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AX5301 の電気的特性と機能

AX5301のメーカーはAXEliteです、この部品の機能は「PWM Step-up Controller」です。


製品の詳細 ( Datasheet PDF )

部品番号 AX5301
部品説明 PWM Step-up Controller
メーカ AXElite
ロゴ AXElite ロゴ 




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AX5301 Datasheet, AX5301 PDF,ピン配置, 機能
AX5301 (Preliminary)
PWM Step-up Controller
™ GENERAL DESCRIPTION
The AX5301 is high efficient PWM step-up controller. Designed to drive an external
N-channel MOSFET, Output voltage is programmable with 1.0V of standard voltage
supply internal, and using externally connected components, output voltage (FB) can be
set up at will.
The AX5301 can be operated at switching frequencies of 500kHz allowing for easy
filtering and low noise, the size of the external components can be reduced.
This controller also contains an error amplifier circuit as well as a soft-start circuit
that prevents inrush-current at startup. An enable function and thermal shutdown
functions are built inside.
™ FEATURES
- Input voltage: 3.0V to 24V
- Output voltage: Define by N-channel MOS.
- Duty ratio: 0% to 80% PWM control
- Oscillation frequency: 500KHz (±20%) .
- Enable function
- Soft-Start function
- Thermal Shutdown function
- External SW N-channel MOS.
- MSOP-8L & SOP-8L Pb-Free Package.
1/10
Axelite Confidential Materials, do not copy or distribute without written consent.
Rev.0.1 Jun.30, 2006

1 Page





AX5301 pdf, ピン配列
AX5301 (Preliminary)
™ Absolute Maximum Ratings (at Ta=25)
Characteristics
Symbol
Rating
PVCC/VCC Pin Voltage
Feedback Pin Voltage
EN Voltage
Gate Pin Voltage
Power Dissipation
VCC
VFB
VEN
VGATE
PD
VSS - 0.3 to VSS + 26
VSS - 0.3 to 12
VSS - 0.3 to VCC
VSS - 0.3 to VCC
Internally limited
Storage Temperature Range
TST -40 to +150
Operating Temperature Range
TOP -20 to +125
Operating Supply Voltage
VOP +3 to +24
Thermal Resistance from Junction to case
θJC SOP8=40, MSOP8=45
Thermal Resistance from Junction to ambient θJA SOP8=120, MSOP8=200
Note : θJA is measured with the PCB copper area of approximately 1 in2 (Multi-layer).
Unit
V
V
V
V
mW
V
/W
/W
™ Electrical Characteristics (VIN = 6V, VOUT=12V, Ta=25, unless otherwise specified)
Characteristics
Feedback Voltage
Quiescent Current
Feedback Bias Current
Shutdown Supply Current
Oscillation Frequency
EN Pin Logic input
threshold voltage
EN Pin Input Current
Soft-Start Time
LX Rise Time
LX Fall Time
Efficiency
Maximum Duty Cycle
Minimum Duty Cycle
Thermal shutdown Temp
Symbol
VFB
ICCQ
IFB
ISD
FOSC
VSH
VSL
ISH
ISL
TSS
TLXR
TLXF
EFFI
DCMAX
DCMIN
TSD
Conditions
IOUT=0.1A
VFB=1.5V force driver off
IOUT=0.1A
VEN =0V
SW pin(AX5301)
High (regulator ON)
Low (regulator OFF)
VEN=2.5V (ON)
VEN=0.3V (OFF)
CLX=1000pF
CLX=1000pF
VCC = 6V,
VOUT = 12V
VFB=0.4V
Isw = 2A
Isw = 3A
VFB=1.2V
Min
0.975
-
-
400
2.0
-
-
-
0.3
-
-
-
Typ
1.000
4
0.1
2
500
-
-
20
-10
4
80
80
93
92
Max Units
1.025 V
6 mA
0.5 uA
10 uA
600 KHz
-V
0.8
- uA
- uA
8 ms
-
-
nS
-%
- 80 -
%
- 0-
135
3/10
Axelite Confidential Materials, do not copy or distribute without written consent.
Rev.0.1 Dec.21, 2006


3Pages


AX5301 電子部品, 半導体
AX5301 (Preliminary)
Input Capacitor Selection
The input capacitor reduces the surge current drawn from the input and switching
noise from the device. The input capacitor impedance at the switching frequency shall
be less than input source impedance to prevent high frequency switching current
passing to the input. A low ESR input capacitor sized for maximum RMS current must
be used.
The capacitor voltage rating should be at least 1.5 times greater than the input
voltage, and often much higher voltage ratings are needed to satisfy.
Output Capacitor Selection
The output capacitor is required to keep the output voltage ripple small and to
ensure regulation loop stability. The output capacitor must have low impedance at the
switching frequency. A low ESR capacitor sized for maximum RMS current must be
used. the low ESR requirements needed for low output ripple voltage.
The capacitor voltage rating should be at least 1.5 times greater than the input
voltage, and often much higher voltage ratings are needed to satisfy.
The output capacitor need use 470uF*2 at switch current more than 1.5A.
Output Voltage Ripple
Application circuit item shows the basic application circuit with AX5101A. The
output voltage ripple (VRIPPLE) very lager at high switch current(ISW=3A, VRIPPLE
0.7V), external π filters can reduce output voltage ripple or add MLCC 22uF at
output.
a. π filters
VCC=6V
L1
15uH
D1
B340A
L2
2.2uH
Vout=+12V
C3
470uF
C4
0.1uF
R4
100K
C8
option
U5
1 SGND
2 CE
3 Vcc
4 FB
AX5101A
PGND
PGND
SW
SW
8
7
6
5
R1
22K
C5 C6
680uF 0.22u
R2
2K
C10 C9
470uF 0.1u
6/10
Axelite Confidential Materials, do not copy or distribute without written consent.
Rev.0.1 Dec.21, 2006

6 Page



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