BD9305AFVM Datasheet, PDF (2/15 Pages) Rohm – Single-output Step-up,High-efficiency Switching Regulator(Controller Type)

BD9306AFVM, BD9305AFVM
Technical Note
Electrical Characteristics (Unless otherwise specified Ta=25℃,V_CC=12V,CT=200pF,RT=20kΩ)
Parameter
Limit
Symbol
Unit
Min
Typ
Max
Conditions
【Triangular Waveform Oscillator Block】
Oscillating frequency
FOSC
165
220
275
kHz Vcc=5V
Charge Threshold Voltage
VOSC^＋
0.80
0.85
0.90
V
Discharge Threshold Voltage
VOSC^－
0.20
0.25
0.30
V
【Under-voltage lockout protection circuit】
Threshold Voltage
VUT
3.5
－
4.2
V
【Error amp Block】
Feed Back Voltage
VFB
1.230 1.250 1.270
V
Input Bias Current
IIB
－
0.05
1
µA FB=1.5V
COMP Sink Current
IOI
35
50
65
µA FB=1.5V COMP=1.25V
COMP Source Current
IOO
35
50
65
µA FB=1.0V COMP=1.25V
【Gate Drive Block】
ON Resistance
Ron
－
5
－
Ω
Gate Drive Voltage L
VGDL
－
0
0.5
V
No Load
Gate Drive Voltage H
VGDH Vcc-0.5 Vcc
－
V
No Load
MAX Duty (BD9305AFVM)
MDT
－
－
100
% Vcc=5V
MAX Duty (BD9306AFVM)
MDT
－
83
－
% Vcc=5V
【Control Block】
ON Voltage
VON
2
－
－
V
OFF Voltage
VOFF
－
－
0.3
V
ENB Sink Current
IENB
40
60
90
µA ENB=5V
【Soft Start Block】
Soft Start Time
TS
－
10
－
ms
【Timer Latch Protection Circuit】
Latch Detection COMP Voltage
VLC
1.5
1.7
1.9
V
Latch Delay OSC Count Number
CNT
－
2200
－ COUNT
Latch Delay Time
DLY
－
10
－
ms
【Overall】
Standby Current
ISTB
－
0
10
µA ENB=0FF
Average Consumption Current
ICC
1.0
1.5
2.5
mA No Switching
*This product is not designed for protection against radio active rays.
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2009.05 - Rev.A