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PDF AP1513 Data sheet ( Hoja de datos )
| Número de pieza | AP1513 | |
| Descripción | PWM CONTROL 2A STEP-DOWN CONVERTER | |
| Fabricantes | Diodes Incorporated | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de AP1513 (archivo pdf) en la parte inferior de esta página. Total 9 Páginas | ||
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AP1513
PWM CONTROL 2A STEP-DOWN CONVERTER
Features
• Input voltage: 3.6V to 18V
• Output voltage: 0.8V to VCC
• Duty ratio: 0% to 100% PWM control
• Oscillation frequency: 300KHz typ.
• Soft-start, Current limit, Enable function
• Thermal Shutdown function
• Built-in internal SW P-channel MOS
• SOP-8L: Available in “Green” Molding Compound
(No Br, Sb)
• Lead Free Finish/ RoHS Compliant (Note 1)
Applications
• PC Motherboard
• LCD Monitor
• Graphic Card
• DVD-Video Player
• Telecom Equipment
• ADSL Modem
• Printer and other Peripheral Equipment
• Microprocessor core supply
• Networking power supply
Typical Application Circuit
General Description
AP1513 consists of step-down switching regulator with PWM
control. These devices include a reference voltage source,
oscillation circuit, error amplifier, and internal PMOS.
AP1513 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 a short circuit protect function are built
inside, and when OCP or SCP happens, the operation frequency
will be reduced from 300KHz to 30KHz. 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 mini-package, providing such outstanding features as
low current consumption. Since this converter can accommodate
an input voltage up to 18V, it is also suitable for the operation via
an AC adapter.
VIN Vcc Output
CIN
470uF
R OCSET COCSET
3K Option
C Vcc
0.1uF
REN
100K
CEN
0.1uF
AP1513
OCSET
FB
EN VSS
L1
33uH
CC
Optional
D1
SBR2U30P1
VOUT= 5V/2A
RA
6.8K
+C +
-
RB
1.3K
0.1uF-
COUT
470uF
VOUT
L1 Value
Note: VOUT = VFB x (1+RA/RB)
RB =0.7K~5K ohm
VIN = 12V, IMAX = 2A
2.5V
3.3V
22uH
27uH
5V
33uH
AP1513 Rev. 4
DS31053
1 of 9
www.diodes.com
JULY 2009
© Diodes Incorporated
1 page  
AP1513
PWM CONTROL 2A STEP-DOWN CONVERTER
Typical Performance Characteristics
350
345
340
335
330
325
320
315
310
0
AP1513 Vin vs. Frequency
(Vout=3.3V; Iout=0.2A)
2 4 6 8 10 12 14 16 18 20
Vin (V)
AP1513 Line Regulation
(Vout=3.3V; Iout=0.2A)
3.40
3.35
3.30
3.25
3.20
3.15
3.10
0 2 4 6 8 10 12 14 16 18 20
Vin (V)
0.84
0.83
0.82
0.81
0.80
0.79
0.78
0.77
0.76
0.75
0.74
0
AP1513 Vin vs. FB
(Vout=3.3V; Iout=0.2A)
2 4 6 8 10 12 14 16 18 20
Vin (V)
AP1513 Load Regulation
5.10 (Vin=12V)
5.09
5.08
5.07
5.06
5.05
5.04
5.03
5.02
5.01
5.00
0.0 0.5 1.0 1.5 2.0
Iout (A)
2.5
100
90
80
70
60
50
40
30
20
10
0
0.0
AP1513 Efficiency
Vout:5.0V
Vout:3.3V
0.5 1.0 1.5
Iout (A)
2.0
AP1513 Rev. 4
DS31053
5 of 9
www.diodes.com
JULY 2009
© Diodes Incorporated
5 Page | ||
| Páginas | Total 9 Páginas | |
| PDF Descargar | [ Datasheet AP1513.PDF ] | |
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