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PDF AX3811A Data sheet ( Hoja de datos )
| Número de pieza | AX3811A | |
| Descripción | Synchronous Step-Down Regulator | |
| Fabricantes | AXElite | |
| Logotipo |  |
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AX3811A
High Efficiency Fast Response, 2A, 18V Input
Synchronous Step-Down Regulator
GENERAL DESCRIPTION
AX3811A develops high efficiency synchronous stepdown DC-DC converter capable of
delivering 2A load current. AX3811A operates over a wide input voltage range from 4.35V to
18V and integrates main switch and synchronous switch with very low RDS(ON) to minimize the
conduction loss.
AX3811A adopts the instant PWM architecture to achieve fast transient responses for
high step down applications and high efficiency at light loads. In addition, it operates at
pseudo-constant frequency of 500 kHz under heavy load conditions to minimize the size of
inductor and capacitor.
FEATURES
- Low RDS(ON) for internal switches (top/bottom):140/130 mΩ
- 4.35-18V input voltage range
- 2A load current capability
- Instant PWM architecture to achieve fast transient responses Internal softstart limits the
inrush current
- 2% 0.6V reference
- RoHS Compliant and Halogen Free
- Compact package: SOT23-6
Applications
- Set Top Box
- Portable TV
- Access Point Router
- DSL Modem
- LCD TV
1/10
Axelite Confidential Materials, do not copy or distribute without written consent.
Rev.1.2 Nov.04, 2013
1 page  
AX3811A
TYPICAL CHARACTERISTICS
100
95
90
85
80
75
70
65
60
10
Efficiency vs. Load Current
7VIN,5VOUT
12VIN,5VOUT
16VIN,5VOUT
100 1000
Load Current (mA)
10000
100
90
80
70
60
50
40
10
Efficiency vs. Load Current
5VIN,1.2VOUT
12VIN,1.2VOUT
16VIN,1.2VOUT
100 1000
Load Current (mA)
10000
100
95
90
85
80
75
70
65
60
10
Efficiency vs. Load Current
7VIN,3.3VOUT
12VIN,3.3VOUT
16VIN,3.3VOUT
100 1000
Load Current (mA)
10000
Output Ripple
(VIN=12V, VOUT=3.3V, ILOAD=2A)
VOUT(AC) 10mV/div
VLX 10V/div
IL 2A/div
Time (1us/div)
Load Transient
(VIN=12V, VOUT=3.3V, ILOAD=0.2-1A)
VOUT(AC) 100mV/div
Load Transient
(VIN=12V, VOUT=3.3V, ILOAD=1-2A)
VOUT(AC) 100mV/div
IL 500mA/div
IL 1A/div
Time (40us/div)
Time (40us/div)
5/10
Axelite Confidential Materials, do not copy or distribute without written consent.
Rev.1.2 Nov.04, 2013
5 Page | ||
| Páginas | Total 10 Páginas | |
| PDF Descargar | [ Datasheet AX3811A.PDF ] | |
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