APE1801M [A-POWER]
IC SWITCHING REGULATOR, 400 kHz SWITCHING FREQ-MAX, PDSO8, LEAD FREE, SOP-8, Switching Regulator or Controller;
| 型号： | APE1801M |
| 厂家： | 
ADVANCED POWER ELECTRONICS CORP. |
| 描述： | IC SWITCHING REGULATOR, 400 kHz SWITCHING FREQ-MAX, PDSO8, LEAD FREE, SOP-8, Switching Regulator or Controller 开关 光电二极管 |
| 文件： | 总8页 (文件大小：676K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
Advanced Power
Electronics Corp.
APE1801
PWM Control 2A Step-Down Converter
GENERAL DESCRIPTION
-
FEATURES
APE1801 consists of step-down switching regulator with PWM control. These
devise include a reference voltage source, oscillation circuit, error amplifier,
internal PMOS and etc.
Input voltage：3.6V to 20V
Output voltage：0.8V to Vcc
Duty ratio：0% to 100% PWM control
Oscillation frequency：330KHz typ.
-
-
APE1801 provides low-ripple power, high efficiency, and excellent transient
characteristics. The PWM control circuit is able to vary the duty ratio linearly
from 0 up to 100%. This converter also contains an error amplifier circuit as well
as a soft-start circuit that prevents overshoot at startup. An enable function, an
over current protect function and short circuit protect function are built inside, and
when OCP or SCP happens, the operation frequency will be reduced. Also, an
internal compensation block is built in to minimum external component count.
With the addition of an internal P-channel Power MOS, a coil, capacitors, and
a diode connected externally, these ICs can function as step-down switching
regulators. They serve as ideal power supply units for portable devices when
coupled with the SOP-8L package, providing such outstanding features as low
current consumption. Since this converter can accommodate an input voltage
up to 20V, it is also suitable for the operation via an AC adapter.
-
-
-
-
-
-
Soft-Start(SS), Current Limit(CL), Enable function.
Thermal Shutdown function.
Short Circuit Protect (SCP).
Built-in internal SW P-channel MOS.
SOP-8L Pb-Free package.
This datasheet contains new product information. Advanced Power Electronics Corp. reserves the rights to modify the product specification without notice. No liability is assumed as
a result of the use of this product. No rights under any patent accompany the sale of the product.
200726073-1/7
Advanced Power
Electronics Corp.
APE1801
PWM Control 2A Step-Down Converter
Block Diagram
SW
Oscillation
Circuit
Reference Voltage
Source with Soft Start
Vcc
+
PWM Switched
-
Control Circuit
-
FB
Thermal
Shutdown
Vss
110uA
VEN
EN
OCSET
PIN ASSIGNMENT
The package of APE1801 is SOP-8L; the pin assignment is given by:
Name
Description
Feedback pin
Power-off pin
H：normal operation(Step-down)
L：Step-down operation stopped
(All circuits deactivated)
FB
EN
( Top View )
Vss
Vss
SW
SW
1
2
3
4
8
7
6
5
FB
EN
APE1801
Ocset
Vcc
Add an external resistor to set max
switch output current.
OCSET
VCC
SW
VSS
IC power supply pin
Switch pin. Connect external
inductor & diode here.
SOP–8L
GND pin
ORDER/MARKING INFORMATION
Order Information
Top Marking
X
APE1801
Part number
1801M
ID code: internal
WW: 01~52
Y W W X X X
Package Type
M : SOP-8L
Year : 7 = 2007
2/7
Advanced Power
Electronics Corp.
APE1801
PWM Control 2A Step-Down Converter
Absolute Maximum Ratings (at Ta=25
℃
)
Characteristics
Symbol
VCC
VFB
Rating
Unit
V
VCC Pin Voltage
VSS - 0.3 to VSS + 22
VSS - 0.3 to VCC
VSS - 0.3 to VCC + 0.3
VSS - 0.3 to VCC + 0.3
Internally limited
-40 to +150
Feedback Pin Voltage
V
ON/OFF Pin Voltage
VEN
VSW
PD
V
Switch Pin Voltage
V
Power Dissipation
mW
℃
℃
V
Storage Temperature Range
Operating Temperature Range
Operating Supply Voltage
Thermal Resistance from Junction to case
TST
TOP
VOP
θJC
-20 to +125
+3.6 to +20
25
℃/W
℃/W
Thermal Resistance from Junction to ambient
θJA
70
Note : θJA is measured with the PCB copper area(need connect to SW pins) of approximately 1 in2(Multi-layer).
Electrical Characteristics (VIN = 12V, Ta=25
℃
, unless otherwise specified)
Characteristics
Symbol
VFB
Conditions
Min Typ Max Units
Feedback Voltage
IOUT=0.1A
0.784 0.800 0.816
V
mA
uA
Quiescent Current
ICCQ
VFB=1.2V force driver off
IOUT=0.1A
-
3
0.1
2
5
0.5
10
125
-
Feedback Bias Current
Shutdown Supply Current
OCSET pin bias current
Switch Current
IFB
-
ISD
VEN =0V
-
uA
IOCSET
95
110
-
uA
ISW
3.0
A
%
%
Line Regulation
△VOUT/VOUT VCC = 5V~20V, IOUT=0.2A
△VOUT/VOUT IOUT = 0.1 to 2A
-
1
2
Load Regulation
-
0.2
0.5
Oscillation Frequency
EN Pin Logic input
threshold voltage
FOSC
VSH
VSL
ISH
SW pin
260
330 400 KHz
High (regulator ON)
Low (regulator OFF)
VEN=2.5V (ON)
VEN=0.3V (OFF)
2.0
-
-
-
0.8
-
V
-
-
-
20
-10
4
uA
uA
ms
EN Pin Input Current
Soft-Start Time
ISL
-
TSS
0.3
-
8
VCC=5V, VFB=0V
100 140
Internal MOSFET RDSON
RDSON
EFFI
mΩ
VCC=12V, VFB=0V
VCC = 12V, IOUT = 1A
-
70
92
92
100
Efficiency
-
-
%
VOUT = 5V
I
OUT = 2A
3/7
Advanced Power
Electronics Corp.
APE1801
PWM Control 2A Step-Down Converter
Application Circuit
VIN+12V
R4
APE1801
100K
1
2
3
4
8
7
6
5
ON/OFF
FB
VSS
EN
VSS
SW
SW
R3
VOUT = 5V/2A
L1
1.3K
C2
C3
470uF 0.1uF
1
2
OCSET
VCC
33uH
C1
1nF
R1
30K
D1
B340
C8
C4
470uF
0.1uF
R2
5.6K
R1
R2
VOUT = VFB x (1 +
)
VFB = 0.8V ; R2 suggest 0.8K ~ 6k
L1 recommend value (VIN=12V ,IOUT=2A,)
VOUT
1.8 V
18uH
2.5V
3.3V
5V
L1 Value
22uH
27uH
33uH
Function Descriptions
PWM Control
The APE1801 consists of DC/DC converters that employ a pulse-width modulation
(PWM) system. In converters of the APE1801, the pulse width varies in a range from 0 to
100%, according to the load current. The ripple voltage produced by the switching can
easily be removed through a filter because the switching frequency remains constant.
Therefore, these converters provide a low-ripple power over broad ranges of input
voltage and load current.
RDS(ON) Current Limiting
The current limit threshold is setting by the external resistor (R3) connecting from VCC
supply to OCSET pin. The internal 110uA sink current crossing the resistor sets the
voltage at pin of OCSET. When the PWM voltage is less than the voltage at OCSET, an
over-current condition is triggered. Please refer to the formula for setting the current limit
value
IOCSET
×
R3 + 0.08
=
ISW(MAX)
RDS(ON)
( Normally, The ISW(MAX) setting more than IOUT 1.0A ).
Example:
ISW = (110uA x 1.3k + 0.08)/ 70mΩ= 3.2A
ISW = (0.11 x 1.3 + 0.08)/ 0.07= 3.2A
4/7
Advanced Power
Electronics Corp.
APE1801
PWM Control 2A Step-Down Converter
Setting the Output Voltage
Application circuit item shows the basic application circuit with APE1801 adjustable
output version. The external resistor sets the output voltage according to the following
equation:
R1
⎛
⎝
⎞
⎠
= 0.8V × 1+
⎜
⎟
VOUT
R2
Table 1 Resistor select for output voltage setting
VOUT
R2
R1
1.3K
5.6K
1.5K
5.6K
2.2K
5.6K
2K
6.8K
30K
4.7K
18K
4.7K
12K
2.5K
2.0K
1.5K
5V
3.3V
2.5V
1.8V
1.5V
1.2V
2.2K
3K
R2 setting 5.6k that system operation current (No load) can be reduce to under 4mA.
VIN>+9V
R4
APE1801
FB
100K
1
2
3
4
8
7
6
5
ON/OFF
VSS
VSS
SW
EN
R3
1.3K
VOUT = 5V/2A
L1
C2
470uF 0.1uF
1
2
C3
OCSET
VCC
33uH
C1
1nF
R1
30K
SW
D1
C4
C8
0.1uF
B340
470uF
R2
5.6K
PCB Layout Guide
If you need low Tc & Tj or large PD(Power Dissipation), The dual SW pins(5&6) on the
SOP-8L package are internally connected to die pad, The PCB layout should allow for
maximum possible copper area at the SW pins.
1. Connect C3 to VCC pin as closely as possible to get good power filter effect.
2. Connect R3 to VCC pin as closely as possible.
3. Connect ground side of the C2 & D1 as closely as possible.
5/7
Advanced Power
Electronics Corp.
APE1801
PWM Control 2A Step-Down Converter
Typical Characteristics
VFB VS VIN
ICCQ VS VIN
ICCQ VS VIN
VFB VS VIN
6.0
5.0
4.0
3.0
2.0
1.0
0.0
0.820
0.815
0.810
0.805
0.800
0.795
0.790
0.785
0.780
3
5
7
9
11 13 15 17 19 21
Vin(V)
3
5
7
9
11 13 15 17 19 21
Vin(V)
FOSC VS VIN
FOSC VS TEMPERATURE
Fosc vs Temperature
FOSC VS VIN
360.0
350.0
340.0
330.0
320.0
310.0
300.0
290.0
280.0
360.0
350.0
340.0
330.0
320.0
310.0
300.0
290.0
280.0
-20
0
20 40
60
80 100 120
3
5
7
9
11 13 15 17 19 21
Vin(V)
Temp (
)
℃
VFB VS TEMPERATURE
ICCQ VS TEMPERATURE
Iccq vs Temperature
VFB vs temperature
6.0
5.0
4.0
3.0
2.0
1.0
0.0
0.820
0.815
0.810
0.805
0.800
0.795
0.790
0.785
0.780
-20
0
20
40
60
80 100 120
-20
0
20 40
60
80 100 120
Temp (
)
℃
Temp (
)
℃
6/7
Advanced Power
Electronics Corp.
APE1801
PWM Control 2A Step-Down Converter
Typical Characteristics
Output Ripple
Power on test wave
(VIN=12V, VOUT=5V, IOUT=2A)
(VIN=12V, VOUT=5V, IOUT=2A )
VOUT
VOUT(AC)
V
IN
SW
SW
ISW
ISW
Load Transient Response
EN PIN on test wave
(VIN=12V, VOUT=5V, IOUT=0.1~2A)
(VIN=12V, VOUT=5V, IOUT=2A )
VOUT
VOUT
SW
V
OUT(AC)
SW
V
IN
ISW
ISW
Efficiency
Efficiency
(VIN=12V, VOUT=5V/3.3V)
(VIN=5V, VOUT=3.3V/2.5V)
VIN=5V
VIN=12V
100%
100%
90%
80%
70%
60%
50%
40%
30%
20%
10%
0%
90%
80%
70%
60%
50%
40%
30%
Vout=5V
Vout=2.5V
VIN=3.3V
20%
Vout=3.3V
10%
0%
0.0
0.5
1.0
1.5
2.0
0.0
0.5
1.0
1.5
2.0
Iout(A)
Iout (A)
7/7
ADVANCED POWER ELECTRONICS CORP.
Package Outline : SOP-8L
D
Millimeters
SYMBOLS
MIN NOM MAX
1.35 1.55 1.75
0.10 0.18 0.25
0.33 0.41 0.51
0.19 0.22 0.25
4.80 4.90 5.00
3.80 3.90 4.00
5.80 6.15 6.50
0.38 0.71 1.27
A
A1
B
8
7
6
3
5
4
E
C
E1
D
E1
E
1
2
L
θ
0
4.00 8.00
1.27 TYP
e
e
B
A
A1
DETAIL A
θ
L
1.All Dimension Are In Millimeters.
2.Dimension Does Not Include Mold Protrusions.
c
DETAIL A
Part Marking Information & Packing : SOP-8L
Part Number
Package Code
1801M
YWWSSS
Date Code (YWWSSS)
Y：Last Digit Of The Year
WW：Week
SSS：Sequence
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