FUJITSU MB3776APNF

FUJITSU SEMICONDUCTOR
DATA SHEET
ASSP
DS04-27201-4E
For Power Supply Applications
Switching Regulator Controller
MB3776A
■ DESCRIPTION
MB3776A is a PWM system switching regulator controller. Because of its low operating supply voltage and powerdown, the MB3776A is ideal for use in DC/DC converters for battery-powered portable equipment.
■ FEATURES
•
•
•
•
•
•
Wide supply voltage range: (2 V to 15 V)
Wide oscillation frequency range, high-frequency oscillation: (10 kHz to 500 kHz)
Push-pull output. Drive current set with external resistor
Bulit-in idle period circuit
Internally set error amplifier gain, few external components
Bulit-in power-down function
■ PACKAGES
8-pin Plastic DIP
8-pin Plastic SOP
8-pin Plastic SOP
8-pin Plastic SSOP
(DIP-8P-M01)
(FPT-8P-M01)
(FPT-8P-M02)
(FPT-8P-M03)
MB3776A
■ PIN ASSIGNMENT
(TOP VIEW)
-IN
1
8
FB
CLT
2
7
OSC
VCC
3
6
GND
IB
4
5
OUT
(DIP-8P-M01)
(FPT-8P-M01)
(FPT-8P-M02)
(FPT-8P-M03)
2
MB3776A
■ BLOCK DIAGRAM
VCC
OSC
3
7
IS ∝ IB
0.6 V
CTL
Reference
voltage
2
1.25 V
Saw-tooth
waveform
0.1 V
0.1 V
Internal bias &
reference voltage
Error Amp.
-IN
1
-
Is
30 kΩ
5
OUT
4
IB
P. W. M. Comp
-
36 kΩ
+
+
X 100
+
Output drive
control
470 Ω
0.5 V
FB
D. T. C. ( 0.6 V)
8
6
GND
3
MB3776A
■ ABSOLUTE MAXIMUM RATINGS
(Ta = +25°C)
Parameter
Power supply voltage
Error amp. input voltage
Output source current
Output sink current
Power dissipation
Symbol
Condition
VCC
Rating
Unit
Min
Max
—
—
16
V
VI
—
–0.3
+10
V
ISOURCE
—
—
–50
mA
ISINK
—
—
50
mA
Ta ≤ +25°C (DIP)
—
550
mW
EIAJ
—
*570
mW
JEDEC
—
*430
mW
Ta < +25°C (SSOP)
—
*580
mW
PD
Ta ≤ +25°C (SOP)
Operating temperature
Top
—
–30
+75
°C
Storage temperature
Tstg
—
–55
+125
°C
*: The packages are mounted on the epoxy board (10 cm × 10 cm × 1.5 mm)
WARNING: Semiconductor devices can be permanently damaged by application of stress (voltage, current,
temperature, etc.) in excess of absolute maximum ratings. Do not exceed these ratings.
■ RECOMMENDED OPERATING CONDITIONS
Parameter
Symbol
Value
Unit
Min
Typ
Max
VCC
2.0
—
15
V
VI
–0.2
—
1.0
V
ISOURCE
–40
—
—
mA
Output sink current
ISINK
—
—
40
mA
Phase compensation capacitor
CP
—
0.1
—
µF
Timing capacitor
CT
100
1000
10000
pF
Timing resistor
RT
1.0
3.0
5.0
kΩ
Oscillator frequency
fOSC
10
200
500
kHz
Operating temperature
TOP
–30
25
75
°C
Power supply voltage
Error amp. input voltage
Output source current
WARNING: The recommended operating conditions are required in order to ensure the normal operation of the
semiconductor device. All of the device’s electrical characteristics are warranted when the device is
operated within these ranges.
Always use semiconductor devices within their recommended operating condition ranges. Operation
outside these ranges may adversely affect reliability and could result in device failure.
No warranty is made with respect to uses, operating conditions, or combinations not represented on
the data sheet. Users considering application outside the listed conditions are advised to contact their
FUJITSU representatives beforehand.
4
MB3776A
■ ELECTRICAL CHARACTERISTICS
1. Reference Section and Error Amp. Section
(Ta = +25°C, VCC = 3 V)
Parameter
Symbol
Condition
Value
Unit
Min
Typ
Max
VFB = 450 mV
487
507
527
mV
VTdV1
VCC = 2.0 V to 6.0 V
–5
—
5
mV
VTdV2
VCC = 6.0 V to 15 V
–5
—
5
mV
VT temp. stability
VTdT
Ta = –30 °C to +75 °C
–3
—
3
%
Input bias current
IB
–1.0
–0.2
1.0
µA
Voltage gain
AV
70
100
145
V/V
Frequency band width
BW
—
6
—
MHz
Input threshold voltage
VT input stability
VT
VIN = 0 V to 0.6 V
—
AV = 0 dB
2. Saw-tooth Waveform Oscillator Section
(Ta = +25°C, VCC = 3 V)
Parameter
Symbol
Condition
Value
Unit
Min
Typ
Max
160
200
240
kHz
Oscillator frequency
fOSC
RT = 3.0 kΩ
CT = 1000 pF
Frequency input stability
fdV
VCC = 2.0 V to 15 V
—
±2
—
%
Frequency temp. stability
fdT
Ta = –30°C to +75°C
—
±10
—
%
3. Under Lockout Protection
(Ta = +25°C, VCC = 3 V)
Parameter
Threshold voltage
Symbol
Condition
VTH
—
Value
Min
Typ
Max
—
1.4
—
Unit
V
4. Dead-time Control Section
(Ta = +25°C, VCC = 3 V)
Parameter
Max duty cycle
Symbol
tDUTY
Condition
CT = 1000 pF
RT = 3.0 kΩ
VFB = 0.9 V
Value
Min
Typ
Max
60
70
85
Unit
%
5
MB3776A
5. Output Section
(Ta = +25°C, VCC = 3 V)
Parameter
Output source current
Symbol
ISOURCE
Condition
Value
Unit
Min
Typ
Max
RB = 820 Ω, VO = 1 V
–40
–30
–20
mA
Output sink current
ISINK
RB = 820 Ω, VO = 0.3 V
30
60
—
mA
High-level output voltage
VOH
RB = 820 Ω, VO = 7 V
IO = –15 mA
5.5
6.0
—
V
Output voltage
VOL
VCTL = VCC, IO = 3 µA
—
0.1
0.2
V
6. Control Section
(Ta = +25°C, VCC = 3 V)
Parameter
Symbol
Condition
Input off condition
IOFF
Input on condition
ION
Control terminal current
ICTL
Value
Unit
Min
Typ
Max
—
–300
—
—
µA
—
—
—
–700
µA
–1.3
–1
—
mA
VCC = 7 V, VCTL = 0 V
7. All Device
(Ta = +25°C, VCC = 3 V)
Parameter
6
Symbol
Condition
Value
Min
Typ
Max
Unit
Stand by current
ICCS
VCTL = VCC or
CTL terminal open
—
—
0.5
µA
Average supply current
ICC
ICTL = –700 µA
RB = 820 Ω
—
4.5
8
mA
MB3776A
■ MEASURMENT CIRCUIT
CP
MB3776A
TEST
INPUT
1
8
CTL
2
7
VCC = 3 V
3
6
4
5
CT
RT
OUTPUT
ISOURCE
RB
CT = 1000 pF
CP = 0.1 µF
RT = 3 kΩ
RB =820 Ω
ISOURCE 25000/RB (mA)
■ DIAGRAM
FB Terminal Waveform
Saw-tooth Waveform
Output
0V
Output Terminal Waveform
0 mA
CTL Input Current
ICTL
Power Supply Voltage
VCC
0V
7
MB3776A
Output bias current vs. Output source current
-50
VCC = 2 V
Ta = +25˚C
-40
-30
-20
-10
Output bias current vs. Output bias voltage
1.0
Output bias voltage VB (V)
Output source current ISOURCE (mA)
■ TYPICAL CHARACTERISTIC
VCC = 2 V
Ta = +25˚C
0.8
0.6
0.4
0.2
0
0
-100 -200 -300 -400 -500 -600 -700
0
-100 -200 -300 -400 -500 -600 -700
0
Output bias current IB (mA)
Output bias current IB (mA)
"L" Level output
"H" Level output
2.0
VCC = 2 V
RB = 820 Ω
Ta = +25˚C
"H" Level output voltage VO (V)
"L" Level output voltage VO (mV)
200
100
VCC = 2 V
RB = 820 Ω
Ta = +25˚C
1.0
0.0
0
0
2
4
6
8
0
10 12 14 16 18 20
"L" Level output current IO (mA)
-6
-12
-18
-24
"H" Level output current IO (mA)
Timing resistor vs. Oscillator frequency
Ambient temp. vs. Oscillator frequency
2M
210
500 k
VCC = 3 V
RB = 820 Ω
Ta = +25˚C
100 k
CT = 100 pF
200
VCC = 2 V
RB = 820 Ω
CT = 1000 pF
RT = 3 kΩ
190
180
170
160
Oscillator frequency fOSC (Hz)
1M
Oscillator frequency fOSC (kHz)
-30
50 k
CT =
1000 pF
10 k
5k
CT =
10000 pF
150
-30 -20
0
20
40
Ambient temp. Ta (˚C)
60
75
1k
1k
5 k 10 k
50 k 100 k
Timing resistor RT (Ω)
500 k
(Continued)
8
MB3776A
(Continued)
Control terminal voltage vs.
Control terminal current
VCC = 2 V
Ta = +25˚C
VCC = 7 V
Ta = +25˚C
-1.0
Control terminal current ICTL (mA)
Control terminal current ICTL (mA)
Control terminal voltage vs.
Control terminal current
-1.0
-0.5
0
-0.5
0
0.0
0.4
0.8
1.2
1.6
Control terminal voltage VCTL (V)
2.0
0
2
4
6
8
10
Control terminal voltage VCTL (V)
Power supply voltage vs. Input on voltage
10
Ta = +25˚C
Inpurt on current VCTL (V)
8
6
4
2
0
0
2
4
6
8
10
Power supply voltage VCC (V)
9
MB3776A
■ APPLICATION EXAMPLE
18 kΩ
10 µH
10 µH
VIN (+3 V)
VO+ (+5 V)
+
4.7 µF
-
10 µF
1
2
CTL
+
+
-
-
+
+
-
-
10 µF
8
1000 pF
7
0.1 µF
3 kΩ
3
6
4
5
10 µF
10 µF
VO- (-5 V)
10 µH
2 kΩ
820 Ω
Synchronization
To synchronize MB3776A controllers, the OSC terminal of each IC is shared and the same specified capacitor
and resistor used on a signal IC application is connected for self-excitation oscillation. The CTL terminal controls
power on/off of each IC.
OUT 1
CT
RT
MB3776A
OUT 2
MB3776A
OUT 3
MB3776A
VCC
10
MB3776A
■ NOTES ON USE
• Take account of common impedance when designing the earth line on a printed wiring board.
• Take measures against static electricity.
- For semiconductors, use antistatic or conductive containers.
- When storing or carrying a printed circuit board after chip mounting, put it in a conductive bag or container.
- The work table, tools and measuring instruments must be grounded.
- The worker must put on a grounding device containing 250 kΩ to 1 MΩ resistors in series.
• Do not apply a negative voltage
- Applying a negative voltage of −0.3 V or less to an LSI may generate a parasitic transistor, resulting in
malfunction.
■ ORDERING INFORMATION
Part number
Package
MB3776A-P
8-pin Plastic DIP
(DIP-8P-M01)
MB3776APF
8-pin Plastic SOP
(FPT-8P-M01)
MB3776APNF
8-pin Plastic SOP
(FPT-8P-M02)
MB3776APFV
8-pin Plastic SSOP
(FPT-8P-M03)
Remarks
11
MB3776A
■ PACKAGE DIMENSIONS
8-pin Plastic DIP
(DIP-8P-M01)
+0.40
9.40 –0.30
+.016
.370 –.012
6.20±0.25
(.244±.010)
1 PIN INDEX
0.51(.020)MIN
4.36(.172)MAX
0.25±0.05
(.010±.002)
3.00(.118)MIN
0.46±0.08
(.018±.003)
+0.30
0.99 –0
+.012
.039 –0
+0.35
0.89 –0.30
+.014
.035 –.012
C
1994 FUJITSU LIMITED D08006S-2C-3
+0.30
1.52 –0
+.012
.060 –0
7.62(.300)
TYP
15°MAX
2.54(.100)
TYP
Dimensions in mm (inches) .
Note : The values in parentheses are reference values.
(Continued)
12
MB3776A
(Continued)
Note 1) *1 : These dimensions include resin protrusion.
Note 2) *2 : These dimensions do not include resin protrusion.
Note 3) Pins width and pins thickness include plating thickness.
Note 4) Pins width do not include tie bar cutting remainder.
8-pin Plastic SOP
(FPT-8P-M01)
+0.25
+.010
+0.03
*1 6.35 –0.20 .250 –.008
0.17 –0.04
+.001
8
.007 –.002
5
*2 5.30±0.30 7.80±0.40
(.209±.012) (.307±.016)
INDEX
Details of "A" part
+0.25
2.00 –0.15
+.010
.079 –.006
1
1.27(.050)
"A"
4
0.47±0.08
(.019±.003)
0.13(.005)
(Mounting height)
0.25(.010)
0~8˚
M
0.50±0.20
(.020±.008)
0.60±0.15
(.024±.006)
+0.10
0.10 –0.05
+.004
.004 –.002
(Stand off)
0.10(.004)
C
2002 FUJITSU LIMITED F08002S-c-6-7
Dimensions in mm (inches) .
Note : The values in parentheses are reference values.
(Continued)
13
MB3776A
Note 1) *1 : These dimensions include resin protrusion.
Note 2) *2 : These dimensions do not include resin protrusion.
Note 3) Pins width and pins thickness include plating thickness.
Note 4) Pins width do not include tie bar cutting remainder.
8-pin Plastic SOP
(FPT-8P-M02)
+0.25
+.010
+0.03
*1 5.05 –0.20 .199 –.008
0.22 –0.07
+.001
.009 –.003
8
5
*2 3.90±0.30 6.00±0.40
(.154±.012) (.236±.016)
Details of "A" part
45˚
1.55±0.20
(Mounting height)
(.061±.008)
0.25(.010)
0.40(.016)
1
"A"
4
1.27(.050)
0.44±0.08
(.017±.003)
0.13(.005)
0~8˚
M
0.50±0.20
(.020±.008)
0.60±0.15
(.024±.006)
0.15±0.10
(.006±.004)
(Stand off)
0.10(.004)
C
2002 FUJITSU LIMITED F08004S-c-4-7
Dimensions in mm (inches) .
Note : The values in parentheses are reference values.
(Continued)
14
MB3776A
(Continued)
Note 1) *1 : These dimensions include resin protrusion.
Note 2) *2 : These dimensions do not include resin protrusion.
Note 3) Pins width and pins thickness include plating thickness.
Note 4) Pins width do not include tie bar cutting remainder.
8-pin Plastic SSOP
(FPT-8P-M03)
+0.03
*1 3.50±0.10(.138±.004)
0.17 –0.04
+.001
8
.007 –.002
5
*2 4.20±0.10
6.20±0.20
(.165±.004) (.244±.008)
INDEX
Details of "A" part
+0.20
1.25 –0.10
+.008
.049 –.004
(Mounting height)
0.25(.010)
1
"A"
4
0.80(.031)
0.37±0.08
(.015±.003)
0.10(.004)
0~8˚
M
0.50±0.20
(.020±.008)
0.60±0.15
(.024±.006)
0.10±0.10
(.004±.004)
(Stand off)
0.10(.004)
C
2002 FUJITSU LIMITED F08005S-c-3-5
Dimensions in mm (inches) .
Note : The values in parentheses are reference values.
15
MB3776A
FUJITSU LIMITED
All Rights Reserved.
The contents of this document are subject to change without notice.
Customers are advised to consult with FUJITSU sales
representatives before ordering.
The information, such as descriptions of function and application
circuit examples, in this document are presented solely for the
purpose of reference to show examples of operations and uses of
Fujitsu semiconductor device; Fujitsu does not warrant proper
operation of the device with respect to use based on such
information. When you develop equipment incorporating the
device based on such information, you must assume any
responsibility arising out of such use of the information. Fujitsu
assumes no liability for any damages whatsoever arising out of
the use of the information.
Any information in this document, including descriptions of
function and schematic diagrams, shall not be construed as license
of the use or exercise of any intellectual property right, such as
patent right or copyright, or any other right of Fujitsu or any third
party or does Fujitsu warrant non-infringement of any third-party’s
intellectual property right or other right by using such information.
Fujitsu assumes no liability for any infringement of the intellectual
property rights or other rights of third parties which would result
from the use of information contained herein.
The products described in this document are designed, developed
and manufactured as contemplated for general use, including
without limitation, ordinary industrial use, general office use,
personal use, and household use, but are not designed, developed
and manufactured as contemplated (1) for use accompanying fatal
risks or dangers that, unless extremely high safety is secured, could
have a serious effect to the public, and could lead directly to death,
personal injury, severe physical damage or other loss (i.e., nuclear
reaction control in nuclear facility, aircraft flight control, air traffic
control, mass transport control, medical life support system, missile
launch control in weapon system), or (2) for use requiring
extremely high reliability (i.e., submersible repeater and artificial
satellite).
Please note that Fujitsu will not be liable against you and/or any
third party for any claims or damages arising in connection with
above-mentioned uses of the products.
Any semiconductor devices have an inherent chance of failure. You
must protect against injury, damage or loss from such failures by
incorporating safety design measures into your facility and
equipment such as redundancy, fire protection, and prevention of
over-current levels and other abnormal operating conditions.
If any products described in this document represent goods or
technologies subject to certain restrictions on export under the
Foreign Exchange and Foreign Trade Law of Japan, the prior
authorization by Japanese government will be required for export
of those products from Japan.
F0309
 FUJITSU LIMITED Printed in Japan