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參數(shù)資料
| 型號： | APL5331 |
| 廠商： | Anpec Electronics Corporation |
| 英文描述： | 3A Bus Termination Regulator |
| 中文描述： | 3A條總線終端穩(wěn)壓器 |
| 文件頁數(shù)： | 1/20頁 |
| 文件大小： | 230K |
| 代理商： | APL5331 |
3A Bus Termination Regulator
Copyright
ANPEC Electronics Corp.
Rev. A.8 - Oct., 2003
APL5331
www.anpec.com.tw
1
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.
Provide Bi-direction Current
- Sourcing or Sinking Current up to 3A
1.25V/0.9V Output for DDR I/II Applications
Fast Transient Response
High Output Accuracy
- ±20mV over Load, VOUT Offset and
Temperature
Adjustable Output Voltage by External Resistors
Current-Limit Protection
On-Chip Thermal Shutdown
Shutdown for Standby or Suspend Mode
Simple SOP-8, SOP-8-P with thermal pad,
TO-252- 5 and TO-263-5 Packages
Features
General Description ( Cont.)
On-chip thermal shutdown provides protection against
any combination of overload that would create ex-
cessive junction temperature. The output voltage of
APL5331 track the voltage at VREF pin. A resistor
divider connected to VIN, GND and VREF pins is
used to provide a half voltage of VIN to VREF pin. In
addition, an external ceramic capacitor and an open-
drain transistor connected to VREF pin provides soft-
start and shutdown control respectively. Pulling and
holding the VREF to GND shuts off the output. The
output of APL5331 will be high impedance after be-
ing shut down by VREF or thermal shutdown function.
Applications
DDR I/II SDRAM Termination
SSTL-2/3 Termination Voltage
Applications Requiring the Regulator with
Bi-direction 3A Current Capability
Pin Config uration
TO-252-5 (Top View)
VOUT
VREF
VCNTL
GND
VIN
1
2
3
4
5
TAB is VCNTL
TO-263-5 (Top
View)
VIN
GND
VCNTL
VREF
VOUT
1
2
3
4
5
TAB is VCNTL
VCNTL
SOP-8 (Top View)
1
2
3
4
5
6
7
8
VIN
GND
VREF
VOUT
VCNTL
VCNTL
VCNTL
VCNTL
General Description
The APL5331 linear regulator is designed to provide
a regulated voltage with bi-directional output current
for DDR-SDRAM termination. The APL5331 integrates
two power transistors to source or sink current up to
3A. It also incorporate current-limit, thermal shut-
down and shutdown control functions into a single
chip. Current-limit circuit limits the short-circuit
current.
1
2
3
4
5
6
7
8
VIN
GND
VREF
VOUT
NC
NC
NC
SOP-8-P (Top View)
= Thermal Pad
(connected to GND plane for better heat
dissipation)
NC = No internal connection
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