BUCK CONTROLLER. APW8829 Datasheet

APW8829 CONTROLLER. Datasheet pdf. Equivalent

Part APW8829
Description SYNCHRONOUS BUCK CONTROLLER
Feature APW8829 DDR TOTAL POWER SOLUTION SYNCHRONOUS BUCK CONTROLLER WITH 1.5A LDO Features General Descr.
Manufacture ANPEC
Datasheet
Download APW8829 Datasheet




APW8829
APW8829
DDR TOTAL POWER SOLUTION
SYNCHRONOUS BUCK CONTROLLER WITH 1.5A LDO
Features
General Description
Buck Controller (VDDQ)
High Input Voltages Range from 3V to 28V Input
Power
Provide 1.8V (DDR2), 1.5V (DDR3), 1.35V (DDR3L),
1.2V(DDR4) or Adjustable Output Voltage from 0.
5V to 2V.
- ±1% Accuracy Over-Temperature
Build in VREF Voltage 1.8V ±1% Accuracy over
Temperature
Integrated MOSFET Drivers
Integrated Bootstrap Forward P-CH MOSFET
Excellent Line and Load Transient Responses
PFM Mode for Increased Light Load Efficiency
Selectable 500kHz / 670kHz Switching
Frequencies
Integrated MOSFET Drivers and Bootstrap Diode
S3 and S5 Pins Control The Device in S0, S3, or
S4/S5 State
Power Good Monitoring
50% Under-Voltage Protection (UVP)
125% Over-Voltage Protection (OVP)
Adjustable Current-Limit Protection
- Using Sense Low-Side MOSFET RDS(ON)
QFN-20 3mmx3mm Package (QFN-20) and
QFN-16 3mmx3mm Thin Package (TQFN-16)
Lead Free Available (RoHS Compliant)
+1.5A LDO Section (VTT)
Souring or Sinking Current up to 1.5A
Fast Transient Response for Output Voltage
Output Ceramic Capacitors Support at Least
10µF MLCC
VTT and VTTREF Track at Half the VDDQSNS by
Internal Divider
±20mV Accuracy for VTT and VTTREF
Independent Over-Current-Limit (OCL)
Thermal Shutdown Protection
The APW8829 integrates a synchronous buck PWM con-
troller to generate VDDQ, a sourcing and sinking LDO
linear regulator to generate VTT. It provides a complete
power supply for DDR2, DDR3, DDR3L and DDR4
memory system. It offers the lowest total solution cost in
system where space is at a premium.
The APW8829 provides excellent transient response and
accurate DC voltage output in PFM Mode. In Pulse Fre-
quency Mode (PFM), the APW8829 provides very high ef-
ficiency over light to heavy loads with loading-modulated
switching frequencies.
The APW8829 is equipped with accurate current-limit,
output under-voltage, and output over-voltage protections.
A Power-On- Reset function monitors the voltage on VCC
prevents wrong operation during power on.
The LDO is designed to provide a regulated voltage with
bi-directional output current for DDR-SDRAM termination.
The device integrates two power transistors to source or
sink current up to 1.5A. It also incorporates current-limit
and thermal shutdown protection.
An internal resistor divider is used to provide a half volt-
age of VDDQSNS for VTTREF and VTT Voltage. The VTT
output voltage is only requiring 20µF 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
S3 are both pulled low the device provides the soft-off for
VTT and VTTREF.The APW 8829 is available in
3mmx3mm 20-pin QFN and 3mmx3mm 16-pin TQFN
packages.
Applications
DDR2, DDR3, DDR3L and DDR4 MemoryPower Sup-
plies
SSTL-2 SSTL-18 and HSTL Termination
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.
Rev. A.4 - Dec, 2015
1
www.anpec.com.tw



APW8829
APW8829
Simplified Application Circuit
VIN
+3V~28V
Q1
VDDQ LOUT
Q2
5V
VTT
VDDQ/2
ROC
PWM
DDR
LDO
VREF
REFIN
MODE
S3 S5
RMODE
RTOP
RGND
Ordering and Marking Information
APW8829
APW8829 QA :
APW
8829
XXXXX
Assembly Material
Handling Code
Temperature Range
Package Code
Package Code
QA : QFN-20 QB : TQFN-16
Temperature Range
I : -40 to 85 oC
Handling Code
TR : Tape & Reel TY : Tray
Assembly Material
G : Halogen and Lead Free Device
XXXXX - Date Code
APW8829 QB :
APW
8829
XXXXX
XXXXX - Date Code
Note: ANPEC lead-free products contain molding compounds/die attach materials and 100% matte tin plate termination finish; which
are fully compliant with RoHS. ANPEC lead-free products meet or exceed the lead-free requirements of IPC/JEDEC J-STD-020D for
MSL classification at lead-free peak reflow temperature. ANPEC defines Greento mean lead-free (RoHS compliant) and halogen
free (Br or Cl does not exceed 900ppm by weight in homogeneous material and total of Br and Cl does not exceed 1500ppm by
weight).
Copyright © ANPEC Electronics Corp.
Rev. A.4 - Dec, 2015
2
www.anpec.com.tw







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