MB3800 Datasheet, PDF (6/21 Pages) Fujitsu Component Limited. – Switching Regulator Controller (Low Voltage)

MB3800
6. Electrical Characteristics
Parameter
Symbol
Condition
Circuit to prevent
Reset voltage
V_R
malfunction at low input
voltage (U.V.L.O.)
Threshold voltage
V_TH
Soft start
Short circuit detection
(S.C.P.)
Sawtooth wave oscil-
lator (OSC)
Error amplifier
Idle period adjustment
section
Charging current
Voltage at soft start
completion
Charging current
Threshold voltage
Oscillation frequency
Frequency input stability
Frequency variation with
temperature
Input threshold voltage
V_T input stability
V_T variation with temper-
ature
Input bias current
Voltage gain
Frequency bandwidth
Maximum output voltage
range
Output source current
Output sink current
Maximum duty cycle
I_CS
V_tS
I_CPC
V_tPC
f_OCS
f_dV
f_dT
V_T
V_TdV
V_TdT
I_B
A_V
BW
V_OM+
V_OM–
I_OM+
I_OM–
t_DUTY
—
V_SCP = 0 V
—
V_SCP = 0 V
—
R_T = 3.0 k, C_T = 270 pF
V_CC = 2 V to 15 V
Ta = –30°C to +85°C
V_FB = 450 mV
V_CC = 2 V to 15 V
Ta = –30°C to +85°C
V_IN = 0 V
—
A_V = 0 dB
—
V_FB = 0.45 V
R_T = 3.0 k, C_T = 270 pF
V_FB = 0.8 V
(VCC = +2 V, Ta = +25°C)
Value
Unit
Min Typ Max
—
—
0.9 V
1.1 1.3 1.5 V
–1.5 –1.0 –0.7 A
0.7 0.8 0.9 V
–1.5 –1.0 –0.7 A
0.7 0.8 0.9 V
400 500 600 kHz
—
2
10
%
—
5
—
%
480 500 520 mV
—
5
20
mV
—
1
—
%
–1.0 –0.2 +1.0 A
70
100 145 V/V
—
6
—
MHz
0.78 0.87 —
V
—
0.05 0.2 V
—
–40 –24 A
24
40
—
A
65
75
85
%
(Continued)
Document Number: 002-08716 Rev. *A
Page 6 of 21