MB39A112 Datasheet, PDF (6/35 Pages) Fujitsu Component Limited. – 3-ch DC/DC Converter IC

MB39A112
s ELECTRICAL CHARACTERISTICS
(VCC = VCCO = 12 V, Ta = + 25 °C)
Parameter
Sym-
bol
Pin No.
Conditions
Value
Unit
Min Typ Max
Undervoltage Threshold voltage
VTH
4 VCC =
Lockout
Protection
Circuit Block ^{Hysteresis width}
VHYS
4

[UVLO]
6.35 6.55 6.75 V

0.15

V
Short-circuit
Protection
Circuit Block
[SCP]
Threshold voltage
Input source current
Reset voltage
VTH
ICSCP
VRST
14

14

4 VCC =
0.67 0.72 0.77 V
− 1.4 − 1.0 − 0.6 µA
6.2
6.4
6.6 V
Triangular
Wave
Oscillator
Block [OSC]
Oscillation
frequency
fosc
17 to 19
CT = 100 pF,
RT = 10 kΩ
1080 1200 1320 kHz
Soft-start
Block
[CS1, CS2,
Charge current
ICS
1, 10,
11

CS3]
− 14 − 10 − 6 µA
Threshold voltage
VTH
2 FB1 = 2.25 V
0.99 1.00 1.01 V
Input bias current
IB
2 − INE1 = 0 V
− 250 − 63
 nA
Voltage gain
AV
3 DC
60
100
 dB
Error Amp
Block (CH1)
[Error Amp1]
Frequency band
width
Output voltage
BW
3 AV = 0dB
VOH
3

VOL
3


1.5*
 MHz
3.2
3.4

V

40
200 mV
Output source current ISOURCE 3 FB1 = 2.25 V

−2
− 1 mA
Output sink current
ISINK
3 FB1 = 2.25 V
150 250
 µA
Threshold voltage
VTH 9, 12 FB2 = FB3 = 2.25 V 1.218 1.230 1.242 V
Input bias current
IB 9, 12 − INE2 = − INE3 = 0 V − 250 − 63
 nA
Error Amp
Block
(CH2, CH3)
[Error Amp2,
Error Amp3]
Voltage gain
Frequency band
width
Output voltage
AV 8, 13 DC
BW 8, 13 AV = 0 dB
VOH 8, 13

VOL 8, 13

60
100
 dB

1.5*
 MHz
3.2
3.4

V

40
200 mV
Output source current ISOURCE 8, 13 FB2 = FB3 = 2.25 V

−2
− 1 mA
Output sink current
ISINK 8, 13 FB2 = FB3 = 2.25 V 150
250
 µA
* : Standard design value
(Continued)
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