MB3800 Datasheet, PDF (9/18 Pages) Fujitsu Component Limited. – Switching Regulator Controller (Low Voltage)

(Continued)
BR/CTL pin current vs. Output source current
–50
–40
V CC = 2 V
–30
V OUT = 0.9 V
T a = +25°C
–20
–10
0
0
–0.4 –0.8 –1.2 –1.6 –2.0
BR/CTL pin current I BR (mA)
BR/CTL pin current vs. Supply current
5.0
V CC = 2 V
T a = +25°C
4.0
3.0
2.0
1.0
0
0
–20
–40
–60
–80 –100
BR/CTL pin current I BR (µA)
Supply voltage vs. Frequency variation ratio
10
C T = 270 pF
R T = 3.0 kΩ
5
Ta = +25°C
0
–5
–10
–15
0 2 4 6 8 10 12 14 16
Supply voltage V CC (V)
MB3800
BR/CTL pin current vs. BR/CTL pin voltage
500
V CC = 2 V
T a = +25°C
400
300
200
100
0
0
–0.4 –0.8 –1.2 –1.6 –2.0
BR/CTL pin current I BR (mA)
Timing resistor vs. Oscillation frequency
1M
500 k
C T = 100 pF
V CC = 2 V
T a = +25°C
200 k
100 k
50 k
C T = 1000 pF
20 k
10 k
C T = 10000 pF
5k
2k
1k 2k
5k
10 k
20 k
Timing resistor R T (Ω)
Ambient temperature vs. Frequency variation ratio
10
V CC = 2 V
C T = 270 pF
5
R T = 3.0 kΩ
0
–5
–10
–15
–40 –20 0
20 40 60
80 100
Ambient temperature T a (°C)
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9