ETC AX1509S-ADJ

Page No. : 1/8
AX1509
150KHz, 2A PWM Buck DC/DC Converter
8-Lead Plastic DIP-8
Package Code: P
Description
The AX1509 is Monolithic IC that design for a step-down DC/DC Converter, and own the
ability of driving a 2A load without additional transistor component. The output version
included 3.3V, 5V, 12V and an adjustable type. It operates at a switching frequency of
150KHz thus allowing smaller sized filter components than what would be needed with lower
frequency switching regulators. Other features include a guaranteed ±4% tolerance on
output voltage under specified input voltage and output load conditions, and ±15% on the
oscillator frequency. Regarding protected function, thermal shutdown is to prevent over
temperature operating from damage, and current limit is against over current operating of
the output switch.
•
8-Lead Plastic SOP-8
Package Code: S
Features
• 3.3V, 5V, 12V and adjustable
• Adjustable version output voltage range: 1.25-18V
• ±4% max over line and load conditions
• 150KHz ±15% fixed switching frequency
• TTL shutdown capability
• Operating voltage can be up to 22V
• Output load current: 2A
• SOP-8 and DIP-8 packages
• Low power standby mode
• Thermal-shuntdown and current-limit protection
• High efficiency
• Built-in switching a transistor on chip, requires only 4 external components
Applications
• Simple High-efficiency step-down regulator
• Positive to negative converter
• On-card switching regulators
Pin Connections
8
1
7
2
6
3
5
4
DS-AX1509-01 Aug, 2006
Pin1: Operating Voltage Input
Pin5: Ground
Pin2: Switch Output
Pin6: Ground
Pin3: Output Voltage Feedback Control
Pin7: Ground
Pin4: ON/OFF Shutdown
Pin8: Ground
www.Orister.com
Page No. : 2/8
Pin Connections
SD
VIN
+
Current
Source
Bias
11.235V
25V
Reference
2.5V
Regulator
Start
Up
200mV
+
220mV
R
+
COMP
Current
Limit
FB
R2
+
AMP
COMP
+
R1=2.5K
+
COMP
-
COMP
+
3A
Switch
Driver
150KHz
OSC.
Output
Thermal
Limit
GND
Absolute Maxium Rating (Note1)
Symbol
Value
Unit
Supply Voltage
Parameter
VCC
+24
V
On/Off Pin Input Voltage
VSD
-0.3~+18
V
Feedback Pin Voltage
VFB
-0.3~+18
V
Output Voltage to Ground
VOUT
-1
V
Power Dissipation
PD
Internally Limited
W
Operating Temperature
Topr
-40~+125
o
C
o
C
Storage Temperature
Tstg
-65~+150
Operating Voltage
VOP
+4.5~+22
V
Electrical Characteristics (Continued)
o
(Note 2)
Specifications with boldface type apply over for full operating temperature range, the other type are for TJ=25 C
Part No.
AX1509-3.3
Parameter
Output Voltage
Efficiency
AX1509-5.0
Output Voltage
Efficiency
AX1509-12
Output Voltage
Efficiency
AX1509-ADJ
Output Voltage
Efficiency
DS-AX1509-01 Aug, 2006
Symbol
VOUT
η
VOUT
η
VOUT
η
VOUT
η
Conditions
4.75V≤VIN≤22V, 0.2A≤ILOAD≤2A
VIN=12V, ILOAD=2A
7V≤VIN≤22V, 0.2A≤ILOAD≤2A
VIN=12V, ILOAD=2A
15V≤VIN≤22V, 0.2A≤ILOAD≤2A
VIN=25V, ILOAD=2A
4.5V≤VIN≤22V, 0.2A≤ILOAD≤2A
VOUT programmed for 3V
VIN=12V, VOUT=3V, ILOAD=2A
Min.
Typ.
Max.
(Note3) (Note4)
3.168
3.135
3.3
-
Unit
3.342
3.465
V
73
-
%
4.800
4.750
5.0
5.200
5.250
V
-
80
-
%
11.52
11.40
12.0
12.48
12.60
V
-
90
-
%
1.213
1.200
1.25
1.287
1.300
V
-
73
-
%
www.Orister.com
Page No. : 3/8
All Output Voltage Versions Electrical Characteristics
o
Specifications with boldface type apply over for full operating temperature range, the other type are for TJ=25 C
(Unless otherwise specified, VIN=12V for the 3.3V, 5V, and adjustable version and VIN=18V for the 12V version, ILOAD=500mA)
Parameter
Symbol
Test Condition
Min.
Typ.
Max.
Unit
-
-10
-50
-100
nA
120
110
150
173
173
KHz
-
1.3
1.4
1.5
V
-
100
0
-
%
3.6
4.5
6.5
7.5
A
Device Parameters
Feedback Bias Current
Ib
Adjustable Version Only, VFB=1.3V
Oscillator Frequency
fO
(Note 5)
IOUT=2A (Note 6,7)
Saturation Voltage
VSAT
Max. Duty Cycle (ON)
Min. Duty Cycle (OFF)
DC
(Note 8)
Current Limit
ICL
Peak Current (Note 6,7)
(Note 7)
(Note 6,8)
Output Leakage Current
IL
Output=0V
-
-
-50
uA
Quiescent Current
IQ
(Note 8)
-
5
10
mA
ON/OFF pin=5V (Note 9)
-
150
250
300
uA
DIP-8
Junction to
Case
-
14
-
-
15
-
Junction to
ambient
-
80
-
-
70
-
Standby Quiescent Current
ISTBY
θJC
Thermal Resistance
θJA
(Note 10)
SOP-8
DIP-8
SOP-8
o
C/W
o
C/W
ON/OFF Control
ON/OFF Pin Logic Input Threshold
Voltage
ON/OFF Pin Input Current
VIH
Low (Regulator ON)
-
VIL
High (Regulator OFF)
IIH
VLOGIC=2.5V (Regulator OFF)
-
-5
-15
IIL
VLOGIC=0.5V (Regulator ON)
-
-0.02
-5
2.0
0.6
1.3
-
V
uA
Note 1: Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Operating Ratings indicate conditions for which
the device is intended to be functional, but do not guarantee specific performance limits. For guaranteed specifications and test conditions,
see the Electrical Characteristics.
Note 2: External components such as the catch diode, inductor, input and output capacitors, and voltage programming resistors can affect
switching regulator system performance.
o
Note 3: Typical numbers are at 25 C and represent the most likely norm.
Note 4: All limits guaranteed at room temperature (standard type face) and at temperature extremes (bold type face). All room temperature limits
are 100% production tested. All limits at temperature extremes are guaranteed via correlation using standard Statistical Quality Control
(SQC) methods. All limits are used to calculate Average Outgoing Quality Level (AOQL).
Note 5: The switching frequency is reduced when the second stage current limit is activated.
Note 6: No diode, inductor or capacitor connected to output pin.
Note 7: Feedback pin removed from output and connected to 0V to force the output transistor switch ON.
Note 8: Feedback pin removed from output and connected to 12V for the 3.3V, 5V, ADJ. version, and 15V for the 12V version, to force the output
transistor switch OFF.
Note 9: VIN=22V.
2
Note 10: Junction to ambient thermal resistance. (With copper area of approximately 3in )
DS-AX1509-01 Aug, 2006
www.Orister.com
Page No. : 4/8
Characteristics Curve
Normalized Output Voltage
Shutdown Quiescent Current
160
1.5
VIN=12V
140
ILOAD=200mA
120
0.5
Current (uA)
Output Voltage Change (%)..
1
0
100
VON/VOFF=5V
80
o
TJ=25 C
60
-0.5
40
-1
20
-1.5
0
25
50
75
100
125
150
0
175
0
o
10
20
30
Supply Voltage (V)
Junction Temperature ( C)
40
Switch Saturation Voltage
Switch Current Limit
1.30
6.00
VIN=12V
TJ=25oC
1.20
5.80
Saturation Voltage (V)
Switch Current Limit (A)
5.90
5.70
5.60
VIN=12V
5.50
VOUT =5V
5.40
1.10
1.00
0.90
5.30
0.80
5.20
0
25
50
75
100
125
o
150
0
1
2
3
4
Switch Current (A)
Junction Temperature ( C)
On/Off Pin Current (Sinking)
12
10
Vin=22V
Current (uA)
8
Tj=25℃
6
4
2
0
0
5
10
15
20
25
30
On/Off Pin Voltage (V)
DS-AX1509-01 Aug, 2006
www.Orister.com
Page No. : 5/8
Typical Application Circuit
Fig.1 Fixed Type Circuit
3 FB
+
AX1509
1
Vin
DC
C1
680uF
2
Fix Output
4
5
6
7
8
Output
SD Gnd Gnd Gnd Gnd
L1
33uH
D1
1N5825
L
O
A
D
C2
220uF
Fig.2 Adjustable Output Voltage Versions
R2
R1
3 FB
1K
1
+
Vin
DC
DS-AX1509-01 Aug, 2006
C1
680uF
AX1509
2
Adjustable Output
4
5
6
7
8
Output
SD Gnd Gnd Gnd Gnd
L1
47uH
D1
1N5825
C2
220uF
L
O
A
D
www.Orister.com
Page No. : 6/8
DIP-8 Dimension
8
6
7
Marking:
5
A
1
2
3
4
B
J
Note: Green label is used for pb-free packing
Pin Style: 1.Vin 2.Output 3.FB 4.SD
5.Gnd 6.Gnd 7.Gnd 8.Gnd
F
E
C
G
M
H
D
I
Material:
• Lead solder plating: Sn60/Pb40 (Normal),
Sn/3.0Ag/0.5Cu or Pure-Tin (Pb-free)
• Mold Compound: Epoxy resin family,
flammability solid burning class: UL94V-0
α1 K
DIM
A
B
C
D
E
F
G
H
I
J
K
L
M
α1
Min.
6.29
9.22
3.25
3.17
0.38
2.28
7.49
8.56
0.229
o
94
Max.
6.40
9.32
*1.52
*1.27
*0.99
3.35
3.55
0.53
2.79
7.74
*3.00
8.81
0.381
o
97
*: Typical, Unit: mm
L
8-Lead DIP-8
Plastic Package
Package Code: P
SOP-8 Dimension
A
8
7
B
6
3
I
5
C
Pin1 Index
2
Marking:
G
H
4
Note: Green label is used for pb-free packing
Pin Style: 1.Vin 2.Output 3.FB 4.SD
5.Gnd 6.Gnd 7.Gnd 8.Gnd
J
D
K
E
Part A
Part A
F
M
L
N
Material:
• Lead solder plating: Sn60/Pb40 (Normal),
Sn/3.0Ag/0.5Cu or Pure-Tin (Pb-free)
• Mold Compound: Epoxy resin family,
flammability solid burning class: UL94V-0
DIM
A
B
C
D
E
F
G
H
I
J
K
L
M
N
O
Min.
4.85
3.85
5.80
1.22
0.37
3.74
1.45
4.80
0.05
0.30
0.19
0.37
0.23
0.08
0.00
Max.
5.10
3.95
6.20
1.32
0.47
3.88
1.65
5.10
0.20
0.70
0.25
0.52
0.28
0.13
0.15
*: Typical, Unit: mm
O
8-Lead SO-8 Plastic
Surface Mounted Package
Package Code: S
Ordering Information
Part Number
AX1509S-ADJ
AX1509S -3.3
AX1509S -5.0
AX1509S -12
DS-AX1509-01 Aug, 2006
Package
SOP-8
SOP-8
SOP-8
SOP-8
Part Number
AX1509P-ADJ
AX1509P -3.3
AX1509P -5.0
AX1509P -12
Package
DIP-8
DIP-8
DIP-8
DIP-8
www.Orister.com
Page No. : 7/8
Soldering Methods for Orister’s Products
1. Storage environment: Temperature=10oC~35oC Humidity=65%±15%
2. Reflow soldering of surface-mount devices
Figure 1: Temperature profile
tP
Critical Zone
TL to TP
TP
Ramp-up
TL
tL
Temperature
Tsmax
Tsmin
tS
Preheat
25
Ramp-down
t 25oC to Peak
Time
Profile Feature
Sn-Pb Eutectic Assembly
Pb-Free Assembly
<3 C/sec
<3oC/sec
- Temperature Min (Tsmin)
100oC
150oC
- Temperature Max (Tsmax)
150oC
200oC
60~120 sec
60~180 sec
<3oC/sec
<3oC/sec
183oC
217oC
Average ramp-up rate (TL to TP)
o
Preheat
- Time (min to max) (ts)
Tsmax to TL
- Ramp-up Rate
Time maintained above:
- Temperature (TL)
- Time (tL)
60~150 sec
Peak Temperature (TP)
Time within 5oC of actual Peak
Temperature (tP)
Ramp-down Rate
Time 25oC to Peak Temperature
o
o
60~150 sec
240 C +0/-5 C
260oC +0/-5oC
10~30 sec
20~40 sec
<6oC/sec
<6oC/sec
<6 minutes
<8 minutes
Peak temperature
Dipping time
3. Flow (wave) soldering (solder dipping)
Products
Pb devices.
Pb-Free devices.
DS-AX1509-01 Aug, 2006
o
o
245 C ±5 C
5sec ±1sec
260oC +0/-5oC
5sec ±1sec
www.Orister.com
Page No. : 8/8
Important Notice:
• All rights are reserved. Reproduction in whole or in part is prohibited without the prior written approval of Orister Corporation.
• Orister Corporation reserves the right to make changes to its products without notice.
• Orister Corporation products are not warranted to be suitable for use in Life-Support Applications, or systems.
• Orister Corporation assumes no liability for any consequence of customer product design, infringement of patents, or application assistance.
Contact Info:
Orister Corporation
• No. 8, Lane 136, Jiaren St., ZhuBei City,
HsinChu Country 302, Taiwan
• TEL: +886 3 5588 908
• FAX: +886 3 5588 909
• http://www.orister.com
• [email protected]
DS-AX1509-01 Aug, 2006
www.Orister.com