MB3870 Fujitsu Media Devices, MB3870 Datasheet - Page 8

• Manufacturer Part Number: MB3870
• Description: Pentium II DC/DC Converter IC
• Manufacturer: Fujitsu Media Devices

8
MB3870
* : Standard design value
Reference
voltage block
(Ref)
Under voltage
lockout circuit
block (UVLO)
Soft start block
(CS)
Short circuit
protection
comparator block
(SCP)
Triangular wave
oscillator block
(OSC)
Error amplifier
block (Error
Amp.)
ELECTRICAL CHARACTERISTICS
Parameter
Output voltage
Output voltage
temperature
regulation
Input stability
Load stability
Short circuit output
current
Threshold voltage
Hysteresis voltage
Reset voltage
Charge current
Threshold voltage
Input source current I
Short detection
interval
Oscillator frequency f
Frequency
temperature
regulation
Threshold voltage
VTH temperature
regulation
Input bias current
Voltage gain
Frequency
bandwidth
Output voltage
Output source
current
Output sink current
V
/V
Line
Load
I
V
V
V
I
V
t
V
V
I
A
BW
V
V
I
I
Symbol
OS
CS
CSCP
SCP
OSC
B
SOURCE
SINK
V
V
f/fdt
V
REF
TH
H
RST
TH
TH1
TH2
OH
OL
REF
REF
T
/V
T
8, 11 R
8, 11 Ta = –30°C to +85°C*
Pin
no.
24
24
24
24
24
22
22
4
4
4
4
4
6
6
6
5
6
6
6
6
6
6
V
Ta = –30 C to +85 C*
V
I
VREF = 1 V
V
CSCP = 2200 pF
FB = 1.6 V,
VD4 to VD0 = 00101
FB = 1.6 V,
VD4 to VD0 = 11010
Ta = –30°C to +85°C*
–IN = 0 V
DC
A
FB = 1.6 V
FB = 1.6 V
O
V
REF
CC
CC
T
= 0 mA to –1 mA
= 130 k
= 0 dB*
= 4.6 V to 18 V
=
= 0 mA
Condition
—
—
—
—
—
—
—
3.465 3.500 3.535
1.7784
2.4700
–200
Min.
–2.8
0.63
–2.8
0.50
2.18
–20
180
3.4
1.7
3.0
60
—
—
—
—
—
—
—
—
—
(Ta = +25 C, V
Value
1.8000
2.5000
Typ.
0.18
–2.0
0.68
–2.0
0.75
12.0
–10
200
–50
100
800
–90
0.5
0.5
3.7
2.1
3.5
0.8
1
3
1
1.8216
2.5300
Max.
0.21
–1.2
0.73
–1.2
1.34
220
–45
4.0
1.0
—
10
10
–3
—
—
—
—
—
—
—
—
(Continued)
CC
= 5 V)
Unit
kHz
kHz
mV
mV
mA
mA
ms
nA
dB
%
%
%
V
V
V
V
V
V
V
V
V
A
A
A