ANPEC APW7045-10NC-TR, APW7045-10KC-TU, APW7045-10KC-TR Datasheet
Copyright ANPEC Electronics Corp.
Rev.A.5 - Jan., 2003
APW7045
www.anpec.com.tw1
ANPEC reserves the right to make changes to improve reliability or manufacturability without notice, and advise
customers to obtain the latest version of relevant information to verify before placing orders.
The APW7045 integrates PWM controller and linear
controller, as well as the monitoring and protection
functions into a single package, which provides two
controlled power outputs with over-voltage and overcurrent protections. The PWM controller regulates
the DDR termination voltage (1.25V) or GPU Voltage
(2.05V) with a synchronous-rectified buck converter.
The linear controller regulates the Memory Voltage
(2.5V). The pre cision reference and voltage-mode
PWM control provide ±1% static regulation. The linear controller drives an external N-channel MOSFET
to provide adjustable voltage. The APW7045 monitors two output voltages, and a single Power Good
signal is issued when the PWM voltage is within ±10%
of the DAC setting and the lineat regulator output level
is above under-voltage threshold. Additional built-in
over-voltage protection for the PWM output uses the
lower MOSFET to prevent output voltages above 1 15%
of the DAC setting. The PWM over-current function
monitors the output current by using the voltage drop
across the upper MOSFET’s R
DS(ON)
, eliminating the
need for a current sensing resistor.
Features
••
••
•
2 Regulated Voltage are provided
−Switching Power for Fixed Voltage (1.0V)
−Linear Regulator for VMEM(2.5V)
••
••
•
Simple Single-Loop Control Design
−Voltage-Mode PWM Control
••
••
•
Excellent Output Voltage Regulation
−PWM Output: ±1%
−Linear Output: ±3%
••
••
• Fast Transient Response
−High-Bandwidth Error Amplifier
−Full 0% to 100% Duty Ratio
••
••
• Power-Good Output Voltage Monitor
••
••
• Over-Voltage and Over-Current Fault Monitors
••
••
• Small Converter Size
−200KHz Free-Running Oscillator ;
Progammable from 50KHz to 800KHz
−Reduce External Component Count
Applications
••
••
• Motherboard Power Regulation for Computers
••
••
• Low-Voltage Distributed Power Supplies
••
••
• VGA Card Power Regulation
••
••
• DDR SDRAM Power Regulation
General Description
Advanced PWM and Linear Power Controller
Pin Description
FB2
LGATE
OCSET
PGND
UGATE
PHASE
DRIVE
VCC
GND
VSEN1
FB1
COMP
1
11
10
12
9
13
16
8
14
15
7
6
5
4
3
2
SD
SS
FAULT
PGOOD
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APW7045
Copyright ANPEC Electronics Corp.
Rev.A.5 - Jan., 2003
Ordering and Marking Information
Block Diagram
APW7045
Voltage Code
10 : 1 .0 V
Package C ode
K : S OP - 16 (1 5 0 mil) N : S S OP-1 6
Temp. Range
C : 0 to 70° C
Handling Code
TU : Tu b e T R : T a pe & Re e l
Handling Code
Temp. Range
Package C ode
Voltage Code
APW 70 45 K/N :
APW7045
XXXXX
XXXXX - Date Code
PGOOD
Power-on
Reset
(POR)
VCC
200µA
X1.10
+
-
GATE
CONTROL
+
-
PWM
COMP1
SYNCH
DRIVE
OV
UGATE
PHASE
V
CC
LGATE
PGND
COMPFB1
OCSETVSEN1
ERROR
AMP1
PWM1
VCC
INHIBIT
OC1
DRIVE
+
-
+
-
+
-
+
-
X0.90
X1.15
GND
FB2
+
-
X0.75
+
-
1.5V
+
-
DAC
+
-
SOFT
START &
FAULT
LOGIC
SS
OSCILLATOR
V
CC
INHIBIT
SD
FAULT
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APW7045
Copyright ANPEC Electronics Corp.
Rev.A.5 - Jan., 2003
Absolute Maximum Ratings
Symbol Parameter Rating Unit
V
CC
Supply Voltage 15 V
VI , V
O
Input , Output or I/O Voltage GND -0.3 V to VCC +0.3 V
T
A
Operating Ambient Temperature Range 0 to 70
°C
T
J
Junction Temperature Range 0 to 125
°C
T
STG
Storage Temperature Range -65 to +150
°C
T
S
Soldering Temperature 300 ,10 seconds
°C
Electrical Characteristics
Thermal Characteristics
Symbol Parameter Value Unit
θ
JA
Thermal Resistance in Free Air
SOIC
SOIC (with 3in
2
of Copper)
75
65
°
C/W
(Recommended operating conditions , Unless otherwise noted) Refer to Block and Simplified Power System
Diagrams , and Typical Application Schematic.
APW7045
Symbol Parameter Test Conditions
Min. Typ. Max.
Unit
VCC Supply Current
I
CC
Nominal Supply Current
UGATE, LGATE, DRIVE
open
4mA
Power-on Reset
Rising VCC Threshold Vocset=4.5V 10.7
V
CC
Falling VCC Threshold Vocset=4.5V 8.2
V
OCSET
Rising V
OCSET
Threshold 1.26
V
Shutdown Input High Voltage 2.0
V
SD
Shutdown Input Low Voltage 0.8
V
Oscillator
F
OSC
Free Running Frequency Fault= Open 185 200 215 kHz
∆
V
OSC
Ramp Amplitude Fault= Open 1.9 V
P-P
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APW7045
Copyright ANPEC Electronics Corp.
Rev.A.5 - Jan., 2003
Electrical Characteristics (Cont.)
APW7045
Symbol Parameter Test Conditions
Min. Typ. Max.
Unit
DAC Reference Voltage
V
DAC
Reference Voltage APW7045-10
1.00
V
Reference Voltage accuracy -1.0 +1.0 %
Linear Regulator
Reference Voltage 1.5 V
Regulation 3 %
Output Drive Current V
DRIVE
=4V 20 40 mA
Synchronous PWM Controller Error Amplifier
DC Gain 88 dB
GBWP Gain-Bandwidth Product 15 MHz
SR Slew Rate COMP=10pF 6
V/µs
PWM Controller Gate Driver
I
UGATE
UGATE Source VCC=12V, V
UGATE
=6V 1 A
R
UGATE
UGATE Sink V
UGATE1
=1V 2.1 3.5
Ω
I
LGATE
LGATE Source VCC=12V, V
LGATE
=1V 1 A
R
LGATE
LGATE Sink V
LGATE
= 1V 1.6 3
Ω
Protection
VSEN1 Over-Voltage VSEN1 Rising 115 120 %
VSEN1 Over-Voltage Hysteresis 2 %
I
OCSET
OCSET Current Source V
OCSET
= 4.5V 170 200 230
µ
A
I
SS
Soft Start Current 28
µ
A
Power Good
VSEN1 Upper Threshold VSEN1 Rising 109 %
VSEN1 Under Voltage VSEN1 Rising 93 %
VSEN1 Hysteresis Upper /Lower Threshold 2 %
V
PGOOD
PGOOD Voltage Low I
PGOOD
= -4mA 0.2 0.8 V
Functional Pin Description
(Recommended operating conditions, Unless otherwise noted) Refer to Block and Simplified Power System
Diagram, and Typical Application Schematic.
VCC (Pin 1)
Provide a 12V bias supply for the IC to this pin. This
pin also provides the gate bias charge for all the
MOSFETs controlled by the IC. The voltage at this
pin is monitored for Power-On Reset (POR) purposes.
DRIVE (Pin 2)
Connect this pin to the gate of an external MOSFET.
This pin provides the drive for the V
MEM regulator’s pass
transistor.
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