AIMTRON AT1369BR-GRE

AT1369
Preliminary Product Information
2-Channel Synchronous Buck PWM Controller
with Power Good Reset
Features
• High efficiency (min. 90% On IO=300mA
~600mA)
• 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
General Description
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 NChannel 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 stepdown 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.
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
WWW: http://www.aimtron.com.tw
Fax: 886-3-563-0879
Email: [email protected]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
AT1369AR_GRE
AT1369BR
AT1369BR_GRE
A: fosc =300KHz
Package
SSOP20
SSOP20,Green
SSOP20
SSOP20,Green
Marking
AT1369AR
AT1369AR, Date Code with one bottom line
AT1369BR
AT1369BR, Date Code with one bottom line
B: fosc =600KHz
Pin Description
Symbol
Pin No.
Descript
Symbol
Pin
No.(A/B)
Descript
FB1
1
SS2
11
COMP1
PVCC
2
3
SCP
CTL
12
13
PDRV1
4
Inverting input to error
amplifier 1
Error amplifier1 output
Power blocks power
supply
Output1 for Pch-MOSFET
VCC
14
NDRV1
NDRV2
PDRV2
5
6
7
Output1 for Nch-MOSFET GND
Output2 for Nch-MOSFET RESET
Output2 for Pch-MOSFET
IN1
15
16
17
PGND
COMP2
8
9
Power blocks ground
Error amplifier1 output
EI
3V3
18
19
Control blocks power
supply
Control blocks ground
Power Good indicator
VCC monitor voltage
adjustable input pin
Adjustable Reset input
Output voltage 3.3V
FB2
10
Inverting input to error
amplifier 2
SS1
20
Sotf-start 1
Sotf-start 2
Short-Circuit protection
Chip enable, high active
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: [email protected]
2
AT1369
Preliminary Product Information
2-Channel Synchronous Buck PWM Controller
with Power Good Reset
Absolute Maximum Ratings
Parameter
Condition
Power Supply Voltage
—
Source Average Current of PDRV1,NDRV1
—
PDRV2,NDRV2
Sink Average Current of PDRV1,NDRV1,
—
PDRV2,NDRV2
Source Peak Current of PDRV1,NDRV1,
—
PDRV2,NDRV2
Sink Peak Current of PDRV1,NDRV1,
—
PDRV2,NDRV2
Input Voltage to Error Amplifier
—
Continuous power dissipation
SSOP20(Ta=+25℃)
Operating temperature
—
Storage temperature
—
Rated Value
Min.
Max.
+8
-50
Unit
V
mA
-
50
mA
-
-200
mA
-
200
mA
-30
-55
6.5
560
+85
+125
V
mW
0
C
0
C
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
Power supply voltage
Control input voltage
Operating temperature
Symbol
VCC
VCTL
TOP
Values
Min.
2.5
0
-20
Typ.
--+25
Unit
Max.
7
7
+85
V
V
°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: [email protected]
3
AT1369
Preliminary Product Information
2-Channel Synchronous Buck PWM Controller
with Power Good Reset
Electrical Characteristics
(VCC = 5V,Ta =+25℃ , unless otherwise noted. )
Parameter
Symbol
Condition
Values
Unit
Min. Typ. Max.
Input Supply Range
VCC
Quiescent Current
ICC
Current in standby mode
IST
Entire device
Reference Voltage
VREF
Reference Voltage
line-regulation
VREF-Line
Error amplifier
Frequency
Sawtooth wave
oscillator (OSC)
Soft-Start
Short-Circuit
Duty=50%,
fOSC=600KHz
PDRV/NDRV No Load
CTL=0V
Ta =-20℃ to +85℃
VIO
IOH
IOL
7.0
V
1.5
2.0
mA
10
µA
V
1
10
mV
0.5
1.5
%
-1.5
120
10
-2.0
80
mV
mA
μA
20
%
20
%
VCC=2.5V to 7.0V
VCOMP = VREF -0.5V
VCOMP = 0.5V
Ta =-20℃ to +85℃
--
1.20 1.22 1.24
Ta =-20℃ to +85℃
Rference Variation
with Temperature
Input Offset Voltage
Source Current
Sink Current
Source current Variation
with temperature
Sink current Variation
with temperature
Unity Gain Bandwidth
Common Mode Input
Voltage Range
DC Open Loop Gain
2.5
-1.0
160
Ta =-20℃ to +85℃
fT
10.0
VCOM
0.2
MHz
1.5
V
fosc
AT1369A
250
110
300
dB
350 KHz
fosc
AT1369B
500
600
700 KHz
AV
High Level Voltage
1.0
Low Level Voltage
Variation with Power
Supply
Variation with
temperature
Charge Current of
SS1,2
Invalid threshold
voltage of SS1,2
Charge Current of
SCP
Threshold Voltage of
SCP
0.5
ICSS1,2
ICSCP
V
V
Vcc=2.5V to 7V
2
Ta =-20℃ to +85℃
7
%
-0.8
µA
-1.5
-1.0
%
1.0
V
-1.7 -1.25 -1.0
µA
0.9
V
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: [email protected]
4
AT1369
Preliminary Product Information
2-Channel Synchronous Buck PWM Controller
with Power Good Reset
PDRV1,2 Output
Block
Output source current
Isource
Duty≥95% PDRV=0V
-
-130
Output sink current
Isink
Duty≤5% PDRV=5V
65
100
ROH
PDRV=-15mA
10
20
Ω
ROL
PDRV=15mA
10
20
Ω
Output source current
Isource
Duty≥95% NDRV=0V
-
-130
-80
mA
Output sink current
Isink
Duty≤5% NDRV=5V
65
100
ROH
NDRV=-15mA
10
20
Ω
ROL
NDRV=15mA
10
20
Ω
VCC1
VCC
V
0
VCC/
2
V
20
µA
Output ON resistor
NDRV1,2 Output
Block
Output ON resistor
Control Block
CTL input voltage
VIL
CTL input Current
VCC reset ON voltage
RESET Monitor
Block
VIH
ICTL
Active mode
Standby mode
CTL=5.0V
VRSTON1
VRSTON1 hys
-100
3V3 reset ON voltage
VRSTON2
2.94
3V3 reset hysteresis
VRSTON2 hys
-60
EI reset ON voltage
VRSTON3
VOL
Reset leakage current
ILeak
mA
mA
3.0
V
100
mV
3.06
V
60
mV
1.12 1.22 1.32
VRSTON hys
Reset output voltage
mA
4.10 4.20 4.30
VCC reset hysteresis
EI reset hysteresi
-80
-100
IL =1mA
-
V
100
MV
0.4
V
2.0
µA
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: [email protected]
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
WWW: http://www.aimtron.com.tw
Fax: 886-3-563-0879
Email: [email protected]
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
WWW: http://www.aimtron.com.tw
Fax: 886-3-563-0879
Email: [email protected]
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
WWW: http://www.aimtron.com.tw
Fax: 886-3-563-0879
Email: [email protected]
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
WWW: http://www.aimtron.com.tw
Fax: 886-3-563-0879
Email: [email protected]
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
WWW: http://www.aimtron.com.tw
Fax: 886-3-563-0879
Email: [email protected]
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
WWW: http://www.aimtron.com.tw
Fax: 886-3-563-0879
Email: [email protected]
11
AT1369
Preliminary Product Information
2-Channel Synchronous Buck PWM Controller
with Power Good Reset
Package Outline
20-pin SSOP
SYMBOL
A
A1
A2
b
C
D
E
E1
L
e
y
θ
MILLIMETERS
MIN
TYP
MAX
1.35
1.63
1.75
0.10
0.15
0.25
1.50
0.20
0.30
0.18
0.25
8.56
8.66
8.74
5.79
5.99
6.20
3.81
3.91
3.99
0.41
0.635
1.27
0.635
0.076
0°
8°
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: [email protected]
12