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PDF MB39A214A Data sheet ( Hoja de datos )
| Número de pieza | MB39A214A | |
| Descripción | 2ch DC/DC converter IC | |
| Fabricantes | Fujitsu | |
| Logotipo |  |
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FUJITSU SEMICONDUCTOR
DATA SHEET
DS405-00007-1v0-E
ASSP for Power Management Applications
2ch DC/DC converter IC
with PFM/ PWM synchronous rectification
MB39A214A
DESCRIPTION
MB39A214A is a N-ch/ N-ch synchronous rectification type 2ch Buck DC/DC converter IC equipped with
a bottom detection comparator for low output voltage ripple. It supports low on-duty operation to allow
stable output of low voltages when there is a large difference between input and output voltages. It also
allows the high switching frequency setting, enabling the downsized peripheral circuits and low-cost
configuration. MB39A214A realizes ultra-rapid response and high efficiency with built-in enhanced
protection features. It is most suitable for the power supply for ASIC or FPGA core, input/output devices, or
memory.
FEATURES
y High efficiency
y Frequency setting by internal preset function : 310 kHz, 620 kHz, 1 MHz
y High accuracy reference voltage
: ± 0.7% (Ta = + 25 °C)
y VIN Input voltage range
y Output voltage setting range
: 6 V to 28 V
: 0.7 V to 5.3 V
y Possible to select the automatic PFM/PWM selection mode or PWM-fixed mode
y PAF frequency limitation function (Prohibit Audio Frequency) : > 30 kHz (Min)
y Built-in boost diode, external fly-back diode not required
y Built-in discharge FET
y Built-in over voltage protection function
y Built-in under voltage protection function
y Built-in over temperature protection function
y Built-in over current limitation function
y Soft-start circuit without load dependence
y Current sense resistor not required
y Built-in synchronous rectification type output steps for N-ch MOS FET
y Standby current
: 0 µA (Typ)
y Package
: TSSOP24 (4.4 mm°6.5 mm°1.2 mm [Max])
APPLICATIONS
y Digital TV
y Photocopiers
y STB
y BD, DVD players/recorders
y Projectors
etc.
Copyright©2011 FUJITSU SEMICONDUCTOR LIMITED All rights reserved
2011.12
1 page  
MB39A214A
ABSOLUTE MAXIMUM RATINGS
Parameter
Symbol
Condition
Rating
Min Max
Unit
VCC pin input voltage
BST pin input voltage
LX pin input voltage
Voltage between
BST and LX
VVCC
VBST
VLX
VBST-LX
VCC pin
BST1, BST2 pins
LX1, LX2 pins
—
− 0.3
− 0.3
−1
− 0.3
+ 30 V
+ 36 V
+ 30 V
+7 V
EN pin input voltage
Input voltage
Output current
Power dissipation
Storage temperature
VEN
VFB
VVOUT
VILIM
VCS
VFREQ
VMODE
IOUT
PD
TSTG
EN1, EN2 pins
FB1, FB2 pins
VOUT1, VOUT2 pins
ILIM1, ILIM2 pins
CS1, CS2 pins
FREQ pin
MODE pin
DRVH1, DRVH2 pins,
DRVL1, DRVL2 pins
Ta ≤ + 25°C
—
− 0.3
− 0.3
− 0.3
− 0.3
− 0.3
− 0.3
− 0.3
—
—
− 55
+ 30
VB + 0.3
+7
VB + 0.3
VB + 0.3
VB + 0.3
VB + 0.3
60
+ 1282
+ 125
V
V
V
V
V
V
V
mA
mW
°C
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.
DS405-00007-1v0-E
5
5 Page 
MB39A214A
DRVH1 on time vs. Operating ambient temperature
700
650
600 FREQ=GND
550
500
450
400
VCC=12V
VOUT1=1.5V
350
300
FREQ=OPEN
250
200
150 FREQ=VB
100
-40 -20 0 +20 +40 +60 +80 +100
Operating ambient temperature Ta (°C)
DRVH1 minimum on time vs. Input voltage
250
Ta = + 25°C
200
FREQ=GND
150
100 FREQ=OPEN
50
0
5
180
FREQ=VB
10 15 20
Input voltage VIN (V)
25
DRVH1 minimum on time vs.
Operating ambient temperature
30
160
FREQ=GND
140
120
VCC=12V
VOUT1= 0 V
100
FREQ=OPEN
80
60
FREQ=VB
40
-40 -20 0 +20 +40 +60 +80 +100
Operating ambient temperature Ta (°C)
DRVH2 on time vs. Operating ambient temperature
500
450 FREQ=GND
400
350 VCC=12V
300 VOUT2=1.5V
250 FREQ=OPEN
200
150
100 FREQ=VB
50
-40 -20 0 +20 +40 +60 +80 +100
Operating ambient temperature Ta (°C)
DRVH2 minimum on time vs. Input voltage
200
Ta = + 25°C
150
FREQ=GND
100
FREQ=OPEN
50
FREQ=VB
0
5
140
10 15 20
Input voltage VIN (V)
25
DRVH2 minimum on time vs.
Operating ambient temperature
30
120
FREQ=GND
100
VCC=12V
80 VOUT2=0 V
FREQ=OPEN
60
40 FREQ=VB
20
-40 -20 0 +20 +40 +60 +80 +100
Operating ambient temperature Ta (°C)
DS405-00007-1v0-E
11
11 Page | ||
| Páginas | Total 30 Páginas | |
| PDF Descargar | [ Datasheet MB39A214A.PDF ] | |
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