FUJITSU MB39A105 - Manual (Page 6)

MB39A105
6
■ ■ ■ ■ ELECTRICAL CHARACTERISTICS
(VCC
=
3.3 V, Ta
= +
25
°
C)
*: Standard design value.
Parameter Symbol
Pin
No
Conditions
Value
Unit
Min Typ Max
1. Under voltage
lockout
protection circuit
block [UVLO]
Threshold voltage V
TLH
3 VCC
=
1.15 1.35 1.55 V
2. Short-circuit
protection block
[SCP]
Threshold voltage V
TH
2

0.95 1.00 1.05 V
Short-circuit detection time
setting difference voltage
∆
V
CSCP
2

0.15 0.20 0.25 V
Input source current I
CSCP
2 CSCP
=
0.85 V
−
1.76
−
0.88
−
0.44
µ
A
Reset voltage V
RST
3 VCC
=
1.1 1.3 1.5 V
SCPOD terminal output
leak current
I
LEAK
4 SCPOD
=
3.3 V

0 1.0
µ
A
SCPOD terminal output on
resistor
R
ON
4 SCPOD
=
1 mA

50 100
Ω
3. Triangular
wave oscillator
block
[OSC]
Oscillation frequency fosc 5 RT
=
7.5 k
Ω
450 500 550 kHz
Frequency temperature
variation
∆
f
OSC
/
f
OSC
5 Ta
=
0
°
C to
+
85
°
C

1*
 %
4. Soft-start block
[CS]
Charge current I
CS
2 CSCP
=
0 V
−
16
−
11
−
6
µ
A
5. Error amplifier
block [Error Amp]
Threshold voltage V
TH
1 FB
=
0.5 V 0.495 0.5 0.505 V
Input bias current I
B
1
−
INE
=
0 V
−
120
−
30

nA
Voltage gain A
V
8 DC

70*

dB
Frequency band width BW 8 A
V
=
0 dB

1.1*

MHz
Output voltage
V
OH
8

1.17 1.27 1.37 V
V
OL
8
 
40 200 mV
Output source current I
SOURCE
8 FB
=
0.5 V
 −
80
−
50
µ
A
Output sink current I
SINK
8 FB
=
0.5 V 100 300
 µ
A
6. PWM compar-
ator block
[PWM Comp.]
Maximum duty cycle Dtr 5 RT
=
7.5 k
Ω
85 90 95
%
7.Output block
[Drive]
Output source current I
SOURCE
5
OUT
=
0 V,
Duty
≤
5
%
(t
=
1/fosc
×
Duty)
 −
400*

mA
Output sink current I
SINK
5
OUT
=
3.3 V,
Duty
≤
5
%
(t
=
1/fosc
×
Duty)

400*

mA
Output ON resistor
R
OH
5 OUT
= −
15 mA

4.0*
 Ω
R
OL
5 OUT
=
15 mA

3.0 6.0
Ω
8. General block
Standby current I
CCS
3 RT
=
OPEN

0 10
µ
A
Power supply current I
CC
3 RT
=
7.5 k
Ω 
1.2 1.8 mA