中文
EnglishThe 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
Features
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)
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.
General Description
The APW8819 integrates a synchronous buck PWM con-
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
· 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
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.
相关产品
Part_No | Package & Pins | Topology | Architecture | Phase | No. of PWM Outputs | Output Current (max)(A) | Input Voltage (V) | Reference Voltage(V) | Bias Voltage (typ) (V) | Quiescent Current (typ)(uA) | |
min | max | ||||||||||
APW7068 | SOP-14 | Buck | VM | 1 | 1 | 30 | 2.9 | 13.2 | 0.9 | 12 | 8000 |
APW7065 | SOP-8 | Buck | VM | 1 | 1 | 20 | 2.9 | 13.2 | 0.8 | 12 | 5000 |
APW7065C | SOP-8 | Buck | VM | 1 | 1 | 20 | 2.9 | 13.2 | 0.8 | 12 | 5000 |
APW7098 | QFN4x4-24 | Multiphase | VM | 2 | 1 | 60 | 3.1 | 13.2 | 0.6 | 12 | 5000 |
APW7120 | SOP-8 | Buck | VM | 1 | 1 | 20 | 2.2 | 13.2 | 0.8 | 5 / 12 | 2100 |
APW7120A | SOP-8 | Buck | VM | 1 | 1 | 20 | 2.2 | 13.2 | 0.8 | 5 / 12 | 2100 |
APW7037/A/B | SOP-8 | Buck | VM | 1 | 1 | 5 | 5 | 13.2 | 1.25 / 0.8 | 5 / 12 | 3000 |
APW7057 | SOP-8 | Buck | VM | 1 | 1 | 10 | 3.3 | 5.5 | 0.8 | 5 | 2100 |
APW7062B | SOP-14 | Buck | VM | 1 | 1 | 10 | 5 | 13.2 | 0.8 | 12 | 2000 |
APW7066 | TSSOP-24 | Buck | VM | 1 | 2 | 20 | 5 | 13.2 | 0.6 | 5 / 12 | 4000 |
APW7067N | SOP-14 | Buck | VM | 1 | 1 | 30 | 2.9 | 13.2 | 0.9 | 12 | 4000 |
APW7073 | SOP-14 | Buck | VM | 1 | 1 | 30 | 2.2 | 13.2 | 0.6 | 12 | 5000 |
APW7073A | SOP-14 | Buck | VM | 1 | 1 | 30 | 2.2 | 13.2 | 0.6 | 12 | 5000 |
APW7074 | SOP-14 | Buck | VM | 1 | 1 | 25 | 2.2 | 13.2 | 0.8 | 12 | 5000 |
APW7095/A | LQFP7x7-48 | Buck | VM | 1 | 6 | 0.015 | 1.4 | 6.5 | - | 5 | 1800 |
APW7116 | TSSOP-24P | Buck | VM | 1 | 2 | 20 | 2.97 | 5.5 | 0.8 | 5 / 12 | 5000 |
APW7063 | SOP-14 | Buck | VM | 1 | 1 | 10 | 5 | 13.2 | 0.8 | 12 | 3000 |
APW7064 | SOP-8-P | Buck | VM | 1 | 1 | 30 | 2.9 | 13.2 | 1.2 | 12 | 3000 |
APW7108 | SSOP-28 | Buck | VM | 1 | 2 | 20 | 5 | 24 | 0.9 | 5 | 1200 |
APW7158 | SOP-20 | Buck | VM | 1 | 2 | 20 | 2.2 | 13.2 | 0.6 | 5 / 12 | 4000 |
APW7181 | SOP-8 | VM | 1 | 2 | - | - | - | - | 5 / 12 | 550 | |
APW38HC/42/3/4/5A | DIP-8 | Buck | VM | 1 | 1 | 1 | 1.2 | 9 | 24 | 5 | 9 ~ 24 |
APW7138 | SSOP-16 | Buck | VM | 1 | 1 | 25 | 3 | 25 | 0.6 | 5 | 1700 |
APW7199 | TDFN3x3-10 | Buck | COT | 1 | 1 | 25 | 3 | 25 | 0.5 | 5 | 350 |
APW8700 | QFN4x4-24 | Buck | CM | 2 | 1 | 40 | 4.5 | 13.2 | 0.6 | 5 / 12 | 4000 |
APW8720B | SOP8-P | Buck | VM | 1 | 1 | 20 | 3 | 13.2 | 0.8 | 5 / 12 | 2500 |
APW8722A/B/C/D | SOP8-P | Buck | VM | 1 | 1 | 25 | 3 | 13.2 | 0.6 /0.8 | 5 / 12 | 1200 |
APW8723 | TDFN3x3-10 | Buck | VM | 1 | 1 | 25 | 4 | 13.2 | 0.8 | 5 / 12 | 2000 |
APW8724 | TDFN3x3-10 | Buck | COT | 1 | 1 | 25 | 4.5 | 25 | 0.6 | 5 / 12 | 80 |
APW8725/A | SOP-8P | Buck | VM | 1 | 1 | 25 | 4.5 | 13.2 | 0.8 | 5 / 12 | 16000 |
APW8726 | TQFN3x3-10 | Buck | VM | 1 | 1 | 25 | 4.5 | 13.2 | 0.6 | 5 / 12 | 2500 |
APW8727/L | TDFN3x3-10 | Buck | COT | 1 | 1 | 30 | 3 | 25 | 0.8 | 5 / 12 | 2000 |
APW8728 | TQFN3x3-16 | Buck | COT | 1 | 1 | 30 | 1.8 | 28 | 0.6 | 5 | 600 |
APW8732 | QFN4x4-24 | Buck | VM | 2 | 1 | 50 | 4.5 | 13.2 | 0.6 | 5 / 12 | 5000 |
APW8811 | TQFN4x4-24 | Buck | COT | 1 | 2 | 15 | 6 | 25 | 2 | N | 550 |
APW8812 | TQFN4x4-24 | Buck | COT | 1 | 2 | 15 | 6 | 25 | 2 | N | 550 |
APW8813/A | TQFN4x4-24 | Buck | COT | 1 | 2 | 20 | 3 | 28 | 0.75 | 5 | 800 |
APW8814 | TQFN3x3-16 | Buck | COT | 1 | 1 | 20 | 1.8 | 28 | 0.75 | 5 | 400 |
APW8815 | QFN3.5x3.5-14 | Buck | COT | 1 | 1 | 20 | 1.8 | 28 | 0.75 | 5 | 400 |
APW8816 | TQFN3x3-16 | Buck | COT | 1 | 2 | 20 | 1.8 | 28 | 0.75 | 5 | 400 |
APW8819 | QFN3x3-20 | Buck | COT | 1 | 2 | 20 | 3 | 28 | 1.8 /1.5 /0.5 | 5 | 740 |
APW8820 | TQFN4x4-24 | Buck | CM | 1 | 2 | 15 | 5 | 28 | 0.5 | N | 3000 |
APW8821 | TDFN3x3-10 | Buck | COT | 1 | 1 | 20 | 1.8 | 28 | 0.5 | 5 | 250 |
APW8822/C | TQFN3x3-20 | Buck | COT | 1 | 2 | 15 | 6 | 25 | 2 | N | 550 |
APW8823A/B | TQFN3x3-20 | Buck | COT | 1 | 2 | 15 | 5.5 | 25 | 0.6 | N | 50 |
APW8868 | TQFN3x3-20 | Buck | COT | 1 | 2 | 20 | 3 | 28 | 0.75 | 5 | 180 |
APW7088 | QFN4x4-24 | Multiphase | VM | 2 | 1 | 60 | 3.1 | 13.2 | 0.85 | 12 | 5000 |
APW7165A/B/C | SOP-8P | Buck | VM | 1 | 1 | 20 | 2.9 | 13.2 | 0.8 | 12 | 16000 |
APW7159A | SOP-20 | Buck | VM | 2 | 2 | 30 | 10 | 13.2 | 1 | 12 | 5000 |
APW8828 | TDFN3x3-10 | Buck | COT | 1 | 1 | 25 | 1.8 | 28 | 0.7 | 5 | 250 |
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