中文
EnglishThe APL5331 linear regulator is designed to provide a regulated voltage with bi-directional output current for DDR-SDRAM termination voltage.
Features
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-8P with thermal pad,
TO-252-5 and TO-263-5 Packages
Lead Free and Green Devices Available
(RoHS Compliant)
General Description
The APL5331 linear regulator is designed to provide a
regulated voltage with bi-directional output current for
DDR-SDRAM termination voltage. The APL5331 inte-
grates two power transistors to source or sink current
up to 3A. It also incorporates current-limit, thermal shut-
down and shutdown control functions into a single chip.
The current-limit circuit limits the short-circuit current.
The on-chip thermal shutdown provides protection
against any combination of overload that would create
excessive junction temperature. The output voltage of
APL5331 tracks the voltage at VREF pin. A resistor di-
vider 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 tran-
sistor connected to VREF pin provide soft-start and shut-
Applications
down control respectively. Pulling and holding the VREF
voltage to 0V shuts off the output. The output of the
相关文件
Part_No | Package & Pins | Input Voltage (V) | VCNTL Voltage (V) | Quiescent Current (typ)(uA) | Output Sink Current (max)(A) | Output Source Current (max)(A) | DDR Power | VTTREF | S3/S5 | ||
min | max | min | max | ||||||||
APL5331 | SOP-8 | 1.2 | 3.5 | 3.1 | 6 | 3900 | 3 | 3 | DDR1 | N | N |
APL5333 | MSOP-10 | 1.2 | 3.6 | 4.5 | 5.5 | 2000 | 3 | 3 | DDR1 | Y | Y |
APL5338 | MSOP-10 | 1.2 | 3.6 | 4.5 | 5.5 | 600 | 2 | 2 | DDR2 | Y | Y |
APL5338A | MSOP-10 | 1.2 | 3.6 | 3.1 | 5.5 | 600 | 2 | 2 | DDR2 | Y | Y |
APL5337 | SOP-8 | 1.1 | 4.5 | 3 | 5.5 | 1000 | 2 | 2 | DDR2 | N | N |
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