US3007CW ETC-unknow, US3007CW Datasheet

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US3007CW

Manufacturer Part Number
US3007CW
Description
Manufacturer
ETC-unknow
Datasheet

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Part Number
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Part Number:
US3007CW
Manufacturer:
UNISEM
Quantity:
1 000
Part Number:
US3007CW
Manufacturer:
UNISEM
Quantity:
20 000
FEATURES
TYPICAL APPLICATION
PACKAGE ORDER INFORMATION
FEATURES
TYPICAL APPLICATION
PACKAGE ORDER INFORMATION
Notes: Pentium II and Pentium Pro are
trade marks of Intel Corp.
Rev. 1.8
12/8/00
APPLICATIONS
APPLICATIONS
5 BIT PROGRAMMABLE SYNCHRONOUS BUCK PLUS NON SYN-
CHRONOUS , LDO CONTROLLER AND 200MmA LDO ON BOARD
Total Power Soloution for Pentium II processor
application
Provides Single Chip Solution for Vcore,
GTL+ ,Clock Supply & 3.3V Switcher on board
Second Switcher Provides Simple Control for
the On board 3.3V supply
200 mA On board LDO regulator
Designed to meet Intel VRM 8.2 and 8.3
specification for Pentium II
On board DAC programs the output voltage
from 1.3V to 3.5V
Linear regulator controller on board for 1.5V
GTL+ supply
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
Minimum part count
Soft Start
High current totem pole driver for direct
driving of the external Power MOSFET
Power Good function Monitors all Outputs
OVP Circuitry Protects the Switcher Outputs
and generates a Fault output
Thermal Shutdown
Vout2
Vout3
5V
Ta ( C)
0 TO 70
SWITCHER2
CONTROL
CONTROL
US3007
LINEAR
US3007CW
Device
REGULATOR
SWITCHER1
DESCRIPTION
DESCRIPTION
The US3007 controller IC is specifically designed to meet
Intel specification for Pentium II microprocessor ap-
plications as well as the next generation of P6 family
processors. The US3007 provides a single chip con-
troller IC for the Vcore , LDO controller for GTL+
and an internal 200mA regulator for clock supply
which are required for the Pentium II applications.
It also contains a switching controller to convert 5V
to 3.3V regulator for an on board applications that
either uses AT type power supply or it is desired
not to rely on the ATX power supply’s 3.3V output.
These devices feature a patented topology that in com-
bination with a few external components as shown in
the typical application circuit ,will provide in excess of
14A of output current for an on- board DC/DC converter
while automatically providing the right output voltage via
the 5 bit internal DAC .The US3007 also features, loss
less current sensing for both switchers by using the
Rds-on of the high side Power MOSFET as the sens-
ing resistor, internal current limiting for the clock
supply, a Power Good window comparator that switches
its open collector output low when any one of the out-
puts is outside of a pre programmed window. Other fea-
tures of the device are ; Undervoltage lockout for both
5V and 12V supplies, an external programmable soft
start function , programming the oscillator frequency via
an external resistor, OVP circuitry for both switcher out-
puts and an internal thermal shutdown.
CONTROL
LINEAR
28 pin Plastic SOIC WB
Package
3007app3-1.0
PRELIMINARY DATASHEET
Vout1
Vout4
US3007
4-1

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US3007CW Summary of contents

Page 1

... OVP circuitry for both switcher out- puts and an internal thermal shutdown. SWITCHER2 CONTROL SWITCHER1 CONTROL US3007 LINEAR LINEAR CONTROL REGULATOR 3007app3-1.0 Device Package US3007CW 28 pin Plastic SOIC WB US3007 PRELIMINARY DATASHEET Vout1 Vout4 4-1 ...

Page 2

US3007 ABSOLUTE MAXIMUM RATINGS 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 PACKAGE INFORMATION 28 PIN ...

Page 3

Error Comparator Section Input bias current Input Offset Voltage Delay to Output Current Limit Section C.S Threshold Set Current C.S Comp Offset Voltage Hiccup Duty Cycle Output Drivers Section Rise Time Fall Time Dead band Time Between High side and ...

Page 4

US3007 I/O O.V. upper trip point I/O O.V. lower trip point FAULT Output HI Note 1: Vs refers to the set point voltage given in Table ...

Page 5

Pin Description PIN# PIN SYMBOL This pin is internally connected to the undervoltage and overvoltage comparators sensing 22 VSEN1 the Vcore status. It must be connected directly to the Vcore supply. This pin provides the feedback for the non-synchronous switching ...

Page 6

US3007 BLOCK DIAGRAM BLOCK DIAGRAM 4.3V Enable V12 28 UVLO 1.17Vset V5 11 Vset VID0 7 2.5V VID1 6 5Bit VID2 5 DAC 1.1Vset VID3 4 VID4 3 Vsen1 22 Fb3 19 0.9Vset V12 Gate3 18 1.26V 0.9V Vsen2 15 ...

Page 7

TYPICAL APPLICATION TYPICAL APPLICATION 12V Vout2 3. Vout3 1.5V C17 Vout4 2.5V C18 Figure 2 - Typical application of US3007 for an on board DC-DC ...

Page 8

US3007 US3007 Application Parts List Ref Desig Description Q1 MOSFET Q2 MOSFET Q3 MOSFET Q4 MOSFET with Schottky D1 Diode L1 Inductor L2 Inductor L3 Inductor C1 Capacitor, Electrolytic C2 Capacitor, Electrolytic C3 Capacitor, Electrolytic C4,13 Capacitor, Ceramic C5,10 Capacitor, ...

Page 9

TYPICAL APPLICATION TYPICAL APPLICATION (Dual Layout with HIP6019) 12V Vout2 3. Vout3 1.5V C17 Vout4 2.5V C18 Figure 3 - Typical application of US3007 ...

Page 10

US3007 US3007 Application Parts List Dual Layout with HIP6019 Ref Desig Description Q1 MOSFET Q2 MOSFET Q3 MOSFET Q4 MOSFET with Schottky D1 Diode L1 Inductor L2 Inductor L3 Inductor C1 Capacitor, Electrolytic C2 Capacitor, Electrolytic C3 Capacitor, Electrolytic C4,13 ...

Page 11

Application Information Application Information An example of how to calculate the components for the application circuit is given below. Assuming, two set of output conditions that this regula- tor must meet for Vcore : a) Vo=2.8V , Io=14.2A, Vo=185mV, Io=14.2A ...

Page 12

US3007 Output Inductor Selection The output inductance must be selected such that un- der low line and the maximum output voltage condition, the inductor current slope times the output capacitor ESR is ramping up faster than the capacitor voltage is ...

Page 13

For example, if the desired current limit point is set to be 22A for the synchronous and 16A for the non syn- chronous , and from our previous selection, the maxi- mum MOSFET Rds-on =19mW, then the current sense resistor ...

Page 14

US3007 R19= 100* Vdac /(Vo - 1.004*Vdac) R19= 100* 2.8 /(2.835 - 1.004*2.800) = 11.76 k Select 11 Note: The value of the top resistor must not exceed 100 . The bottom resistor can then be adjusted ...

Page 15

Note better to place the 1.5V linear regulator com- ponents close to the 3007 and then run a trace from the output of the regulator to the load. However, if this is not possible then the trace from ...

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