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PDF APW7063 Data sheet ( Hoja de datos )
| Número de pieza | APW7063 | |
| Descripción | Synchronous Buck PWM and Linear Controller | |
| Fabricantes | Anpec Electronics Coropration | |
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APW7063
Synchronous Buck PWM and Linear Controller
Features
General Description
• Provide Two Regulated Voltages
- Synchronous Rectified Buck PWM Controller
www.DataSheet4U.com - Linear Controller
• Fast Transient Response
- 0~85% Duty Ratio
• Excellent Output Voltage Regulation
- 0.8V Internal Reference
- ±1% Over Line Voltage and Temperature
• Over Current Protection
- Sense Low-Side MOSFET’s RDS(ON)
• Under Voltage Lockout
• Small Converter Size
- 250KHz Free-Running Oscillator
- Programmable From 70kHz to 800kHz
• 14-Lead SOIC Package
• Lead Free Available (RoHS Compliant)
Applications
• Graphic Cards
• Memory Power Supplies
• DSL or Cable MODEMs
• Set Top Boxes
• Low-Voltage Distributed Power Supplies
The APW7063 integrates PWM and linear controller,
as well as the monitoring and protection functions into
a single package. The synchronous PWM cont roller
which drives dualN-channel MOSFETs, which provides
one controlled power outputs with under-voltage and
over-current protect ions . Linear cont roller drives an
ext ernal N-c hannel MOS FE T with under-volt age
protection.
APW7063 provides excellent regulation for output load
variation. An internal 0.8V temperature-compensated
reference voltage is designed to meet the various low
output voltage applications . A PW 7063 inc ludes a
250kHz free-running t riangle-wave osc illator that is
adjust able from below 70KHz to over 800KHz.
A power-on-reset (POR) circuit limits the VCC minimum
opearting s upply voltage to ass ure the c ontroller
working well. Over current protec tion is achieved by
monit oring t he volt age drop ac ros s the low s ide
MOSFET, eliminating the need for a current sensing
resistor and short circuit condition is detected through
the FB pin. The over-current protection t riggers the
soft -start function until the fault events be removed,
but Under-voltage protection will shutdown IC directly.
Pull the COMP pin below 0.4V will shutdown t he
controller, and both gate drive signals will be low.
Pinouts
RT
SS
VREG
FB
COMP
GND
PHASE
1
2
3
4
5
6
7
14 FBL
13 DRIVE
12 VCC
11 LGATE
10 PGND
9 BOOT
8 UGATE
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.
C opyright © ANPEC Electronics C orp.
Rev. A.7 - Nov., 2005
1
www.anpec.com.tw
1 page  
APW7063
Electrical Characteristics (Cont.)
Unless otherswise specified, these specifications apply over VCC = 12V, VBOOT = 12V, RT = OPE N and
TA = 0 ~ 70oC. Typlcal values are at TA = 25oC.
Symbol
Parameter
Test Conditions
REFERENCE
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VREF Reference Voltage
Reference Voltage Tolerance
PWM EEEOR AMPLIFIER
DC Gain
UGATE Duty Range
FB Input Current
GATE DRIVERS
IUGATE Upper Gate Source
RUGATE Upper Gate Sink
ILGATE Lower Gate Source
RLGATE Lower Gate Sink
TD Dead Time
LINEAR REGULATOR
VBOOT = 12V, VUGATE = 6V
IUGATE = 0.3A
VCC = 12V, VLGATE = 6V
ILGATE = 0.3A
Reference Voltage
Regulation
Output Drive Current
PROTECTION
VDRIVE = 4V
FB Under Voltage Level
FBL Under Voltage Level
OCSET Source Current
VREG
VREG Output Voltage Accuracy
IOUT Output Current Capacity
SOFT START and SHUTDOWN
VCC > 12V
VCC = 12V
TSS Internal Soft-Start Interval
ISS Soft-Start Charge Current
Shutdown Threshold
CSS = 0uF
COMP Falling
Shutdown Hysteresis
APW7063
Unit
Min Typ Max
0.80
-1 +1
V
%
75 dB
0 85 %
0.1 uA
650 800
mA
4 8Ω
550 700
mA
4 8Ω
50 nS
0.8 V
2%
8 10 12 mA
50 %
50 %
250 µA
5.5 6 6.5 V
20 mA
2 mS
8 10 12 uA
0.4 V
50 mV
C opyright © ANPEC Electronics C orp.
Rev. A.7 - Nov., 2005
5
www.anpec.com.tw
5 Page 
APW7063
Typical Characteristics (Cont.)
www.DataSheet4U.com
LGATE Source Current vs. LGATE Voltage
1.4
VCC=12V
1.2
1
0.8
0.6
0.4
0.2
0
0 2 4 6 8 10 12
LGATE Voltage (V)
LGATE Sink Current vs. LGATE Voltage
1.2
VCC=12V
1
0.8
0.6
0.4
0.2
0
0 2 4 6 8 10 12
LGATE Voltage (V)
Over Current Protection
VCC=12V,VIN=12V, VOUT=2.5V, ROCSET=1kW
RDS(ON)=16mW, L=2.2mH, IOUT=15A
IL(10A/div)
SS(5V/div)
UGATE(20V/div)
VOUT1(2V/div)
Time (5us/div)
Switching Frequence vs. RT Resistance
10000
1000
RT pull up to 12V
100
10 RT pull down to GND
1
10 100 1000
Switching Frequency (kHz)
C opyright © ANPEC Electronics C orp.
Rev. A.7 - Nov., 2005
11
www.anpec.com.tw
11 Page | ||
| Páginas | Total 21 Páginas | |
| PDF Descargar | [ Datasheet APW7063.PDF ] | |
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