|
|
PDF APW8819 Data sheet ( Hoja de datos )
| Número de pieza | APW8819 | |
| Descripción | DDR TOTAL POWER SOLUTION SYNCHRONOUS BUCK CONTROLLER | |
| Fabricantes | ANPEC | |
| Logotipo |  |
|
Hay una vista previa y un enlace de descarga de APW8819 (archivo pdf) en la parte inferior de esta página. Total 28 Páginas | ||
|
No Preview Available !
APW8819
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) 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 300kHz/400kHz/500kHz Switching
Frequebcies
• 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 APW8819 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 and DDR3 memory system. It
offers the lowest total solution cost in system where space
is at a premium.
The APW8819 provides excellent transient response and
accurate DC voltage output in PFM Mode. In Pulse Fre-
quency Mode (PFM), the APW8819 provides very high ef-
ficiency over light to heavy loads with loading-modulated
switching frequencies.
The APW8819 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 APW8819 is available in
3mmx3mm 20-pin QFN and 3mmx3mm 16-pin TQFN
packages.
Applications
• DDR2, and DDR3 Memory Power Supplies
• 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.6 - May, 2013
1
www.anpec.com.tw
Free Datasheet http://www.datasheet4u.com/
1 page  
APW8819
Electrical Characteristics (Cont.)
Refer to the typical application circuits. These specifications apply over VVCC=VBOOT=5V, VIN=12V and TA= -40 ~ 85 °C, unless
otherwise specified. Typical values are at TA=25°C.
Symbol
Parameter
Test Conditions
APW8819
Unit
Min. Typ. Max.
VTT OUTPUT
VVTT VTT Output Voltage
VVTT VTT Output Tolerance
ILIM Current-Limit
IVTTLK
IVTTSNSLK
VTT Leakage Current
VTTSNS Leakage Current
IVTTDIS VTT Discharge Current
VTTREF OUTPUT
VLDOIN = VVDDQSNS = 1.8V
VLDOIN = VVDDQSNS = 1.5V
VLDOIN = VVDDQSNS = 1.8V, VVDDQSNS/2 - VVTT,
IVTT = 0A
VLDOIN = VVDDQSNS = 1.8V, VVDDQSNS/2 - VVTT,
IVTT = 1.5A
VLDOIN = VVDDQSNS = 1.5V, VVDDQSNS/2 - VVTT,
IVTT = 0A
VLDOIN = VVDDQSNS = 1.5V, VVDDQSNS/2 - VVTT,
IVTT = 1.5A
Sourcing Current (VLDOIN = 1.8V)
Sinking Current (VLDOIN = 1.8V)
Sourcing Current (VLDOIN = 1.5V)
Sinking Current (VLDOIN = 1.5V)
VVTT = 1.25V, VS3 = 0V, VS5 = 5V, TA = 25oC
VVTT = 1.25V, TA = 25oC
VVTT = 0.5V, VS3 = VS5 = 0V, TA = 25oC,
VVREF = 0V
- 0.9
- 0.75
-20 -
-
-
20
V
-30 -
-20 -
30
mV
20
-30
2
-2
2
-2
-1.0
-1.00
-
-
2.2
-2.2
2.2
-2.2
-
0.01
7.8
30
3
-3
3
-3
1.0
1.00
-
A
A
µA
µA
mA
VVTTREF VTTREF Output Voltage
VTTREF Tolerance
IVTTREF VTTREF Source Current
VLDOIN = VVDDQSNS = 1.8V, VVDDQSNS/2
VLDOIN = VVDDQSNS = 1.5V, VVDDQSNS/2
-10mA < IVTTREF < 10mA, VVDDQSNS/2 - VVTTREF
VLDOIN = VVTTREF =1.8V
-10mA < IVTTREF < 10mA, VVDDQSNS/2 - VVTTREF
VLDOIN = VVDDQSNS = 1.5V
VVTTREF = 0V
- 0.9
- 0.75
-
-
V
-18 - +18
mV
-15 - +15
-10 -25 -40 mA
IVTTREF VTTREF Sink Current
IVTTREFDIS VTTREF Discharge Current
VDDQ OUTPUT
VVTTREF = VVDDQSNS
TA = 25oC , S3=S5=0V, VVTTREF = 0.5V
10 25
- 2.6
40 mA
- mA
VVDDQ
VDDQ Output Voltage
VDDQSNS Regulation Voltage
Tolerance to REFIN
VREFIN = 1.8V
TA = 25oC, VREFIN = 1.8V, No Load
- 1.8 - V
-15 - 15 mV
IVDDQSNS VDDQSNS Input Current
VVDDQSNS=1.8V
- 12 - µA
IREFIN REFIN Input Current
VREFIN=1.8V
-0.1 -
0.1 µA
VDDQ Discharge Current
VS3 = VS5 = 0V, VVDDQSNS = 0.5V, MODE Pin Pulled
-
12
- mA
Down to GND Through 47kΩ (Non-Tracking)
LDOIN Discharge Current
VS3 = VS5 = 0V, VVDDQSNS = 0.5V, MODE Pin
- 1000 - mA
Pulled Down to GND Through 100kΩ (Tracking)
Copyright © ANPEC Electronics Corp.
Rev. A.6 - May, 2013
5
www.anpec.com.tw
Free Datasheet http://www.datasheet4u.com/
5 Page 
APW8819
Operating Waveforms
S3 Enable-Shutdown
Load Transient , IVDDQ= 0A->12A->0A
CH1: VS3 (5V/div)
CH2: VVDDQ (1V/div)
CH3: VVTTREF (500mV/div)
CH4: VVTT (500mV/div)
Time: 10ms/div
Load Transient , IVDDQ = 5A->17A->5A
CH1: VVDDQ (100mV/div)
CH2: VUGATE (20V/div)
CH3: VLGATE (5V/div)
CH4: IL (10A/div)
Time: 20µs/div
Current Limit then Occur UVP
CH1: VVDDQ (100mV/div)
CH2: VUGATE (20V/div)
CH3: VLGATE (5V/div)
CH4: IL (10A/div)
Time: 20µs/div
CH1: VVDDQ (1V/div)
CH2: VVTT (500mV/div)
CH3: VPHASE (20V/div)
CH4: IL (10A/div)
Time: 100µs/div
Copyright © ANPEC Electronics Corp.
Rev. A.6 - May, 2013
11
www.anpec.com.tw
FreeDatasheethttp://www.datasheet4u.com/
11 Page | ||
| Páginas | Total 28 Páginas | |
| PDF Descargar | [ Datasheet APW8819.PDF ] | |
Hoja de datos destacado
| Número de pieza | Descripción | Fabricantes |
| APW8811 | System Power PWM Controller | ANPEC |
| APW8812 | System Power PWM Controller | ANPEC |
| APW8813 | (APW8813/A) DDR2 And DDR3 Power Solution Synchronous Buck Controller | ANPEC |
| APW8813A | (APW8813/A) DDR2 And DDR3 Power Solution Synchronous Buck Controller | ANPEC |
| Número de pieza | Descripción | Fabricantes |
| SLA6805M | High Voltage 3 phase Motor Driver IC. |
 Sanken |
| SDC1742 | 12- and 14-Bit Hybrid Synchro / Resolver-to-Digital Converters. |
 Analog Devices |
|
DataSheet.es es una pagina web que funciona como un repositorio de manuales o hoja de datos de muchos de los productos más populares, |
| DataSheet.es | 2020 | Privacy Policy | Contacto | Buscar |