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PDF APW7337 Data sheet ( Hoja de datos )
| Número de pieza | APW7337 | |
| Descripción | 3A 24V 340kHz synchronous Buck Converter | |
| Fabricantes | ANPEC | |
| Logotipo |  |
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APW7337
3A 24V 340kHz synchronous Buck Converter
Features
General Description
• Wide Input Voltage from 4.5V to 24V
APW7337 is a 3A synchronous buck converter with inte-
• 3A Continuous Output Current
grated 85mΩ power MOSFETs. The APW7337 design
• Adjustable Output Voltage from 0.8V to 20V
with a current-mode control scheme, can convert wide
• Intergrated High/Low Side MOSFET
input voltage of 4.5V to 24V to the output voltage adjust-
• PFM/PWM mode Operation
• Fixed 340kHz Switching Frequency
able from 0.8V to 20V to provide excellent output voltage
regulation.
The APW7337 is equipped with an automatic PFM/PWM
• Stable with Low ESR Ceramic Output Capacitors mode operation. At light load, the IC operates in the PFM
• Power-On-Reset Detection
mode to reduce the switching losses. At heavy load, the
• Programmable Soft-Start
IC works in PWM.
• Over-Temperature Protection
The APW7337 is also equipped with Power-on-reset, soft-
• Current-Limit Protection with Frequency Foldback start, and whole protections (over-temperature, and cur-
• Enable/Shutdown Function
rent-limit) into a single package.
• Small TDFN3x3-10 Package
• Lead Free and Green Devices Available
This device, available TDFN3x3-10, provides a very com-
pact system solution external components and PCB area.
(RoHS Compliant)
Applications
Pin Configuration
• LCD Monitor/TV
• Set-Top Box
• DSL, Switch HUB
• Notebook Computer
APW7337
Simplified Application Circuit
VIN
TDFN3x3-10
(Top View)
11 Exposed Pad
The pin 7 and 8 must be connected to the pin 11 (Exposed Pad)
APW7337
VOUT
ANPEC reserves the right to make changes to improve reliability or manufacturability without notice, and
advise customers to obtain the latest version of relevant information to verify before placing orders.
Copyright © ANPEC Electronics Corp.
Rev. A.2 - Jul., 2013
1
www.anpec.com.tw
1 page  
APW7337
Typical Operating Characteristics
Efficiency vs. Output Current
Efficiency vs. Output Current
VIN = 19V
VIN = 12V
VOUT = 5V
0.001
0.01
0.1
1
10
Output Current (A)
VIN Supply Current vs. VIN Supply
Voltage
1.90
TA=25oC
1.85
1.80
1.75
1.70
1.65
5
10 15
20 25
VIN Supply Voltage (V)
EN UVLO Threshold Voltage vs.
VIN Supply Voltage
TA=25oC
VEN Rising
VEN Falling
5 10 15 20
VIN Supply Voltage (V)
Copyright © ANPEC Electronics Corp.
Rev. A.2 - Jul., 2013
25
5
VOUT = 1.2V
VOUT = 1.8V
VOUT = 2.5V
VOUT = 3.3V
VIN = 12V
0.001
0.01
0.1
1
10
Output Current (A)
Soft Start Time vs. SS pin to GND
Capacitance
VIN =12V VOUT =3.3V, TA=25oC
The time of 10%~90%VOUT
SS pin to GND Capacitance (nF)
Reference Voltage vs. VIN Supply
Voltage
5 10 15 20 25
VIN Supply Voltage (V)
www.anpec.com.tw
5 Page 
APW7337
Typical Application Circuit
VIN
4.5V~24V
C1
10µF
R4
100k
C5
0.1µF
C2
(option*)
4,5
VIN
1
EN
3
BS
LX 6
2 APW7337
SS
10
COMP
FB
GND
R3
6.8k 7,8
9
C6
3.9nF
C3
10nF
L1
10µH
R1
24K
R2
7.5K
VOUT
3.3V/3A
C4
22µFx2
* For cirtical condition, like plug in, the large capacitace and high voltage rating are needed to avoid the high spike
voltage.
Recommended Feedback Compensation Value
Vin(V)
24
12
12
12
VOUT(V)
5
5
3.3
2.5
L1(µH)
10
10
10
10
C2(µF)
22(Ceremic)
44 (Ceremic)
22 (Ceremic)
22 (Ceremic)
R1(KΩ)
36
36
24
12
R2(KΩ)
6.8
6.8
7.5
5.6
R3(KΩ)
6.8
5
6.8
6.8
C5(nF)
3.9
1.5
3.9
3.9
Copyright © ANPEC Electronics Corp.
Rev. A.2 - Jul., 2013
11
www.anpec.com.tw
11 Page | ||
| Páginas | Total 20 Páginas | |
| PDF Descargar | [ Datasheet APW7337.PDF ] | |
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