ADP3163JRUZ-REEL Analog Devices Inc, ADP3163JRUZ-REEL Datasheet

no-image

ADP3163JRUZ-REEL

Manufacturer Part Number
ADP3163JRUZ-REEL
Description
IC REG BUCK 5BIT 2-3PHAS 20TSSOP
Manufacturer
Analog Devices Inc
Datasheet

Specifications of ADP3163JRUZ-REEL

Applications
Controller, Intel Pentium® IV
Voltage - Input
5V, 12V
Number Of Outputs
1
Voltage - Output
1.1 ~ 1.85 V
Operating Temperature
0°C ~ 70°C
Mounting Type
Surface Mount
Package / Case
20-TSSOP
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Other names
ADP3163JRUZREELTR
a
GENERAL DESCRIPTION
The ADP3163 is a highly efficient multiphase synchronous buck
switching regulator controller optimized for converting a 5 V or
12 V main supply into the core supply voltage required by high
performance Intel processors. The ADP3163 uses an internal
5-bit DAC to read a voltage identification (VID) code directly
from the processor, which is used to set the output voltage between
1.1 V and 1.85 V. The ADP3163 uses a current mode PWM
architecture to drive the logic-level outputs at a programmable
switching frequency that can be optimized for VRM size and
efficiency. The phase relationship of the output signals can be
programmed to provide 2- or 3-phase operation, allowing for
the construction of up to three complementary buck switching
stages. These stages share the dc output current to reduce
overall output voltage ripple. An active current balancing func-
tion ensures that all phases carry equal portions of the total load
current, even under large transient loads, to minimize the size of
the inductors.
ADOPT is a trademark of Analog Devices, Inc.
Pentium is a registered trademark of Intel Corporation.
5-Bit Programmable 2-/3-Phase
The ADP3163 also uses a unique supplemental regulation tech-
nique called active voltage positioning (ADOPT) to enhance
load transient performance. Active voltage positioning results in
a dc/dc converter that meets the stringent output voltage specifi-
cations for high performance processors, with the minimum
number of output capacitors and smallest footprint. Unlike
voltage-mode and standard current-mode architectures, active
voltage positioning adjusts the output voltage as a function of
the load current so that it is always optimally positioned for a
system transient. The ADP3163 also provides accurate and
reliable short circuit protection, adjustable current limiting, and
an enhanced Power Good output that can detect open outputs
in any phase for single or multi-VRM systems.
The ADP3163 is specified over the commercial temperature
range of 0 C to 70 C and is available in a 20-lead TSSOP package.
SHARE
COMP
GND
REF
CT
Synchronous Buck Controller
START
SOFT
OSCILLATOR
REFERENCE
FUNCTIONAL BLOCK DIAGRAM
& BIAS
UVLO
VCC
3.0V
VID4 VID3 VID2 VID1
ADP3163
CROWBAR
DAC
CMP
VID
RESET
SET
CMP
VID0
2-/3-PHASE
ADP3163
DRIVER
LOGIC
POWER
DAC+20%
GOOD
PC
DAC+20%
g
m
PWM1
PWM2
PWM3
PGND
PWRGD
CS–
CS+
FB

Related parts for ADP3163JRUZ-REEL

ADP3163JRUZ-REEL Summary of contents

Page 1

GENERAL DESCRIPTION The ADP3163 is a highly efficient multiphase synchronous buck switching regulator controller optimized for converting main supply into the core supply voltage required by high performance Intel processors. The ADP3163 uses ...

Page 2

ADP3163–SPECIFICATIONS Parameter FEEDBACK INPUT Accuracy 1.1 V Output 1.6 V Output 1.85 V Output Line Regulation Input Bias Current Crowbar Trip Point Crowbar Reset Point Crowbar Response Time REFERENCE Output Voltage Output Current VID INPUTS Input Low Voltage Input High ...

Page 3

Parameter PWM OUTPUTS Output Voltage Low Output Voltage High 2 Duty Cycle Limit Per Phase SUPPLY DC Supply Current Normal Mode No CPU Mode UVLO Mode UVLO Threshold Voltage UVLO Hysteresis NOTES 1 All limits at temperature extremes are guaranteed ...

Page 4

ADP3163 Pin Name Function 1–5 VID4 – Voltage Identification DAC Inputs. These pins are pulled internal 3 V reference, providing a VID0 Logic 1 if left open. The DAC output programs the FB regulation voltage from 1.1 ...

Page 5

CT CAPACITANCE – –0.5 Typical Performance Characteristics–ADP3163 4.5 4.4 4.3 4.2 4.1 4.0 0 500 250 300 1.6V ...

Page 6

ADP3163 Table II. Output Voltage vs. VID Code VID4 VID3 VID2 VID1 ...

Page 7

Active Current Sharing The ADP3163 ensures current balance in all the active phases by sensing the current through a single sense resistor. During one phase's ON time, the current through the respective high side MOSFET and inductor is measured through ...

Page 8

ADP3163 tolerance, e.g., an MLC capacitor with NPO dielectric and with 5% or less tolerance. Inductance Selection The choice of inductance determines the ripple current in the inductor. Less inductance leads to more ripple current, which increases the output ripple ...

Page 9

ADP3163 ...

Page 10

ADP3163 At output voltages below 750 mV, the current sense threshold is reduced to 108 mV, and the ripple current is negligible. There- fore, at dead short the output current is reduced to: V 108 ...

Page 11

The critical capacitance limit for this circuit is 6.93 mF, while the actual capacitance of the nine Rubycon capacitors is 9 2200 F = 19.8 mF. In this case, the capacitance is safely above the critical value. Multilayer ceramic capacitors ...

Page 12

ADP3163 Allocating half of the total dissipation for the four high-side MOSFETs and half for the four low-side MOSFETs, and assuming that the resistive and switching losses of the high-side MOSFETs are equal, the required maximum MOSFET resis- tances will ...

Page 13

LAYOUT AND COMPONENT PLACEMENT GUIDELINES The following guidelines are recommended for optimal perfor- mance of a switching regulator system. General Recommendations 1. For good results, at least a four-layer PCB is recommended. This should allow the needed ...

Page 14

ADP3163 14. The output power path, though not as critical as the switch- ing power path, should also be routed to encompass a small area. The output power path is formed by the current path through the current sensing resistor, ...

Page 15

OUTLINE DIMENSIONS Dimensions shown in inches and (mm). 20-Lead TSSOP (RU-20) 0.260 (6.60) 0.252 (6.40 0.177 (4.50) 0.169 (4.30) 0.256 (6.50) 0.246 (6.25 PIN 1 0.006 (0.15) 0.0433 (1.10) MAX 0.002 (0.05) 0.0256 (0.65) 0.0118 (0.30) ...

Page 16

...

Related keywords