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PDF AX6617 Data sheet ( Hoja de datos )
| Número de pieza | AX6617 | |
| Descripción | 3A Ultra Low Dropout Linear Regulator | |
| Fabricantes | AXElite | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de AX6617 (archivo pdf) en la parte inferior de esta página. Total 12 Páginas | ||
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AX6617
3A Ultra Low Dropout Linear Regulator
GENERAL DESCRIPTION
The AX6617 series is a 3A ultra low dropout linear regulator. This product is
specifically designed to provide well supply voltage for front-side-bus termination on
motherboards and NB applications. The IC needs two supply voltages, a control voltage for
the circuitry and a main supply voltage for power conversion, to reduce power dissipation
and provide extremely low dropout. The AX6617 series integrates many functions. A
Power-On-Reset (POR) circuit monitors both supply voltages to prevent wrong operations.
A thermal shutdown and current limit functions protect the device against thermal and
current over-loads. A POK indicates the output status with time delay which is set internally.
It can control other converter for power sequence. The AX6617 series can be enabled by
other power system. Pulling and holding the EN pin below 0.6V shuts off the output.
The AX6617 series is available in SOP-8L-EP package which features small size as
SOP-8L and an Exposed Pad to reduce the junction-to-case resistance, being applicable in
2~3W applications.
FEATURES
- Ultra Low Dropout 0.23V(typical) @ 2A Output Current for 1.2V output Voltage
- Low ESR Output Capacitor (Multi-layer Chip Capacitors (MLCC)) Applicable
- EN internal pull-low for AX6617A
EN internal pull-high for AX6617B
- Fast Transient Response
- Adjustable Output Voltage by External Resistors
- Power-On-Reset Monitoring on Both VCNTL and VIN Pins
- Internal Soft-Start
- Under-Voltage Protection
- Current-Limit and Thermal Shutdown Protection
- Power-OK Output with a Delay Time
- SOP-8L with Exposed Pad Pb-Free Package.
1/12
Axelite Confidential Materials, do not copy or distribute without written consent.
Rev.1.6 Dec.28, 2011
1 page  
AX6617
ELECTRICAL CHARACTERISTICS (CONTINUOUS)
Characteristics
Symbol
Conditions
POK Threshold Voltage for
Power OK
VPOK VFB Rising
POK Threshold Voltage for
Power Not OK
VPNOK VFB Falling
POK Low Voltage
POK sinks 5mA
POK Delay Time
Thermal shutdown Temp
Thermal Shutdown
Hysteresis
TDELAY
TSD
TSH
APPLICATION CIRCUIT
1. Using an Aluminum Electrolytic Output Capacitor
Min Typ Max Units
- 92% - VFB
- 81% -
- 0.25 0.4
0.8 2 10
- 160 -
- 40 -
VFB
V
mS
°C
°C
VCNTL=5V
ON
C1 OFF
1uF
R3
U1
4 VCNTL
10K
VIN 3
1 POK
2 EN
5
NC
VOUT 6
8 GND
FB 7
AX6617
C2 C3
100uF 0.1uF
VIN=1.8V
VOUT=1.2V/2A
R1 C6
1K
12~48nF
(Option)
C4
C5
220uF 0.1uF
R2
2K
2. Using an MLCC Output Capacitor
VCNTL=5V
C1
1uF
ON
OFF
R3
10K
U2
4 VCNTL
VIN 3
1 POK
2 EN
NC 5
VOUT 6
8 GND
FB 7
AX6617
C3
4.7uF
VIN=1.8V
VOUT=1.2V/2A
R1 C6 C5
39K
56pF
10uF
(Option)
R2
78K
VOUT=VFB*(1+R1/R2)
VFB = 0.8V
5/12
Axelite Confidential Materials, do not copy or distribute without written consent.
Rev.1.6 Dec.28, 2011
5 Page 
AX6617
TYPICAL CHARACTERISTICS (CONTINUOUS)
VIN Power –ON
Enable –ON with POK Delay
11/12
Axelite Confidential Materials, do not copy or distribute without written consent.
Rev.1.6 Dec.28, 2011
11 Page | ||
| Páginas | Total 12 Páginas | |
| PDF Descargar | [ Datasheet AX6617.PDF ] | |
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