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參數(shù)資料
| 型號： | FAN5019MTCX_NL |
| 廠商： | FAIRCHILD SEMICONDUCTOR CORP |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | SWITCHING CONTROLLER, 4000 kHz SWITCHING FREQ-MAX, PDSO28 |
| 封裝： | LEAD FREE, TSSOP-28 |
| 文件頁數(shù)： | 1/30頁 |
| 文件大?。?/td> | 781K |
| 代理商： | FAN5019MTCX_NL |
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www.fairchildsemi.com
REV. 1.0.7 1/5/04
Features
Pin and Function Backward Compatible with FAN53168
and FAN53180 Controllers
Precision Multi-Phase DC-DC Core Voltage Regulation
– ±10mV Output Voltage Accuracy Over Temperature
Differential Remote Voltage Sensing
Selectable 2, 3, or 4 Phase Operation
Selectable VRM9 or VRM10 Operation
Up to 1MHz per Phase Operation (4MHz ripple
Frequency)
Lossless Inductor Current Sensing for Loadline
Compensation
– External Temperature Compensation
Accurate Load-Line Programming (Meets Intel
VRM/VRD10.0 and 10.X CPU Specications)
Accurate Channel-Current Balancing for Thermal
Optimization and Layout Compensation
Convenient 12V Supply Biasing
6-bit Voltage Identication (VID) Input
– .8375V to 1.600V in 12.5mV Steps
– Dynamic VID Capability with Fault-Blanking for
glitch-less Output voltage Changes
Adjustable Over Current Protection with Programmable
Latch-Off Delay. Latch-Off Function may be Disabled
Over-Voltage Protection – Internal OVP Crowbar
Protection
Applications
Computer DC/DC Converter VRM/VRD10.0
Computer DC/DC Converter VRM/VRD10.X
Computer DC/DC Converter VRM/VRD9.X
High Current, Low Voltage DC/DC Rail
General Description
The FAN5019 is a multi-phase DC-DC controller for imple-
menting high-current, low-voltage, CPU core power regula-
tion circuits. It is part of a chipset that includes external
MOSFET drivers and power MOSFETS. The FAN5019
drives up to four synchronous-rectied buck channels in par-
allel. The multi-phase buck converter architecture uses inter-
leaved switching to multiply ripple frequency by the number
of phases and reduce input and output ripple currents. Lower
ripple results in fewer components, lower component cost,
reduced power dissipation, and smaller board area.
The FAN5019 features a high bandwidth control loop to
provide optimal response to load transients. The FAN5019
senses current using lossless techniques: Phase current is
measured through each of the output inductors. This current
information is summed, averaged and used to set the loadline
of the output via programmable "droop". The droop is tem-
perature compensated to achieve precise loadline character-
istics over the entire operating range. Additionally,
individual phase current is measured using the RDS(ON) of
the low-side MOSFETs. This information is used to dynam-
ically balance/steer per-phase current. The phase currents
are also summed and averaged for over-current detection.
Dynamic-VID technology allows on-the-y VID changes
with controlled, glitch-less output. Additionally, short-circuit
protection, adjustable current limiting, over-voltage protec-
tion and power-good circuitry combine to ensure reliable and
safe operation. The operating temperature range is 0°C to
+85°C and the operating voltage is a single +12V supply,
which simplies the design. The FAN5019 is available in a
TSSOP-28 package.
Block Diagram
FAN5019
V
IN
V
IN
Φ1
Φ4
V
OUT
Φ3
Φ2
FAN5009
FAN5019
6-Bit VID Controller 2-4 Phase VRM10.X Controller
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