APL5338 Datasheet, PDF (1/19 Pages) Anpec Electronics Coropration – 2A Bus Termination Regulator

APL5338
2A Bus Termination Regulator
Features
General Description
• Sourcing and Sinking Current up to 2A
The APL5338 linear regulator is designed to provide a
• Wide Input Voltage Range: 1.2V to 3.6V
regulated voltage with bi-directional output current for
•
DDR-SDRAM termination. The APL5338 integrates two
VTT and VTTREF Voltage Tracks at Half the VREF
power transistors to source or sink current up to 2A. It
Voltage
also incorporates current-limit and thermal shutdown into
• VTT and VTTREF Voltage with ±10mV Accuracy _{a single chip.}
• Excellent Load Transient Response
The output voltage of APL5338 tracks the voltage at VREF
• Stable with 10µF Ceramic Output Capacitor
pin. An internal resistor divider is used to provide a half
• Current-Limit Protection
• Thermal Shutdown Protection
• Power-On-Reset Function on VCNTL
• S3, S5 Input Signals for ACPI States
voltage of VREF for VTTREF and VTT Voltage. The VTT
output voltage is only requiring 10µF of ceramic output
capacitance for stability and fast transient response. The
S3 and S5 pins provide the sleep state for VTT (S3 state)
and suspend state (S4/S5 state) for device when S5 and
• Small MSOP-10P and TDFN3x3-10 Packages
S3 are both pulled low the device provides the soft-off for
• Lead Free and Green Devices Available
(RoHS Compliant)
VTT and VTTREF. The MSOP-10P and TDFN3x3-10 pack-
age with a copper pad is available which provides excel-
lent thermal impedance.
Applications
• DDR 2/3 Memory Termination
Simplified Application Circuit
C_IN
10µF
C_OUT
10µF
APL5338
1 _VREF
10
VCNTL
2 _VIN
S5 ⁹
3
VTT
GND ⁸
4
PGND
S3 ⁷
5 _{VTTSNS VTTREF} 6
C1
0.1µF
Pin Configuration
VREF 1
VIN 2
VTT 3
PGND 4
VTTSEN 5
10 VCNTL
9 S5
8 GND
7 S3
6 VTTREF
MSOP-10P (Top View)
VREF 1
VIN 2
VTT 3
PGND 4
VTTSEN 5
GND
10 VCNTL
9 S5
8 GND
7 S3
6 VTTREF
TDFN3X3-10
(Top View)
= Exposed Pad
(connected to ground plane for better heat dissipation)
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.
Copyright © ANPEC Electronics Corp.
1
Rev. A.5 - Aug., 2013
www.anpec.com.tw