AT1368BP-GRE [GMT]
Switching Regulator/Controller,;
| 型号： | AT1368BP-GRE |
| 厂家： | 
GLOBAL MIXED-MODE TECHNOLOGY INC |
| 描述： | Switching Regulator/Controller, |
| 文件： | 总12页 (文件大小：456K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
AT1368
Preliminary Product Information
1-Channel Synchronous Buck PWM Controller
with Power Good Reset
Features
General Description
• High efficiency (min. 90% On I =300mA
O
~600mA)
The AT1368 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 AT1368 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
AT1368 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 1mA
• Monitor the input voltage and 3V3 output
• 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
AT1368
Preliminary Product Information
1-Channel Synchronous Buck PWM Controller
with Power Good Reset
Pin Configuration
Ordering Information
Part number
AT1368AR
AT1368AP
AT1368BR
AT1368BP
Package
Marking
AT1368AR
SSOP16
TSSOP16
SSOP16
AT1368AP
AT1368BR
TSSOP16
AT1368BP
_
TSSOP16,Green
AT1368BP, date code with one bottom line
AT1368BP GRE
A: fosc =300KHz B: fosc =600KHz
Pin Description
Symbol Pin No.
Descript
Symbol
Pin
Descript
No.(A/B)
FB
1
Inverting input to error SCP
9
Short-Circuit protection
amplifier
COMP
PVCC
2
3
Error amplifier output
Power blocks power
supply
CTL
NC
10
11
Chip enable, high active
-
PDRV
4
Output for Pch-MOSFET
IN1
12
VCC monitor voltage
adjustable input pin
Power Good indicator
3V3 output monitor
adjustable input pin
Sotf-start
NDRV
PGND
5
6
Output for Nch-MOSFET RESET
13
14
Power blocks ground
IN2
GND
VCC
7
8
Control blocks ground
Control blocks power
supply
SS
15
16
3V3
Output voltage 3.3V
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
AT1368
Preliminary Product Information
1-Channel Synchronous Buck PWM Controller
with Power Good Reset
Absolute Maximum Ratings
Parameter
Condition
Rated Value
Unit
Min.
Max.
Power Supply Voltage
Source Average Current of PDRV,
NDRV
—
—
-
+8
V
-
-50
mA
Sink Average Current of PDRV,
NDRV
—
—
—
—
-
-
-
50
mA
mA
mA
Source Peak Current of PDRV,
NDRV
-200
200
Sink Peak Current of PDRV,
NDRV
Input Voltage to Error Amplifier
-
-
-
-30
-55
6.5
560
500
+85
+125
V
Continuous power dissipation
mW
mW
SSOP16（T =+25℃）
a
TSSOP16（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
VCTL
TOP
2.5
--
7
Ｖ
V
°C
0
--
7
-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
AT1368
Preliminary Product Information
1-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
1.0 1.5 mA
OSC
Current in standby mode
Reference Voltage
IST
10
1.20 1.22 1.24
µA
V
Entire device
T =-20℃ to +85℃
a
VREF
VCC=2.5V to 7.0V
Reference Voltage
line-regulation
VREF-Line
1
5
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
AT1368A
AT1368B
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
-1.0
Charge Current of
ICSS
µA
V
SS
Soft-Start
Invalid threshold
voltage of SS
1.0
Charge Current of
ICSCP
-1.5 -1.25 -1.0
0.8 0.9 1.0
µA
SS
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
AT1368
Preliminary Product Information
1-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
PDRV Output
Block
65 100
mA
Ω
ROH
ROL
Isource
Isink
18
16
30
25
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
NDRV Output
Block
65 100
mA
Ω
ROH
ROL
18
16
30
25
Output ON resistor
CTL input voltage
NDRV=15mA
Ω
Active mode
VCC-
VIH
VCC
V
1
0
Control Block
Standby mode
CTL=5.0V
VCC rising
VCC falling
3V3 rising
3V3 falling
IL =1mA
VIL
ICTL
-
V
µA
V
CTL input Current
20
VCC reset ON voltage
VCC reset hysteresis
3V3 reset ON voltage
3V3 reset hysteresis
Reset output voltage
Reset leakage current
VRSTON1
VRSTON1 hys
VRSTON2
VRSTON2 hys
VOL
4.10 4.20 4.30
100 mV
RESET Monitor
Block
2.94 3.0 3.06
V
100 mV
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
AT1368
Preliminary Product Information
1-Channel Synchronous Buck PWM Controller
with Power Good Reset
Typical Application Circuit: 3V3 Output
L1: AT1368A: 22µH/0.77A/104mΩ TDK-SLF6028T-220MR77
AT1368B: 10µH/1A/74.5mΩ
TDK-SLF6028T-100M1R0
R1: AT1368A: 100K
AT1368B: 10K
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
AT1368
Preliminary Product Information
1-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
7
AT1368
Preliminary Product Information
1-Channel Synchronous Buck PWM Controller
with Power Good Reset
Typical Application Circuit: 2V5 Output
*1V8 Output: R4:9.8KΩ R5:38.7KΩ
*Vin from 2.5V to 7V, disable SCP function
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
AT1368
Preliminary Product Information
1-Channel Synchronous Buck PWM Controller
with Power Good Reset
Typical Application Circuit: Zeta converter 3V3 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
9
AT1368
Preliminary Product Information
1-Channel Synchronous Buck PWM Controller
with Power Good Reset
CH1:Reset CH2:SS CH3:Vout CH4:Vin
Fig.1 Vout:3.3V/1A Vin:5V Start-Up Waveform
Fig.2 Vout:2.5V/1A Vin:3.1V Start-Up Waveform
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
AT1368
Preliminary Product Information
1-Channel Synchronous Buck PWM Controller
with Power Good Reset
Package Outline 16-pin SSOP
MILLIMETERS
INCHES
TYP
SYMBOL
MIN
TYP
MAX
MIN
MAX
A
A1
A2
b
1.35
0.10
-
1.60
0.15
-
1.75
0.25
1.50
0.30
0.25
5.00
-
0.053
0.004
-
0.063
0.006
-
0.069
0.010
0.059
0.012
0.010
0.197
-
0.20
0.18
4.80
-
-
0.008
0.007
0.189
-
-
C
-
-
D
4.85
0.20
5.99
3.91
0.71
0.64
-
0.191
0.008
0.236
0.154
0.028
0.025
-
ZD
E
5.79
3.81
0.41
-
6.20
3.99
1.27
-
0.228
0.150
0.016
-
0.244
0.157
0.050
-
E1
L
e
y
-
0°
0.076
8°
-
0°
0.003
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
11
AT1368
Preliminary Product Information
1-Channel Synchronous Buck PWM Controller
with Power Good Reset
Package Outline 16-pin TSSOP
MILLIMETERS
INCHES
TYP
SYMBOL
MIN
TYP
MAX
MIN
MAX
A
A1
A2
b
1.05
0.05
-
1.10
0.10
1.00
0.25
0.127
5.075
6.40
4.40
0.60
0.65
-
1.20
0.15
1.05
0.28
-
0.041
0.002
-
0.043
0.004
0.039
0.010
0.005
0.1998
0.252
0.173
0.024
0.026
-
0.047
0.006
0.041
0.011
-
0.20
-
0.008
-
C
D
E
4.90
6.20
4.30
0.50
-
5.10
6.60
4.50
0.70
-
0.193
0.244
0.170
0.020
-
0.200
0.260
0.177
0.028
-
E1
L
e
y
-
0°
0.076
8°
-
0°
0.003
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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