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PDF ACE150x Data sheet ( Hoja de datos )
| Número de pieza | ACE150x | |
| Descripción | PWM Step-Down DC/DC Converter | |
| Fabricantes | ACE Technology | |
| Logotipo |  |
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ACE150X
Technology 150KHz,2A, PWM Step-Down DC/DC Converter
Description
The ACE150x series are monolithic IC designed for a step-down DC/DC converter, and own the ability of
driving 2A load without additional transistor. It saves board space.
The Internal compensation makes feedback control having good line and load regulation without
external design. 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. If current limit
function occurs and VFB is down below 0.5V, the switching frequency will be reduced.
The ACE150x series operate at a switching frequency of 150KHz. Other features include a guaranteed
+4% tolerance on output voltage under specified input voltage and output load conditions, and +15% on
the oscillator frequency. The output version included fixed 3.3V, 5V, 12V, and an adjustable type. The
chips are available in a standard 8-lead SOP-8 package..
Features
• Guaranteed 2A output current
• 3.3V, 5V, 12V and adjustable output versions
• Thermal shutdown and current limit protection
• Internal oscillator of 150kHz fixed frequency.
• Built-in TTL On/Off control
Application
• One Channel switching regulators
• LCD Monitors
• High-efficiency step-down regulator
Absolute Maximum Ratings
Parameter
Symbol
Max
Unit
Input supply voltage
ON/OFF Pin Input Voltage
Feedback Pin Voltage
Output Voltage to Ground
Power Dissipation
VCC
VSD
VFB
VOUT
PD
24
-0.3 to +18
-0.3 to +18
-1
Internally Limited
V
V
V
V
W
Thermal resistance junction to ambient
SOP-8
θJA
70 OC/W
Operating junction temperature
Storage temperature range
Operating temperature
TJ
TSTG
TOPR
150
- 60 to 150
-40 to +125
OC
OC
OC
Note : Exceeding these rating could cause damage to the device. All voltages are with respect to Ground. Currents are positive
into, negative out of the specified terminal.
www.DataSheet.in
VER 1.2 1
1 page  
ACE150X
Technology 150KHz,2A ,PWM Step-Down DC/DC Converter
Notes:
Thermal Considerations:
The SOP-8 package needs a heat sink under most conditions. The size of the heat sink depends on the input
voltage, the load current and ambient temperature. The ACE150X junction temperature rises above ambient
temperature for a 2A load and different input and output voltages. The data for these curves was taken with the
ACE150X(SOP-8 package) operating as a buck-switching regulator in an ambient temperature of 25℃ (still air).
These temperature increments are all approximate and are affected by many factors.
Higher ambient temperatures require more heat sinker. For the best thermal performance, wide copper traces and
generous amounts of printed circuit board copper should be used in the board layout. ( One exception is the
output(switch) pin, which should not have large areas of copper.) Large areas of copper provide the best transfer of
heat (lower thermal resistance) to the surrounding air, and moving air lowers the thermal resistance even further.
Package thermal resistance and junction temperature increments are affected by a lot of factors. Some of these
factors include board size, shape, thickness, position, location, and even board temperature. Other factors are, trace
width, total printed circuit copper area, copper thickness, single or double-sided, multi-layer board and the amount of
solder on the board. The effectiveness of the PC board to dissipate heat also depends on the size, Furthermore,
some of these components such as the catch diode will add heat to the PC board and the heat can vary as the
input voltage changes. For the inductor, depending on the physical size, type or core material and the DC resistance,
it could either act as a heat sink taking heat away from the board, or it could add heat to the board.
Application Data
3A Diode
VR(V) Surface Mount Through Hole
Scgittky
Schottky
1N5820
20 SK32
SR302
MBR320
1N5821
30 SK33
MBR330
31DQ03
1N5822
40
SK34
MBRS340
SR304
MBR340
31DQ04
SR305
50
SK35
MBRS360
MBR350
31DQ05
MUR320
3A Diode
Surface Mount Through Hole
Scgittky
Schottky
1N5823
SR502
MBR520
1N5824
50WQ03
SR503
SB530
50WQ04
1N5825
SR504
SB540
50WQ05
50WF10
SB550
50SQ080
HER601
MUR620
www.DataSheet.in
VER 1.2 5
5 Page 
ACE150X
Technology 150KHz,2A ,PWM Step-Down DC/DC Converter
Frequency vs. Temperature,
(Vin=5V, Vout=15V)
Feedback Voltage vs. Temperature
(Vin=5V,Vout=15V)
Supply Current vs. Temperature
(Vin=5V, Vout=15V ; Iout=0V)
Supply Current vs. Supply Voltage
(Vout=15V;Iout=0A)
Efficiency vs. Output Current
(Vin=5V, Vout=15V)
Efficiency vs. Output Current
(Vin=3.35V;Vout=15V)
www.DataSheet.in
VER 1.2 11
11 Page | ||
| Páginas | Total 13 Páginas | |
| PDF Descargar | [ Datasheet ACE150x.PDF ] | |
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