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MB3887
8
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ELECTRICAL CHARACTERISTICS
(Ta = +25 °C, VCC = 19 V, VCC (O) = 19 V, VREF = 0 mA)
* : Standard design value.
(Continued)
Parameter
Sym-
bol
Pin
No.
Conditions
Value
Unit
Min Typ Max
1.
Reference
voltage block
[REF]
Output voltage
V
REF1 6Ta = +25 °C 4.967 5.000 5.041 V
V
REF2 6Ta = −10 °C to +85 °C 4.95 5.00 5.05 V
Input stability Line 6 VCC = 8 V to 25 V 310mV
Load stability Load 6 VREF = 0 mA to −1 mA 110mV
Short-circuit output
current
Ios 6 VREF = 1 V −50 −25 −12 mA
2.
Under voltage
lockout protec-
tion circuit
block
[UVLO]
Threshold voltage
V
TLH 18
VCC = VCC (O) ,
VCC =
6.2 6.4 6.6 V
VTHL 18
VCC = VCC (O) ,
VCC =
5.2 5.4 5.6 V
Hysteresis width V
H 18 VCC = VCC (O) 1.0* V
Threshold voltage
V
TLH 6VREF = 2.6 2.8 3.0 V
VTHL 6VREF = 2.4 2.6 2.8 V
Hysteresis width V
H 6 0.2 V
3.
Soft-start block
[SOFT]
Charge current I
CS 22 −14 −10 −6 µA
4.
Triangular
waveform os-
cillator circuit
block
[OSC]
Oscillation
frequency
f
OSC 20 RT = 47 kΩ 260 290 320 kHz
Frequency
temperature
stability
∆f/fdt 20 Ta = −30 °C to +85 °C 1* %
5-1.
Error amplifier
block
[Error Amp1,
Error Amp2]
Input offset voltage V
IO
3, 4,
8, 9
FB1 = FB2 = 2 V 15mV
Input bias current I
B
3, 4,
8, 9
−100 −30 nA
In-phase input
voltage range
V
CM
3, 4,
8, 9
0 VCC − 1.8 V
Voltage gain AV 5, 7 DC 100* dB
Frequency
bandwidth
BW 5, 7 AV = 0 dB 2* MHz
Output voltage
V
FBH 5, 7 4.7 4.9 V
VFBL 5, 7 20 200 mV
Output source
current
I
SOURCE 5, 7 FB1 = FB2 = 2 V −2 −1mA
Output sink current I
SINK 5, 7 FB1 = FB2 = 2 V 150 300 µA