http://www.datasheet4u.com

900,000+ Datasheet PDF Search and Download

Datasheet4U offers most rated semiconductors datasheets pdf




Diodes Semiconductor Electronic Components Datasheet

AP3503 Datasheet

3A Synchronous DC-DC Buck Converter

No Preview Available !

AP3503 pdf
Data Sheet
340kHz, 3A Synchronous DC-DC Buck Converter
AP3503
General Description
The AP3503 is a 340kHz fixed frequency, current
mode, PWM synchronous buck (step-down) DC-DC
converter, capable of driving a 3A load with high
efficiency, excellent line and load regulation. The
device integrates N-channel power MOSFET
switches with low on-resistance. Current mode
control provides fast transient response and
cycle-by-cycle current limit.
The AP3503 employs complete protection to ensure
system security. Including output Over Voltage
Protection, input Under Voltage LockOut,
programmable soft-start, Over Temperature
Protection to safeguard the circuit.
This IC is available in PSOP-8 package.
Features
• Input Voltage Range: 4.5V to 18V
• Fixed 340kHz Frequency
• High Efficiency: up to 95%
• Output Current: 3A
• Current Mode Control
• Built-in Over Current Protection
• Built-in Thermal Shutdown Function
• Built-in UVLO Function
• Built-in Over Voltage Protection
• Programmable Soft-start
Applications
• LCD TV
• Set Top Box
• Portable DVD
• Digital Photo Frame
PSOP-8
Figure 1. Package Type of AP3503
May. 2012 Rev. 1. 7
BCD Semiconductor Manufacturing Limited
1


Diodes Semiconductor Electronic Components Datasheet

AP3503 Datasheet

3A Synchronous DC-DC Buck Converter

No Preview Available !

AP3503 pdf
340kHz, 3A Synchronous DC-DC Buck Converter
Pin Configuration
MP Package
(PSOP-8)
Data Sheet
AP3503
18
27
36
45
Pin Description
Figure 2. Pin Configuration of AP3503 (Top View)
Pin Number
1
2
3
4
5
6
7
8
Pin Name
BS
IN
SW
GND
FB
COMP
EN
SS
EP
Function
Bootstrap pin. A bootstrap capacitor is connected between the BS pin
and SW pin. The voltage across the bootstrap capacitor drives the
internal high-side power MOSFET
Supply power input pin. A capacitor should be connected between the
IN pin and GND pin to keep the input voltage constant
Power switch output pin. This pin is connected to the inductor and
bootstrap capacitor
Ground pin
Feedback pin. This pin is connected to an external resistor divider to
program the system output voltage. When the FB pin voltage exceeds
1.1V, the over voltage protection is triggered. When the FB pin
voltage is below 0.3V, the oscillator frequency is lowered to realize
short circuit protection
Compensation pin. This pin is the output of the transconductance
error amplifier and the input to the current comparator. It is used to
compensate the control loop. Connect a series RC network from this
pin to GND. In some cases, an additional capacitor from this pin to
GND pin is required
Control input pin. EN is a digital input that turns the regulator on or
off. Drive EN high/low to turn on/off the regulator. Pull up with
100kresistor for automatic startup
Soft-start control input pin. SS controls the soft-start period. Connect
a capacitor from SS to GND to set the soft-start period. A 0.1µF
capacitor sets the soft-start period to 15ms. To disable the soft-start
feature, leave SS unconnected
Exposed pad. It should be connected to GND in PCB layout
May. 2012 Rev. 1. 7
BCD Semiconductor Manufacturing Limited
2


Part Number AP3503
Description 3A Synchronous DC-DC Buck Converter
Maker BCD
Total Page 11 Pages
PDF Download
AP3503 pdf
Download PDF File
[partsNo] view html
View PDF for Mobile






Related Datasheet

1 AP3502 2A Synchronous DC-DC Buck Converter BCD
BCD
AP3502 pdf
2 AP3502E 2A Synchronous DC-DC Buck Converter BCD
BCD
AP3502E pdf
3 AP3502F 2A Synchronous DC-DC Buck Converter BCD
BCD
AP3502F pdf
4 AP3503 3A Synchronous DC-DC Buck Converter BCD
BCD
AP3503 pdf
5 AP3503E 3A Synchronous DC-DC Buck Converter BCD
BCD
AP3503E pdf
6 AP3503F 3A Synchronous DC-DC Buck Converter BCD
BCD
AP3503F pdf
7 AP3509 100 to 3500 Mhz TO-8 Cascadable Amplifier Cougar Components
Cougar Components
AP3509 pdf
8 AP350X Traditional Aerospace Contactor TE
TE
AP350X pdf
9 AP350XB57 Traditional Aerospace Contactor TE
TE
AP350XB57 pdf






Part Number Start With

0    1    2    3    4    5    6    7    8    9    A    B    C    D    E    F    G    H    I    J    K    L    M    N    O    P    Q    R    S    T    U    V    W    X    Y    Z

site map

webmaste! click here

contact us

Buy Components