|
|
PDF AX3701 Data sheet ( Hoja de datos )
| Número de pieza | AX3701 | |
| Descripción | VFB=0.6V Synchronous Step-Down Converter | |
| Fabricantes | AXElite | |
| Logotipo |  |
|
Hay una vista previa y un enlace de descarga de AX3701 (archivo pdf) en la parte inferior de esta página. Total 14 Páginas | ||
|
No Preview Available !
AX3701
1.4MHz, 1.2A, VFB=0.6V Synchronous Step-Down
Converter
GENERAL DESCRIPTION
AX3701 is a high efficiency monolithic synchronous buck regulator using a constant
frequency, current mode architecture. The device is available in an adjustable version.
Supply current with no load is about 200uA and drops to <1uA in shutdown. The 2.5V to
7.5V input voltage range makes AX3701 ideally suited for single Li-Ion, two to four AA
battery-powered applications. 100% duty cycle provides low dropout operation, extending
battery life in portable systems. Pulse skipping mode operation provides very low output
ripple voltage for noise sensitive applications. Switching frequency is internally set at
1.4MHz, allowing the use of small surface mount inductors and capacitors. The internal
synchronous switch increases efficiency and decreases need of an external Schottky diode.
Low output voltages are easily supported with the 0.6V feedback reference voltage. AX3701
is available in small (T) SOT-23-5L, TDFN-6L (2*2) packages.
FEATURES
- 2.5V to 7.5V Input Voltage Range
- Output Voltage from 0.6V to VIN
- High Efficiency: Up to 92%
- 1.4MHz Constant Frequency Operation
- 1.2A Output Current
- Quiescent Current: 200uA (input < 4.2V)
- No Schottky Diode Required
- 100% Duty Cycle in Dropout
- 0.6V Reference Allows Low Output Voltages
- Current Mode Operation for Excellent Line and Load Transient Response
- Current limit, Enable function
- Short Circuit Protect (SCP)
- ≤ 1µA Shutdown Current
- (T)SOT-23-5L, TDFN-6L (2*2)
1/14
Axelite Confidential Materials, do not copy or distribute without written consent.
Rev1.0 Feb.14, 2014
1 page  
AX3701
ELECTRICAL CHARACTERISTICS
(VIN = VEN=3.6V, TA =25°C, unless otherwise specified) (Note)
Characteristics
Symbol
Conditions Min Typ Max Units
Input Voltage Range
VIN
2.5 - 7.5 V
Under Voltage Lock Out
threshold
VUVLO
VIN Rising
Hysteresis
2.1 2.2 2.3 V
100 110 120 mV
Feedback Voltage
VFB VFB=0.6V
0.5880 0.6000 0.6120 V
Feedback Bias Current
IFB VFB=0.65V
-30 - +30 nA
Quiescent Current
ICC VFB=1V
- 200 400 uA
Shutdown Supply Current
Switching Current Limit
Line Regulation
ISD VEN =0V
ILIMIT VIN=5V
△VOUT/VOUT VIN = 2.5V~5.5V
- 0.1 1 uA
1.8 A
- 0.04 0.4 %/V
Load Regulation
△VOUT/VOUT IOUT = 0.01 to 1.2A - 0.5 0.6 %
Oscillation Frequency
RDS(ON) of P-CH MOSFET
RDS(ON) of N-CH MOSFET
Efficiency
EN pin logic input threshold
voltage
FOSC
RDSON
RDSON
EFFI
VENL
VENH
SW pin
IOUT=1.0A
IOUT=1.0A
VIN=5V, VOUT=3.3V,
IOUT=0.5A
1.2
-
-
92
-
1.2
1.4 1.6 MHz
0.26 0.33 Ω
0.26 0.33 Ω
- -%
- 0.6
- -V
EN Pin Input Current
IEN
- ±0.1 ±1 uA
Soft-Start Interval
TSS
- 1.2 - ms
Note: 100% production test at +25°C. Specifications over the temperature range are guaranteed by design and
characterization.
APPLICATION CIRCUIT
VIN
C1
4.7uF
VIN
EN
GND
SW
FB
L1
2.2uH
R1
60kΩ
VOUT=1.8V
C3
330pF
(Option)
C2
10uF
R2
30kΩ
VOUT=0.6*(1+R1/R2)
5/14
Axelite Confidential Materials, do not copy or distribute without written consent.
Rev1.0 Feb.14, 2014
5 Page 
AX3701
TYPICAL CHARACTERISTICS (CONTINUOUS)
1A Load Switching Waveform,
5VIN to 1.8VOUT
150°C Thermal Shutdown,
5VIN to 1.8VOUT, 1A Load
IOUT vs Efficiency, VIN=5V
11/14
Axelite Confidential Materials, do not copy or distribute without written consent.
Rev1.0 Feb.14, 2014
11 Page | ||
| Páginas | Total 14 Páginas | |
| PDF Descargar | [ Datasheet AX3701.PDF ] | |
Hoja de datos destacado
| Número de pieza | Descripción | Fabricantes |
| AX3700 | VFB=0.6V Synchronous Step-Down Converter | AXElite |
| AX3701 | VFB=0.6V Synchronous Step-Down Converter | AXElite |
| AX3702 | VFB=0.6V Synchronous Step-Down Converter | AXElite |
| Número de pieza | Descripción | Fabricantes |
| SLA6805M | High Voltage 3 phase Motor Driver IC. |
 Sanken |
| SDC1742 | 12- and 14-Bit Hybrid Synchro / Resolver-to-Digital Converters. |
 Analog Devices |
|
DataSheet.es es una pagina web que funciona como un repositorio de manuales o hoja de datos de muchos de los productos más populares, |
| DataSheet.es | 2020 | Privacy Policy | Contacto | Buscar |