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PDF MB39A103 Data sheet ( Hoja de datos )
| Número de pieza | MB39A103 | |
| Descripción | 4-Channel DC/DC Converter IC | |
| Fabricantes | Fujitsu | |
| Logotipo |  |
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FUJITSU SEMICONDUCTOR
DATA SHEET
DS04-27230-3E
ASSP For Power Manegement Applications
(DC/DC Converter for DSC/Camcorder)
4-ch DC/DC Converter IC
for low voltage
MB39A103
■ DESCRIPTION
The MB39A103 is a 4-channel DC/DC converter IC using pulse width modulation (PWM). This IC is ideal for up
conversion, down conversion, and up/down conversion.
Achievement of low voltage start-up (1.7 V or more) enables operation from low voltage.
4ch is built in TSSOP-30P/package. Each channel can be controlled, and soft-start.
This is an ideal power supply for high-performance portable devices such as digital still cameras.
This product is covered by US Patent Number 6,147,477.
■ FEATURES
• Supports for down-conversion and up/down Zeta conversion (CH1)
• Supports for up-conversion and up/down Sepic conversion (CH2 to CH4)
• Low voltage start-up (CH4): 1.7 V
• Power supply voltage range : 2.5 V to 11 V
• Reference voltage : 2.0 V ± 1 %
• Error amplifier threshold voltage : 1.24 V ± 1.5 %
• Built-in totem-pole type output for MOS FET
• Built-in soft-start circuit independent of loads
• High-frequency operation capability: 1.5 MHz (Max)
• External short-circuit detection capability by −INS terminal
■ PACKAGES
30-pin plastic TSSOP
32-pad plastic BCC
(FPT-30P-M04)
www.DataSheet4U.com
(LCC-32P-M15)
www.DataSheet4U.com
1 page  
MB39A103
■ BLOCK DIAGRAM
Threshold voltage
−INE1
29
10
accuracy ±1.5%
µAVREF
Error
− Amp1
CS1 30
++
1.24 V L priority
FB1 28
DTC1 27
Threshold voltage
−INE2
2
10
accuracy
µAVREF
−
±1.5%
Error
Amp2
CS2 1
++
FB2 3
1.24 V
L priority
DTC2 4
Threshold voltage
accuracy ±1.5%
−INE3
14
10
µAVREF
Error
− Amp3
CS3 15
++
FB3 13
1.24 V
L priority
DTC3 12
Threshold voltage
−INE4
17
10
accuracy ±1.5%
µAVREF
Error
− Amp4
CS4 16
++
Short detection
signal
(L: at short)
FB4 18
1.24 V
L priority
DTC4 19
VREF
100 kΩ
SCP
Comp.
−INS 20
−
+
1V
SCP
L priority
PWM
++Comp.1
−
CH1
Drive1
Pch
26 VCCO
25 OUT1
IO = 130 mA
at VCCO = 4 V
L priority
PWM
++Comp.2
−
CH2
Drive2
Nch
24 OUT2
IO = 130 mA
at VCCO = 4 V
L priority
PWM
++Comp.3
−
CH3
Drive3
Nch
23 OUT3
IO = 130 mA
at VCCO = 4 V
L priority
PWM
++Comp.4
−
CH4
Drive4
Nch
22 OUT4
IO = 130 mA
at VCCO = 4 V
21 GNDO
H:
at SCP
Error Amp Power Supply
SCP Comp. Power Supply
CSCP 11
0.9 V
0.4 V
OSC
89
RT CT
5 VCC
UVLO2
bias
Error Amp Reference
1.24 V
UVLO1
Accuracy
±1%
VREF
Power
VR1 ON/OFF 6 CTL
CTL
H:UVLO
release 2.0 V
7
H : ON (Power/ ON)
10 L : OFF (Standby mode)
VREF
GND
VTH = 1.4 V
5
5 Page 
MB39A103
(Continued)
Error Amplifier Voltage Gain, Phase vs. Frequency
40
30
20
10
0
−10
−20
−30
−40
100
TA = +25 °C
VCC = 4 V
180
AV
ϕ 90
0
−90
−180
1 k 10 k 100 k 1 M 10 M
Frequency f (Hz)
2.48 V
240 kΩ
10 kΩ
1 µF
+
IN
10 kΩ
−INE1
29
2.4 kΩ
30
CS1
−
+
+
28
OUT
1.5 V 1.24 V
Error Amp1
the same as other channels
Power Dissipation vs.
Operating Ambient Temperature
(TSSOP-30P)
1600
1400
1390
1200
1000
800
600
400
200
0
−40 −20 0
20 40 60 80 100
Operating ambient temperature TA (°C)
Power Dissipation vs.
Operating Ambient Temperature
(BCC-32P)
1000
980
800
600
400
200
0
−40 −20 0
20 40 60 80 100
Operating ambient temperature TA (°C)
11
11 Page | ||
| Páginas | Total 30 Páginas | |
| PDF Descargar | [ Datasheet MB39A103.PDF ] | |
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