Anpec APW7058 Synchronous buck pwm and linear controller Datasheet

APW7058
Synchronous Buck PWM and Linear Controllers
Features
•
General Description
Provides Two Regulated Voltages
The APW7058 integrates one synchronous-rectified
Buck PWM controller and one linear controller to provide two regulated voltages for graphics cards and
other embedded processor applications. The PWM
controller which drives dual N-channel MOSFETs uses
fixed 600kHz frequency, voltage-mode PWM control
and integrates power-on-reset(POR), built-in soft-start,
output under-voltage monitoring and shutdown functions into a single chip. The linear controller which
drives a N-channel MOSFET bypass transistor allows
users to optimize the transient response by external
components. The POR circuit with hysteresis monitors both 5VCC and 12VCC supply voltages to start
up/shutdown the IC at power-on/off. An internal 0.8V
temperature-compensated reference is designed to
meet the low output voltage requirement for further
applications. The built-in soft-start function sets the
soft-start interval to prevent the output voltages from
overshoot as well as limiting the input currents. The
under-voltage protections monitor the voltages at FB
and FB2 for short-circuit protection. The under-voltage protections cycle the soft-start function until 3
times of UVP events are happened. Pulling and holding the FB2 pin above 1.28V to disable the both
controllers.
- One Synchronous-Rectified Buck PWM
Controller
- One Linear Controller
•
Low Reference Voltage for Further Applications
- Both Controllers : 0.8V ± 2% Over
Temperature
•
Both Controllers Drive N-Channel MOSFETs
- PWM Controller Drives Dual N-Channel
MOSFETs
- Linear Controller Drives N-Channel MOSFET
•
Built-in PWM Feedback Compensation
- No Steady-State Error
- Voltage-Mode PWM Control
- Full 0~100% Duty Ratio
- Fast Transient Response
• Adjustable Outputs by External Resistor Dividers
• Under-Voltage Monitoring on Both Controllers
• Small Converter Size
- 600kHz Constant Switching Frequency
- Built-In Soft-Start
- Simple SO-8 Package
•
•
Pin Description
Shutdown Control
Lead Free Available (RoHS Compliant)
Applications
•
•
•
12VCC
1
8
FB
UGATE
2
7
FB2
GND
3
6
DRIVE2
LGATE
4
5
5VCC
Motherboard
Graphics Cards
12V, 5V and 3.3V Inputs DC-DC Converter
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.
Copyright  ANPEC Electronics Corp.
Rev. A.3 - Mar., 2005
1
www.anpec.com.tw
APW7058
Ordering and Marking Information
P a c k a g e C od e
K : SOP - 8
O p e ra tin g J u n c tio n T e m p . R an g e
C : 0 to 70 °C
H a n d lin g C od e
TU : Tube
T R : T a p e & R e el
L e ad F re e C od e
L : L ea d F ree D e v ic e
B la nk : O rig in a l D e vic e
APW 7058
L e ad F re e C od e
H a n d lin g C od e
T e m p . R a n ge
P a c k a g e C od e
APW 7058
XXXXX
APW 7058 K :
X X X X X - D a te C o de
Notes: ANPEC lead-free products contain molding compounds/die attach materials and 100% matte in plate
termination finish; which are fully compliant with RoHS and compatible with both SnPb and lead-free soldiering
operations. ANPEC lead-free products meet or exceed the lead-free requirements of IPC/JEDEC J STD-020C for
MSL classification at lead-free peak reflow temperature.
Block Diagram
12VCC
5VCC
UGATE
Power
On Reset
PW M
PO R
0.5V
Gate
Control
Soft-Start
and Fault
Logic
UVP1
5VC C
LGATE
Inhibit /
Soft-Start
FB2
UVP2
COMP
FB
0.5V
12VC C
Error
Am plifier
VREF
0.8V
Shutdow n
Oscillator
Copyright  ANPEC Electronics Corp.
Rev. A.3 - Mar., 2005
F O SC
600kH z
2
1.28V
Linear
C ontroller
DRIVE2
GND
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APW7058
Typical Application
R4
+12V
+5V
C8
1uF
5
1
VIN2
+3.3V
C10
470uF
Q3
R9
0
UGATE
6
4
L1
1uH
R6
0
VOUT1
+1.263V
C5, C6 /10A
D1
2 x 470uF
Q2
U1
APW7058
FB
7
R7
2.37k
Q1
R5
0
LGATE
C9
33pF
C11
470uF
2
C2, C3
2 x 470uF
DRIVE2
R10
27k
VOUT2
+2.5V/3A
VIN1
+3.3V
C4
4.7uF
5VCC
12VCC
L2
1uH
C1 2.2
1uF
R1
590
8
FB2
R8
1.13k
GND
3
R2
1.02k
C7
68nF
R3
0
Q1, Q2 : APM2014N UC
D1 : 3A Schcottky Diode
Q3 : APM2055N UC
C2, C3, C5, C6, C10, C11 : 470µF/6.3V, ESR=30mΩ
Absolute Maximum Ratings
Symbol
Parameter
Rating
Unit
5V CC
5VCC Supply Voltage (5VCC to GND)
-0.3 ~ 7
V
12V CC
12VCC Supply Voltage (12VCC to GND)
-0.3 ~ 15
V
UAGTE, DRIVE2 to GND
-0.3 ~ 12V CC
V
LGATE, FB, FB2 to GND
-0.3 ~ 5V CC
Maximum Junction Temperature
T STG
Storage Temperature
V
150
o
C
-65 ~ 150
o
C
o
C
T SDR
Maximum Soldering Temperature, 10 Seconds
300
V ESD
Minimum ESD Rating (Human body model)
±2
KV
Thermal Characteristics
Symbol
θJA
Parameter
Value
Junction-to-Ambient Resistance in free air (SOP-8)
Copyright  ANPEC Electronics Corp.
Rev. A.3 - Mar., 2005
3
160
Unit
o
C/W
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APW7058
Recommended Operating Conditions
Symbol
(Note)
Parameter
Range
Unit
5 ± 5%
V
5V CC
5VCC Supply Voltage
12V CC
12VCC Supply Voltage
12 ± 10%
V
V OUT1
Output Voltage of the Buck converter
0.8 ~ 3.3
V
3.3/5 ± 5%
V
0.8 ~ 3.3
V
V IN1
V OUT2
V IN2
TA
TJ
Input Voltage of the Buck converter
Output Voltage of the Linear Regulator
3.3/5 ± 5%
Input Voltage of the Linear Regulator
Ambient Temperature
Junction Temperature
V
0 ~ 70
o
C
0 ~ 125
o
C
Note : Refer to the typical application circuit
Electrical Characteristics
Unless otherwise specified, these specifications apply over 5VCC=5V, 12VCC=12V and TA= 0~70 oC. Typical
values are at TA=25oC.
APW7058
Unit
Symbol
Parameter
Test Conditions
Min Typ Max
SUPPLY CURRENT
ICC
5VCC Supply Current
LGATE Open, FB2=DRIVE2
2.5
mA
12VCC Supply Current
UGATE Open
2.5
mA
POWER-ON RESET
Rising 5VCC Threshold
12VCC=12V
4.0
4.2
4.5
V
Falling 5VCC Threshold
12VCC=12V
3.5
3.7
3.9
V
Rising 12VCC Threshold
5VCC =5V
9.6
10.3 10.8
V
Falling 12VCC Threshold
5VCC =5V
9.3
9.7
10.2
V
550
600
650
kHz
OSCILLATOR
FOSC
∆VOSC
Free Running Frequency
Ramp Upper Threshold
2.85
V
Ramp Lower Threshold
0.95
V
Ramp Amplitude
1.9
VP-P
0.8
V
REFERENCE VOLTAGE
VREF
Reference Voltage
System Accuracy
Copyright  ANPEC Electronics Corp.
Rev. A.3 - Mar., 2005
Over Line, Load and
Temperature
4
-2
+2
%
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APW7058
Electrical Characteristics (Cont.)
Unless otherwise specified, these specifications apply over 5VCC=5V, 12VCC=12V and TA= 0~70 oC. Typical
values are at TA=25oC.
APW7058
Symbol
Parameter
Test Conditions
Min
Typ
Max
Unit
BUILT-IN PWM FEEDBACK COMPENSATION
DC Gain
75
dB
FP
First Pole Frequency
10
Hz
FZ
First Zero Frequency
1
kHz
UGATE Duty Range
0
FB Input Current
100
%
0.1
µA
PWM CONTROLLER GATE DRIVERS
TD
UGATE Source
VUAGTE=1V
0.6
A
UGATE Sink
VUGATE=1V
7.3
Ω
LGATE Source
VLGATE=1V
0.6
A
LGATE Sink
VLGATE=1V
1.8
Ω
50
nS
78
1.6
1
dB
Dead Time
LINEAR CONTROLLER
DC Gain
Gain Bandwidth Product
CL=0.5nF
CL=1nF
FB Input Current
MHz
0.1
µA
DRIVE2 Source Current
VFB2=VREF-20mV, VDRIVE2=7V
9.8
mA
DRIVE2 Sink Current
VFB2=VREF+20mV, VDRIVE2=3V
2.6
mA
DRIVE2 Output High Voltage
DRIVE2 Open
11.7
V
DRIVE2 Output Low Voltage
DRIVE2 Open
0.01
V
FB or FB2 Falling
0.5
V
15
mV
2
mS
1.28
V
30
mV
UNDER-VOLTAGE PROTECTION
UVFB
FB/FB2 Under-Voltage Level
FB/FB2 Under-Voltage
Hysteresis
SOFT-START AND SHUTDOWN
T SS
Soft-Start Interval
FB2 Shutdown Threshold
FB2 Rising
FB2 Shutdown Hysteresis
Copyright  ANPEC Electronics Corp.
Rev. A.3 - Mar., 2005
5
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APW7058
Functional Pin Description
12VCC (Pin 1)
FB2 (Pin 7)
Connect this pin to 12V supply voltage. It provides
bias voltage for the high-side MOSFET driver and the
linear controller. The voltage at this pin is monitored
for Power-On-Reset purposes.
Connect this pin to the output (VOUT2) of the linear
regulator via a proper sized resistor divider. The voltage at this pin is regulated to 0.8V and the VOUT2 is
determined using the following formula :
R7
VOUT2=0.8V x (1+ R8 )
UGATE (Pin 2)
where R7 is the resistor connected from VOUT2 to FB2,
and R8 is the resistor connected from FB2 to GND.
This pin is also monitored for under-voltage events.
Pulling and holding FB2 above 1.28V shuts down both
regulators. Releasing FB2 initiates soft-start on both
regulators.
Connect this pin to the gate of the high-side MOSFET.
This pin provides gate drive for the MOSFET.
GND (Pin 3)
Signal and power ground for the IC. Putting vias to
ground planet directly and close to GND pins minimizes noises.
FB (Pin 8)
This pin is the inverting input of the internal error
amplifier. Connect this pin to the output (VOUT1) of
LGATE (Pin 4)
Connect this pin to the gate of the low-side MOSFET.
This pin provides gate drive for the MOSFET.
the Buck converter via a proper sized resistor divider
to provide feedback loop of the Buck converter. The
VOUT1 is determined using the following formula :
R1
VOUT1=0.8V x (1+ R2 )
5VCC (Pin 5)
Connect this pin to a 5V supply voltage via a RC filter
(2.2Ω and 1µF are recommended). This pin provides the bias for the control circuitry and the lowside MOSFET driver. The voltage at this pin is monitored for Power-On-Reset purposes.
where R1 is the resistor connected from VOUT1 to FB,
and R2 is the resistor connected from FB to GND.
This pin is also monitored for under-voltage events.
DRIVE2 (Pin 6)
Connect this pin to the gate of an external N-Channel
MOSFET transistor. This pin provides the gate voltage for the linear regulator pass transistor. It also
provides a means of compensating the linear controller for applications where the user needs to optimize
the regulator transient response.
Copyright  ANPEC Electronics Corp.
Rev. A.3 - Mar., 2005
6
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APW7058
Typical Characteristics
Reference Voltage
vs. Junction Temperature
Switching Frequency
vs. Junction Temperature
650
Switching Frequency, FOSC (kHz)
Reference Voltage, VREF (V)
0.816
0.812
0.808
0.804
0.800
0.796
0.792
0.788
0.784
-50
-25
0
25
50
75
100
125
630
620
610
600
590
580
570
560
550
-50
150
-25
0
25
50
75
100
125
150
Junction Temperature (°C)
Junction Temperature (oC)
Copyright  ANPEC Electronics Corp.
Rev. A.3 - Mar., 2005
640
7
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APW7058
Operating Waveforms
(Refer to the typical application circuit)
1.VOUT1 Load Transient Response : IOUT = 0A -> 10A -> 0A
- IOUT1 slew rate = ±10A/µS
IOUT = 0A -> 10A
IOUT = 0A -> 10A -> 0A
IOUT = 10A -> 0A
VOUT1
VOUT1
VOUT1
VUGATE
VUGATE
10A
IOUT1
IOUT1
0A
Ch1 : VOUT1, 100mV/Div, DC,
Offset = 1.25V
Ch2 : VUGATE, 10V/Div, DC
Ax1 : IOUT1, 5A/Div
Time : 5µS/Div
BW = 20MHz
IOUT1
Ch1 : VOUT1, 100mV/Div, DC,
Offset = 1.25V
Ax1 : IOUT1, 5A/Div
Time : 100µS/Div
BW = 20MHz
Ch1 : VOUT1, 100mV/Div, DC,
Offset = 1.25V
Ch2 : VUGATE, 10V/Div, DC
Ax1 : IOUT1, 5A/Div
Time : 5µS/Div
BW = 20MHz
2.VOUT2 Load Transient Response : IOUT = 0.2A -> 3A -> 0.2A
- IOUT2 slew rate = ±3A/µS
IOUT = 0.2A -> 3A
IOUT = 0.2A -> 3A -> 0.2A
IOUT = 3A -> 0.2A
VOUT2
VOUT2
VOUT2
3A
IOUT2
IOUT2
IOUT2
0.2A
Ch1 : VOUT2, 50mV/Div, DC,
Offset = 2.50V
Ax1 : IOUT2, 1A/Div
Time : 1µS/Div
BW = 20MHz
Copyright  ANPEC Electronics Corp.
Rev. A.3 - Mar., 2005
Ch1 : VOUT2, 50mV/Div, DC,
Offset = 2.50V
Ax1 : IOUT2, 1A/Div
Time : 50µS/Div
BW = 20MHz
8
Ch1 : VOUT2, 50mV/Div, DC,
Offset = 2.50V
Ax1 : IOUT2, 1A/Div
Time : 1µS/Div
BW = 20MHz
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APW7058
Operating Waveforms (Cont.)
3. Powering ON / OFF
Soft-start at Powering ON
Powering OFF
+12V
+12V
+5V
+5V
VOUT2
VOUT2
VOUT1
VOUT1
Ch1 : +5V, 1V/Div, DC
Ch2 : +12V, 2V/Div, DC
Ch3 : VOUT1, 1V/Div, DC
Ch1 : +5V, 1V/Div, DC
Ch2 : +12V, 2V/Div, DC
Ch3 : VOUT1, 1V/Div, DC
Ch4 : VOUT2, 1V/Div, DC
Time : 5mS/Div
BW = 20MHz
Ch4 : VOUT2, 1V/Div, DC
Time : 1mS/Div
BW = 20MHz
4. UGATE and LGATE
UGATE Rising
UGATE Falling
IOUT=10A
IOUT=10A
VUGATE
VUGATE
VLGATE
VLGATE
Ch1 : VUGATE, 2V/Div, DC
Ch2 : VLGATE, 2V/Div, DC
Time : 50nS/Div
BW = 500MHz
Copyright  ANPEC Electronics Corp.
Rev. A.3 - Mar., 2005
Ch1 : VUGATE, 2V/Div, DC
Ch2 : VLGATE, 2V/Div, DC
Time : 50nS/Div
BW = 500MHz
9
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APW7058
Packaging Information
E
e1
0.015X45
SOP-8 pin ( Reference JEDEC Registration MS-012)
H
e2
D
A1
1
L
0.004max.
Dim
A
Mi ll im et er s
Inche s
A
Min .
1. 35
Max .
1. 75
Min.
0. 053
Max .
0. 069
A1
D
E
0. 10
4. 80
3. 80
0. 25
5. 00
4. 00
0. 004
0. 189
0. 150
0. 010
0. 197
0. 157
H
L
e1
e2
5. 80
0. 40
0. 33
6. 20
1. 27
0. 51
0. 228
0. 016
0. 013
0. 244
0. 050
0. 020
φ 1
Copyright  ANPEC Electronics Corp.
Rev. A.3 - Mar., 2005
1. 27B S C
0. 50B S C
8°
8°
10
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APW7058
Physical Specifications
Terminal Material
Lead Solderability
Packaging
Solder-Plated Copper (Solder Material : 90/10 or 63/37 SnPb), 100%Sn
Meets EIA Specification RSI86-91, ANSI/J-STD-002 Category 3.
2500 devices per reel
Reflow Condition
(IR/Convection or VPR Reflow)
tp
TP
Critical Zone
T L to T P
Temperature
Ram p-up
TL
tL
Tsm ax
Tsm in
Ram p-down
ts
Preheat
25
t 25 °C to Peak
Tim e
Classificatin Reflow Profiles
Profile Feature
Sn-Pb Eutectic Assembly
Large Body
Small Body
Average ramp-up rate
3°C/second max.
(TL to TP)
Preheat
- Temperature Min (Tsmin)
100°C
- Temperature Mix (Tsmax)
150°C
- Time (min to max)(ts)
60-120 seconds
Tsmax to TL
- Ramp-up Rate
Tsmax to TL
- Temperature(TL)
183°C
- Time (tL)
60-150 seconds
Peak Temperature(Tp)
225 +0/-5°C
240 +0/-5°C
Time within 5°C of actual Peak
10-30 seconds
10-30 seconds
Temperature(tp)
Ramp-down Rate
6°C/second max.
6 minutes max.
Time 25°C to Peak Temperature
Pb-Free Assembly
Large Body
Small Body
3°C/second max.
150°C
200°C
60-180 seconds
3°C/second max
217°C
60-150 seconds
245 +0/-5°C
250 +0/-5°C
10-30 seconds
20-40 seconds
6°C/second max.
8 minutes max.
Note: All temperatures refer to topside of the package. Measured on the body surface.
Copyright  ANPEC Electronics Corp.
Rev. A.3 - Mar., 2005
11
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APW7058
Reliability test program
Test item
SOLDERABILITY
HOLT
PCT
TST
ESD
Latch-Up
Method
MIL-STD-883D-2003
MIL-STD-883D-1005.7
JESD-22-B, A102
MIL-STD-883D-1011.9
MIL-STD-883D-3015.7
JESD 78
Description
245°C , 5 SEC
1000 Hrs Bias @ 125 °C
168 Hrs, 100 % RH , 121°C
-65°C ~ 150°C, 200 Cycles
VHBM > 2KV, VMM > 200V
10ms , Itr > 100mA
Carrier Tape & Reel Dimension
t
D
P
Po
E
P1
F
W
Ao
D1
Ko
T2
J
C
A
B
T1
SOP-8
A
330±1
Application
SOP-8
F
5.5 ± 0.1
Application
B
62 ± 1.5
C
12.75 +
0.1 5
J
2 + 0.5
D
D1
Po
1.55±0.1 1.55+ 0.25 4.0 ± 0.1
T1
12.4 +0.2
T2
2± 0.2
W
12 + 0.3
- 0.1
P1
2.0 ± 0.1
Ao
6.4 ± 0.1
Bo
5.2± 0.1
P
8± 0.1
E
1.75± 0.1
Ko
t
2.1± 0.1 0.3±0.013
(mm)
Copyright  ANPEC Electronics Corp.
Rev. A.3 - Mar., 2005
12
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APW7058
Cover Tape Dimensions
Application
SOP- 8
Carrier Width
12
Cover Tape Width
9.3
Devices Per Reel
2500
Customer Service
Anpec Electronics Corp.
Head Office :
5F, No. 2 Li-Hsin Road, SBIP,
Hsin-Chu, Taiwan, R.O.C.
Tel : 886-3-5642000
Fax : 886-3-5642050
Taipei Branch :
7F, No. 137, Lane 235, Pac Chiao Rd.,
Hsin Tien City, Taipei Hsien, Taiwan, R. O. C.
Tel : 886-2-89191368
Fax : 886-2-89191369
Copyright  ANPEC Electronics Corp.
Rev. A.3 - Mar., 2005
13
www.anpec.com.tw
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