustable input pin
Adjustable Reset input
Output voltage 3.3V
Output2 for Pch-MOSFET
IN1
PGND
8
9
Power blocks ground
Error amplifier1 output
EI
18
19
COMP2
3V3
FB2
10
Inverting input to error
amplifier 2
SS1
20
Sotf-start 1
2F, No.10, Prosperity RD. II, Science-Based Industrial Park, Hsinchu 300,Taiwan, R.O.C.
Tel: 886-3-563-0878
Fax: 886-3-563-0879
WWW: http://www.aimtron.com.tw
Email: service@aimtron.com.tw
2
AT1369
Preliminary Product Information
2-Channel Synchronous Buck PWM Controller
with Power Good Reset
Absolute Maximum Ratings
Parameter
Condition
Rated Value
Unit
Min.
Max.
Power Supply Voltage
—
—
-
+8
V
Source Average Current of PDRV1,NDRV1
PDRV2,NDRV2
-
-50
mA
Sink Average Current of PDRV1,NDRV1,
PDRV2,NDRV2
—
—
—
—
-
-
-
50
mA
mA
mA
Source Peak Current of PDRV1,NDRV1,
PDRV2,NDRV2
-200
200
Sink Peak Current of PDRV1,NDRV1,
PDRV2,NDRV2
Input Voltage to Error Amplifier
-
-
-30
-55
6.5
560
+85
+125
V
Continuous power dissipation
mW
SSOP20（T =+25℃）
a
Operating temperature
Storage temperature
—
0C
—
0C
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are
stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the
operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended
periods may affect device reliability.
Recommended Operating Conditions
(Ta=+250C)
Parameter
Symbol
Values
Typ.
Unit
Min.
Max.
Power supply voltage
Control input voltage
Operating temperature
VCC
2.5
--
7
Ｖ
V
°C
VCTL
0
--
7
TOP
-20
+25
+85
2F, No.10, Prosperity RD. II, Science-Based Industrial Park, Hsinchu 300,Taiwan, R.O.C.
Tel: 886-3-563-0878
Fax: 886-3-563-0879
WWW: http://www.aimtron.com.tw
Email: service@aimtron.com.tw
3
AT1369
Preliminary Product Information
2-Channel Synchronous Buck PWM Controller
with Power Good Reset
Electrical Characteristics
(VCC = 5V,T =+25℃ , unless otherwise noted. )
a
Parameter
Symbol
Condition
Values
Unit
Min. Typ. Max.
Input Supply Range
VCC
ICC
2.5
--
7.0
V
Duty=50%,
=600KHz
PDRV/NDRV No Load
CTL=0V
f
Quiescent Current
1.5 2.0 mA
OSC
Current in standby mode
Reference Voltage
IST
10
1.20 1.22 1.24
µA
Entire device
T =-20℃ to +85℃
a
VREF
V
VCC=2.5V to 7.0V
Reference Voltage
line-regulation
VREF-Line
1
10 mV
T =-20℃ to +85℃
a
Rference Variation
with Temperature
0.5 1.5
%
Input Offset Voltage
Source Current
Sink Current
VIO
IOH
IOL
10 mV
VCOMP = VREF -0.5V
VCOMP = 0.5V
T =-20℃ to +85℃
a
-1.0 -1.5 -2.0 mA
μA
160 120 80
Source current Variation
20
%
with temperature
Error amplifier
Sink current Variation
with temperature
T =-20℃ to +85℃
a
20
%
MHz
V
Unity Gain Bandwidth
Common Mode Input
Voltage Range
fT
10.0
VCOM
0.2
1.5
DC Open Loop Gain
AV
fosc
110
dB
KHz
AT1369A
AT1369B
250 300 350
Frequency
500 600 700
fosc
KHz
V
1.0
0.5
2
High Level Voltage
Low Level Voltage
Sawtooth wave
oscillator (OSC)
V
Variation with Power
Vcc=2.5V to 7V
%
%
Supply
Variation with
temperature
T =-20℃ to +85℃
a
7
-1.5 -1.0 -0.8
1.0
Charge Current of
ICSS1,2
µA
V
SS1,2
Soft-Start
Invalid threshold
voltage of SS1,2
Charge Current of
ICSCP
-1.7 -1.25 -1.0
0.9
µA
SCP
Short-Circuit
Threshold Voltage of
SCP
V
2F, No.10, Prosperity RD. II, Science-Based Industrial Park, Hsinchu 300,Taiwan, R.O.C.
Tel: 886-3-563-0878
Fax: 886-3-563-0879
WWW: http://www.aimtron.com.tw
Email: service@aimtron.com.tw
4
AT1369
Preliminary Product Information
2-Channel Synchronous Buck PWM Controller
with Power Good Reset
Duty≥95% PDRV=0V
Duty≤5% PDRV=5V
PDRV=-15mA
Output source current
Output sink current
Isource
Isink
-
-130 -80 mA
PDRV1,2 Output
Block
65 100
mA
Ω
ROH
ROL
Isource
Isink
10
10
20
20
Output ON resistor
PDRV=15mA
Ω
Duty≥95% NDRV=0V
Duty≤5% NDRV=5V
NDRV=-15mA
Output source current
Output sink current
-
-130 -80 mA
NDRV1,2 Output
Block
65 100
mA
Ω
ROH
ROL
10
10
20
20
Output ON resistor
NDRV=15mA
Ω
Active mode
Standby mode
CTL=5.0V
VCC-
VIH
VIL
VCC
V
V
1
0
CTL input voltage
Control Block
VCC/
2
20
CTL input Current
VCC reset ON voltage
VCC reset hysteresis
3V3 reset ON voltage
3V3 reset hysteresis
EI reset ON voltage
EI reset hysteresi
ICTL
VRSTON1
VRSTON1 hys
VRSTON2
VRSTON2 hys
VRSTON3
VRSTON hys
VOL
µA
4.10 4.20 4.30
-100
2.94 3.0 3.06
-60 60 mV
1.12 1.22 1.32
-100 100 MV
V
100 mV
RESET Monitor
Block
V
V
-
IL =1mA
Reset output voltage
Reset leakage current
0.4
2.0
V
ILeak
µA
2F, No.10, Prosperity RD. II, Science-Based Industrial Park, Hsinchu 300,Taiwan, R.O.C.
Tel: 886-3-563-0878
Fax: 886-3-563-0879
WWW: http://www.aimtron.com.tw
Email: service@aimtron.com.tw
5
AT1369
Preliminary Product Information
2-Channel Synchronous Buck PWM Controller
with Power Good Reset
Typical Application Circuit: 3V3 and 2V Output
2F, No.10, Prosperity RD. II, Science-Based Industrial Park, Hsinchu 300,Taiwan, R.O.C.
Tel: 886-3-563-0878
Fax: 886-3-563-0879
WWW: http://www.aimtron.com.tw
Email: service@aimtron.com.tw
6
AT1369
Preliminary Product Information
2-Channel Synchronous Buck PWM Controller
with Power Good Reset
CH1:PDRV2
CH2:NDRV2
CH3:Output 2.0V/1A(AC ripple)
Fig1. Input 5V, Output 2.0V/1A
2F, No.10, Prosperity RD. II, Science-Based Industrial Park, Hsinchu 300,Taiwan, R.O.C.
Tel: 886-3-563-0878
Fax: 886-3-563-0879
WWW: http://www.aimtron.com.tw
Email: service@aimtron.com.tw
7
AT1369
Preliminary Product Information
2-Channel Synchronous Buck PWM Controller
with Power Good Reset
CH1:PDRV1
CH2:NDRV1
CH3:Output 3.3V/2A(AC ripple)
Fig2. Input 5V, Output 3.3V/2A
2F, No.10, Prosperity RD. II, Science-Based Industrial Park, Hsinchu 300,Taiwan, R.O.C.
Tel: 886-3-563-0878
Fax: 886-3-563-0879
WWW: http://www.aimtron.com.tw
Email: service@aimtron.com.tw
8
AT1369
Preliminary Product Information
2-Channel Synchronous Buck PWM Controller
with Power Good Reset
2F, No.10, Prosperity RD. II, Science-Based Industrial Park, Hsinchu 300,Taiwan, R.O.C.
Tel: 886-3-563-0878
Fax: 886-3-563-0879
WWW: http://www.aimtron.com.tw
Email: service@aimtron.com.tw
9
AT1369
Preliminary Product Information
2-Channel Synchronous Buck PWM Controller
with Power Good Reset
Vin=4 cell AA Battery
2F, No.10, Prosperity RD. II, Science-Based Industrial Park, Hsinchu 300,Taiwan, R.O.C.
Tel: 886-3-563-0878
Fax: 886-3-563-0879
WWW: http://www.aimtron.com.tw
Email: service@aimtron.com.tw
10
AT1369
Preliminary Product Information
2-Channel Synchronous Buck PWM Controller
with Power Good Reset
How to control CH1 and CH2 ON/OFF:
2F, No.10, Prosperity RD. II, Science-Based Industrial Park, Hsinchu 300,Taiwan, R.O.C.
Tel: 886-3-563-0878
Fax: 886-3-563-0879
WWW: http://www.aimtron.com.tw
Email: service@aimtron.com.tw
11
AT1369
Preliminary Product Information
2-Channel Synchronous Buck PWM Controller
with Power Good Reset
Package Outline 20-pin SSOP
MILLIMETERS
SYMBOL
MIN
TYP
MAX
A
A1
A2
b
1.35
0.10
-
1.63
0.15
-
1.75
0.25
1.50
0.30
0.25
8.74
6.20
3.99
1.27
-
0.20
0.18
8.56
5.79
3.81
0.41
-
-
C
D
E
-
8.66
5.99
3.91
0.635
0.635
-
E1
L
e
y
-
0°
0.076
8°
θ
2F, No.10, Prosperity RD. II, Science-Based Industrial Park, Hsinchu 300,Taiwan, R.O.C.
Tel: 886-3-563-0878
Fax: 886-3-563-0879
WWW: http://www.aimtron.com.tw
Email: service@aimtron.com.tw
12
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