CONTROLLER IC. US3011 Datasheet

US3011 IC. Datasheet pdf. Equivalent

Part US3011
Description 5 BIT PROGRAMMABLE SYNCHRONOUS BUCK CONTROLLER IC
Feature US3011 5 BIT PROGRAMMABLE SYNCHRONOUS BUCK CONTROLLER IC PRELIMINARY DATASHEET FEATURES Dual Layout.
Manufacture UNISEM
Datasheet
Download US3011 Datasheet




US3011
US3011
5 BIT PROGRAMMABLE SYNCHRONOUS BUCK
FEATURES
CONTROLLER IC
PRELIMINARY DATASHEET
DESCRIPTION
Dual Layout Compatible with HIP6004A
Designed to meet Intel specification of VRM8.4
for Pentium III
On board DAC programs the output voltage
from 1.3V to 3.5V. The US3011 remains on for
VID code of (11111).
Loss less Short Circuit Protection
Synchronous operation allows maximum
efficiency
Patented architecture allows fixed frequency
operation as well as 100% duty cycle during
dynamic load
Over Voltage Protection Output
Soft Start
High current totem pole driver for direct
driving of the external Power MOSFET
Power Good function
APPLICATIONS
Pentium III & Pentium IIprocessor DC to DC con-
verter application
Low cost Pentium with AGP
The US3011controller IC is specifically designed to meet
Intel specification for latest Pentium IIImicroproces-
sor applications as well as the next generation P6 fam-
ily processors. These products feature a patented topol-
ogy that in combination with a few external components
as shown in the typical application circuit ,will provide in
excess of 20A of output current for an on- board DC/DC
converter while automatically providing the right output
voltage via the 5 bit internal DAC.These devices also
features, loss less current sensing by using the Rds-
on of the high side Power MOSFET as the sensing
resistor, a Power Good window comparator that switches
its open collector output low when the output is outside
of a ±10% window and an OVP output. Other features of
the device are ; Undervoltage lockout for both 5V and
12V supplies , an external programmable soft start func-
tion as well as programming the oscillator frequency by
using an external capacitor.
TYPICAL APPLICATION
L1
5V
C5 R1
C1
C3
Q1
R2
L2
C8
Q2
R4
R3
C10
12V
C2
VID4
VID3
VID2
VID1
VID0
C6
D1 C4
18 2
V12 CS+
11 NC/Gnd
3 SS
D4
8
D3
7
14
HDrv
D2
6
15
NC/
Boot
13
CS-
US3011
D1 D0
54
17
LDrv
Ct/Rt
20
16 1
Gnd NC/Sen
Vfb 10
R5
V5/Comp 9
OVP
19
PGd
12
C9
C7
C11
R7
R9
C12
R8
C13
R6
C14
3011app1-1.1
Power Good
OVP
Notes: Pentium II and Pentium III are
trade marks of Intel Corp.
PACKAGE ORDER INFORMATION
Ta (°C) Device
0 TO 70 US3011CW
Package
20 pin Plastic SOIC WB
VID Voltage Range
1.3V to 3.5V
Rev. 1.3
12/8/00
4-1



US3011
US3011
ABSOLUTE MAXIMUM RATINGS
V5 supply Voltage ........................................... 7V
V12 Supply Voltage ............................................ 20V
Storage Temperature Range ................................. -65 TO 150°C
Operating Junction Temperature Range .......... 0 TO 125°C
PACKAGE INFORMATION
20 PIN WIDE BODY PLASTIC SOIC (W)
NC 1
CS+ 2
SS 3
D0 4
D1 5
D2 6
D3 7
D4 8
V5 9
Vfb 10
TOP VIEW
20 Ct
19 OVP
18 V12
17 LDrv
16 Gnd
15 NC
14 HDrv
13 CS-
12 PGd
11 NC
θJA =85°C/W
ELECTRICAL SPECIFICATIONS
Unless otherwise specified ,these specifications apply over ,V12 = 12V, V5 = 5V and Ta=0 to 70°C. Typical values
refer to Ta =25°C. Low duty cycle pulse testing are used which keeps junction and case temperatures equal to the
ambient temperature.
PARAMETER
VID Section
DAC output voltage
(note 1)
DAC Output Line Regulation
DAC Output Temp Variation
VID Input LO
VID Input HI
VID input internal pull-up
resistor to V5
Power Good Section
Under voltage lower trip point
Under voltage upper trip point
UV Hysterises
Over voltage upper trip point
Over voltage lower trip point
OV Hysterises
Power Good Output LO
Power Good Output HI
Soft Start Section
Soft Start Current
SYM TEST CONDITION
Vout ramping down
Vout ramping up
Vout ramping up
Vout ramping down
RL=3mA
RL=5K pull up to 5V
CS+ =0V , CS- =5V
MIN
0.99Vs
TYP
Vs
2
27
MAX
1.01Vs
0.1
0.5
0.4
UNITS
V
%
%
V
V
k
0.89Vs
.015Vs
1.09Vs
.015Vs
4.8
0.90Vs
0.92Vs
.02Vs
1.10Vs
1.08Vs
.02Vs
10
0.91Vs
.025Vs
1.11Vs
.025Vs
0.4
V
V
V
V
V
V
V
V
uA
4-2
Rev. 1.3
12/8/00







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