AN8049FHN Datasheet, PDF (13/23 Pages) Panasonic Semiconductor – 1.8-volt 3-channel step-up, step-down, and polarity inverting DC-DC converter control IC

Voltage Regulators
s Application Notes (continued)
[2] Main characteristics
Timing capacitance  Oscillator frequency
1M
100k
R_T = 3 kΩ
R_T = 7.5 kΩ
R_T = 33 kΩ
10k
10p
1n
10n
C_T (F)
f_OSC  Maximum output duty
(R_T = 7.5 kΩ)
95
90
85
Du₃
Du₁ , Du₂
80
75
10k
100k
1M
f_OSC (Hz)
R_B  I_SO(OUT)
0
−10
−20
VCC = 1.8 V
−30
2.4 V
−40
−50
8V
−60
−70
−80
100
14 V
1k
10k
R_B (Ω)
100k
AN8049FHN
f_OSC  Maximum output duty
(R_T = 3 kΩ)
95
90
Du3
85
Du1 , Du2
80
75
10k
100k
1M
f_OSC (Hz)
f_OSC  Maximum output duty
(R_T = 33 kΩ)
95
Du₂
90
Du₃
Du₁
85
80
75
10k
100
90
80
70
60
50
40
30
20
10
0
100
100k
1M
f_OSC (Hz)
R_B  I_SI(OUT)
V_CC = 14 V
1.8 V, 2.4 V
1k
10k
R_B (Ω)
8V
100k
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