The AP2007 is a low-cost, full featured, synchronous
voltage-mode controller designed for use in single
ended power supply applications where efficiency is
of primary concern. Synchronous operation allows
for the elimination of heat sinks in many applications.
The AP2007 is ideal for implementing DC/DC
converters
needed
to
power
advanced
microprocessors in low cost systems or in distributed
power applications where efficiency is important.
High-side drive circuitry, and preset shoot-thru
control,
allows
the
use
of
inexpensive
1P+1N-channel power switches.
AP2007’s
features
include
temperature
compensated voltage reference,
Virtual Frequency
Control
TM
method to reduce external component count,
an internal 200KHz virtual frequency oscillator,
under-voltage
lockout
protection,
soft-start,
shutdown function and current sense comparator
circuitry.
Virtual Frequency Control is a trademark of
PWRTEK, LLC.
Applications
- Microprocessor Core Supply
- Low Cost Synchronous Applications
- Voltage Regulator Modules (VRM)
- Networking Power Supplies
- Sequenced Power Supplies
- Telecommunication Power Supplies.
Pin Assignments
(Top View)
VCC
DRVP
GND
DRVN
1
2
3
4
8
Pin Descriptions
Name
7
6
5
Description
Chip supply voltage
Reference voltage
Input from the phase node between
the MOSFETs
High side driver output (P MOSFET)
Ground
Low side driver output (N MOSFET)
Feedback input
Soft start, a capacitor to ground sets
the slow start time / Shutdown
function
AP2007
V
REF
PHASE
FB
SS/SHDN
VCC
V
REF
PHASE
DRVP
GND
DRVN
FB
SS/
SHDN
SOP-8L
Ordering Information
AP2007 X X
Package
S: SOP-8L
Packing
Blank : Tube
A : Taping
This datasheet contains new product information. Anachip Corp. reserves the rights to modify the product specification without notice. No liability is assumed as a result of the use of
this product. No rights under any patent accompany the sale of the product.
Rev. 1.0 Apr 1, 2005
1/7
AP2007
Synchronous PWM Controller
Block Diagram
GND
+
-
0.4V
+
-
OCSET
PHASE
VCC
VOLTAGE
REFERENCE
V
REF
0.8V
+
-
UNDER
VOLTAGE
FB
SS/SHDN
ERROR
COMP
+
-
+
-
0.4V
VCC
12ua
VCC
R Q
S
CROSS
CURRENT
CONTROL
DRVP
DRVP
VIRTUAL FREQ
OSCILLATOR
2ua
+
DRVN
Q
S
DRVN
-
0.2V
QB R
+
Virtual Frequency Control - Patent
Number 6,456,050.
0.9V
-
AP2007 FUNCTIONAL BLOCK DIAGRAM
Absolute Maximum Ratings
Symbol
V
IN
V
PHASE
V
DRVP
V
DRVN
θ
JC
θ
JA
T
OP
T
ST
T
LEAD
Parameter
VCC to GND
PHASE to GND
DRVP to GND
DRVN to GND
Thermal Resistance Junction to Case
Thermal Resistance Junction to Ambient
Operating Temperature Range
Storage Temperature Range
Lead Temperature (Soldering) 10 Sec.
Range.
-1 to 22
-1 to 22
-1 to 22
-1 to 22
90
250
-40 to +85
-65 to +150
300
Unit
V
V
V
V
o
C/W
o
C/W
o
C
o
C
o
C
Anachip Corp
www.anachip.com.tw
2/7
Rev. 1.0 Apr 1, 2005
AP2007
Synchronous PWM Controller
Electrical Characteristics
Unless specified: V
CC
=12V; GND = 0V;V
O
= 5V; T
J
= 25 C
o
Symbol
Parameter
Power Supply
Supply Voltage
V
CC
(Recommended)
I
CC
Supply Current
∆V
LINE
Line Regulation
Error Comparator
A
OL
Gain (A
OL
)
I
B
Input Bias
Oscillator
F
OSC
Oscillator Frequency
DC
MAX
Oscillator Max Duty Cycle
Mofset Drivers
I
DRVP
I
DRVN
DRVP Source/Sink
DRVN Source/Sink
Conditions
Min.
4.5
Typ.
-
9.5
0.5
70
0.2
200
85
1
1
-
-
150
0.4
-
0.8
-
10
2
4.0
3.8
200
Max.
20
-
-
1
-
-
-
-
1.2
-
-
-
0.816
+2
12
2.7
-
-
-
Unit
V
mA
%
dB
uA
KHz
%
A
A
V
V
nS
V
V
V
%
uA
uA
V
V
mV
DRVP & DRVN are floating
V
O
= 2.5V
-
-
-
-
-
80
V
CC
– V
DRVP
=3V
V
DRVP
– V
GND
= 2V
V
CC
– V
DRVN
= 3V
V
DRVL
– V
GND
= 2V
0.5
0.5
-
V
CC
-1.2
V
DRVL
DRVP/N Low Level Voltage
V
DRVH
DRVP/N High Level Voltage
Protection
T
DEAD
Dead Time
Vocset Over Current Setting Voltage
DRVP/DRVN System Error
V
DRVP/N
Voltage (Note3)
Reference
Reference Voltage
V
REF
Accuracy
Soft Start
I
SSC
Charge Current
I
SSD
Discharge Current
Under voltage lockout (UVLO)
V
UT
Upper Threshold Voltage (V
CC
)
V
LWT
Lower Threshold Voltage (V
CC
)
V
HT
Hysteresis (V
CC
)
DRVP & DRVN are floating
V
SS
=Low, V
CC
＜3.8,
over current happen
0 C to 70 C
V
SS
= 1.5V
V
SS
= 1.5V
o
o
-
V
CC
-1.2
0.784
-2
8.0
1.3
-
-
-
Note 1.
Specification refers to Typical Application Circuit.
Note 2.
This device is ESD sensitive. Use of standard ESD handling precautions is required.
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