MB3889 Fujitsu Microelectronics, Inc., MB3889 Datasheet - Page 8

• Manufacturer Part Number: MB3889
• Description: 2-channel Dc/dc Converter Ic With Overcurrent Protection Symmetrical-phase Type
• Manufacturer: Fujitsu Microelectronics, Inc.

8
MB3889
*: Standard design value
1. Reference
Voltage
Block [REF]
2. Bias Voltage
Block [VB]
3. Triangular
Waveform
Oscillator
Block
4. Undervolt-
age (VCC)
Lockout Circuit
Block [UVLO]
5. Short-circuit
Protection
Circuit Block
[SCP]
6. Overcurrent
Protection
Circuit Block
[OCP]
7. Overvoltage
Protection
Circuit Block
[OVP]
8.Protection
Status
Output Cirsuit
Block
[PWRGOOD]
9. Soft-start
Circuit Block
[CS]
ELECTRICAL CHARACTERISTICS
[OSC]
Parameter
Output voltage
Input stability
Load stability
Short-circuit
output current
Output voltage
Oscillation
frequency
Frequency/
temperature
variation
Threshold
voltage
Hysteresis
width
Threshold
voltage
Input source
current
Reset voltage
ILIM terminal
input current
Offset voltage
Threshold
voltage
Input bias
current
Output leakage
current
Output “L” level
voltage
Charge current
Symbol
Load
I
V
V
Line
V
I
f
f
V
V
V
V
V
CSCP
I
V
f
LEAK
I
V
OSC
OSC
V
I
OSC
LIM
I
REF
REF
OS
RST
CS
REF
TH
TH
TH
B
OL
IO
B
H
/
/
17, 29 RT
17, 29 Ta
23, 25 RT
23, 25
1, 15
1, 15
3, 13
Pin
No.
22
11
11
12
12
8
8
8
8
8
8
8
8
Ta
Ta
VCC
VREF
VREF
VREF
VREF
PWRGOOD
PWRGOOD
INE
INE
0 C to
0 C to
47 k
47 k
Conditions
25 C
5.5 V to 18 V
0 V
0 mA to
0 V
(VCC
85 C
85 C
5 V
1 mA
12 V, VB
1 mA
3.465
0.65
1.35
0 mA, VREF
Min
270
106
5.0
2.6
1.7
730
4.2
40
14
Value
3.500
0.70
1.38
Typ
0.2*
300
118
0.5*
5.1
2.8
2.1
0.1
110
1*
1*
1
3
3.0
20
10
0 mA, Ta
3.535
Max
0.75
1.41
330
130
5.2
3.0
2.5
0.4
10
10
40
(Continued)
1.8
10
6
25 C)
Unit
kHz
mV
mV
mA
mV
nA
V
V
V
V
V
V
V
V
A
A
A
A