ROHM BD63536FJ Technical data
Large Current External FET Controller Type Switching Regulators
Step-down,High-frequency
Switching Regulator (Controller type)
BD63536FJ
No.09028EAT09
●Description
The BD63536FJ is a gate direct drive switching regulator operational at a power supply voltage from 3V. This regulator uses
a compact package SOP-J8 and operates as a switching regulator for the voltage control type of step-down DC/DC
converter. The regulator features reliable design with 1% reference voltage accuracy, built-in current limit function (4%),
and a variety of built-in protection circuits.
●Features
1) Gate direct drive available (External Pch FET, Vcc-5.4V)
2) Built-in current limit function (150mV4%)
3) Built-in gate-off function
4) Error amplifier reference voltage (1.25V1%)
5) Built-in soft start
6) 2.5V regulator output
7) External oscillation frequency variable
8) Built-in thermal shutdown circuit
●Applications
Laser beam printers, MFPs, PPCs, etc.
●Absolute maximum ratings (Ta25C)
Item Symbol Rating Unit
Power supply voltage VCC -0.2 to 32.0 V
Current detection pin VCS -0.2 to 32.0 V
VCC-VCS potential difference VCC-VCS -0.2 to 5.0 V
Output current (DC) I
Output current (peak) I
30*1 mA
OUT
200*2 mA
OUTPEAK
Power dissipation 1 Pd1 563 *3 mW
Power dissipation 2 Pd2 675 *4 mW
Operating temperature range T
Storage temperature range T
Junction temperature T
*1 Should not exceed Pd value.
*2 Should not exceed Pd value when Pulse width tw100µs and Duty50%.
*3 Ratings for the IC alone. To use the IC at temperatures over Ta25C, derate power rating by 4.5mW/C.
*4 Mounted on a glass epoxy of 70 mm 70 mm 1.6 mm. To use the IC at temperatures over Ta25C, derate power rating by 5.4mW/C.
GATE switching waveform
Below 200mA
-25 to 85 °C
opr
-55 to 150 °C
stg
150 °C
jmax
Duty50%
Below 100s
●Operating conditions (Ta25 to 85C)
Item Symbol
Min. Typ. Max.
Rating
Unit
Power supply voltage VCC 3 24 30 V
Oscillation frequency F
- - 300 kHz
OSC
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2009.11 - Rev.A
BD63536FJ
●Electrical characteristics (Unless otherwise specified, Ta25C, VCC 24V)
Item Symbol
Min. Typ. Max.
Limit
General
Circuit current ICC - 2 4 mA V
Current limit block
Switching voltage VCL VCC-0.156 VCC-0.150 VCC-0.144 V VCS: sweep down
Output OFF switching voltage V
VCC-1.3 VCC-1.0 VCC-0.7 V VCS: sweep down
OOFF
CS input bias current ICS - 0.3 1.0 µA VCS=VCC
Output block
GATE H voltage V
GATE L voltage V
VCC-0.10 VCC-0.05 - V I
ONH
VCC-6.20 VCC-5.40 VCC-4.60 V I
ONL
Reference voltage block
VREF output voltage V
2.375 2.500 2.625 V I
REF
Low input malfunction prevention circuit block
Threshold voltage V
Hysteresis voltage ⊿V
2.3 2.5 2.7 V VCC: sweep up
UVLO
UVLO
0.05 0.15 0.25 V
Triangular waveform oscillator block
Oscillation H voltage V
Oscillation L voltage V
1.26 1.40 1.54 V V
OSH
0.9 1.0 1.1 V V
OSL
Error amplifier block
Input bias current I
Reference voltage V
Feedback H voltage V
Feedback L voltage V
-0.3 -0.1 - µA IN-=0V
IN-
1.237 1.250 1.263 V FB=V
IN-
1.6 1.9 - V IFB=-100µA
FBH
- 0.6 0.9 V IFB=100µA
FBL
●Reference Characteristics (Unless otherwise specified, Ta25C, V
Item Symbol
Reference value
Min. Typ. Max.
CC
3V)
Output block
GATE H voltage V
GATE L voltage V
○“” sign for current value represents the direction in which the current flows out from the IC.
VCC-0.02 VCC-0.01 - V I
ONH
- 0.075 0.150 V I
ONL
Technical Note
Unit Condition
=0V
OSC
=-10mA
GATE
=10mA
GATE
=-0.1mA
VREF
: sweep up
OSC
: sweep down
OSC
IN-
Unit Condition
=-1mA
GATE
=1mA
GATE
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2009.11 - Rev.A
BD63536FJ
●Reference characteristics data (Unless otherwise specified, Ta25C, VCC 24V)
5.0
4.0
0.5
0.4
3.0
0.3
Icc [mA]
2.0
1.0
0.0
0 4 8 12 16 20 24 28 32
VCC : [V]
Fig.1 Circuit current
0.2
0.1
CS bias Current [uA]
0
0 4 8 121620242832
Vcc : [V]
Fig.2 CS current
25
24
23
22
21
20
19
18
Output VONH [V]
17
16
15
0 5 10 15 20 25 30
Output Current : I
GATE
[mA]
Fig.3 H voltage (Output block)
25
24
23
22
21
20
19
18
Output VONL [V]
17
16
15
0 5 10 15 20 25 30
Input Current : I
Fig.4 L voltage (Output block)
35
30
25
20
15
10
Output VONH [V]
5
0
3 6 9 12151821242730
VCC : [V]
Fig.5 H voltage (Output block)
35
30
25
20
15
10
Output VONL[V]
5
0
3 6 9 12 15 18 21 24 27 30
VCC : [V]
Fig.6 L voltage (Output block)
GATE
Technical Note
[mA]
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2009.11 - Rev.A
BD63536FJ
●Reference characteristics data (Unless otherwise specified, Ta25C, VCC 24V)
1.5
1.5
Technical Note
1.2
0.9
(IN-=FB)[V]
IN-
0.6
V
0.3
基準電圧
0
Reference Voltage
0 4 8 121620 242832
VCC : [V]
Fig.7 Reference Voltage (Error amplifier block)
2.5
2.0
1.5
1.0
Output : FB_H [V]
0.5
0.0
0 100 200 300 400 500
Output Current : I
[uA]
FB
Fig.9 FB_H voltage
1.2
0.9
(IN-=FB)[V]
IN-
0.6
V
0.3
基準電圧
0
Reference Voltage
-25 0 25 50 75
Temper atur e : Ta [℃]
85
Fig.8 Reference Voltage (Error amplifier block)
2.5
2.0
1.5
1.0
Output : HB_L [V]
0.5
0.0
0 100 200 300 400 500
Input Current : I
[uA]
FB
Fig.10 FB_L voltage
3.0
2.0
[V]
REF
V
1.0
0.0
0 4 8 12162024 2832
VCC : [V]
Fig.11 Reference Voltage (Reference voltage block)
3.0
2.0
[V]
REF
V
1.0
0.0
0 0.25 0.5 0.75 1
Output Current : I
[mA]
REF
Fig.12 Reference Voltage (Reference voltage block)
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2009.11 - Rev.A
BD63536FJ
●Pin functions / Block diagram / Application circuit diagram / I/O equivalent circuit diagram
PIN NO. Pin Name Function
1 OSC PWM frequency setting
2 VREF 2.5V regulator output
3 FB Error amplifier output
4 IN- Error amplifier input
5 GATE Gate output
6 CS Current limit input
7 Vcc Power supply
8 GND Ground
IN-
Vcc
50kΩ
50kΩ
VREF
1kΩ
Fig.13 I/O equivalent circuit diagram
Vcc
CS
VREF
VREF
200Ω
Vcc
OSC
Vcc
10Ω
200Ω
5kΩ
FB
Technical Note
VREF
200Ω
200Ω
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5/16
2009.11 - Rev.A
q
BD63536FJ
Reference voltage output.
Connect a capacitor of 0.1
this pin.
A resistor and capacitor used to
make oscillation frequency
setting. It is recommended to
set the resistor to 20k to 100k
and the capacitor to 100pF to
10nF.
An external resistor and capacitor of
filter used to determine frequency
characteristics
F to
VREF
OSC
Soft Start
GATEOFF
VREG
OSC
UVLO
TSD
OVP
FB IN-
COMP
Controller
C.L.
COMP
GATE
OFF
GND
Fig.14 Typical block diagram / application circuit
VCC
CS
GATE
A smoothing LC filter
Technical Note
A decoupling capacitor.
It is recommended to set this capacitor
F to 100F for electrolytic
to 10
capacitors or 0.01
laminated ceramic capacitors.
F to 0.1F for
V
IN
A resistor used to
detect current. It is
recommended to set
this resistor to 0 to
.
0.3
An external
resistor and
capacitor of
filter used to
determine
fre
uency
A resistor used to
monitor voltage
detection
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2009.11 - Rev.A
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