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Datasheet
1.8V to 5.5V, 300mA 1ch
Synchronous Boost DC/DC Converter
BU33DV7NUX
●General Description
The BU33DV7NUX devices provide a power supply
solution for products powered by either two-cell alkaline,
NiCd or NiMH, or one-cell Li-ion or Li-polymer battery.
Output currents can go as high as 300mA while using
two alkaline, and discharge it down to 1.8 V.
With the MODE pin, the BU33DV7NUX provides mode
selection of PWM control or PFM/PWM automatic
switching control. When load current is large, the
product switches automatically to the PWM mode so that
high efficiency is achievable over a wide range of load
conditions. The maximum peak current in the boost
switch is typically limited to a value of 1.85A.
BU33DV7NUX output voltage is fixed by an internal
resistor divider. When VIN voltage is higher than 3.3 V,
Vout is connected with Vin.
●Features
・Synchronous Boost DC/DC Converter(PFM/PWM)
300mA @Vout=3.3V, Vin=1.8V
・Fixed Output voltage (3.3V)
・Pass-Through Function1 (VIN > VOUT<3.3V>)
・Thermal Shutdown
・VSON010X3030 (Small Package)
●Key Specifications
■ Input voltage range:
1.8V to 5.5V
■ Output Voltage range:
3.23V to 3.37V
■ Output current:
300mA (Max.)
■ Switching frequency:
0.6MHz (Typ.)
■ Pch FET ON resistance:
160mΩ (Typ.)
■ Nch FET ON resistance:
90mΩ (Typ.)
■ Standby current (MODE=0V):
4.5µA (Max.)
■ Standby current (MODE=VIN):
1.5µA (Max.)
■ Operating temperature range:
-40℃to+85℃
●Typical Application Circuit
＜Available Features with MODE=0V＞
・Pass-Through Function2 during EN-OFF
・Disconnect Function during UVLO
・UVLO-detect Voltage:1.8V(typ)
・UVLO-release Voltage:2.0V(typ)
・PWM(Switching Frequency 600kHz)
＜Available Features with MODE=VIN＞
・Disconnect Function during EN-OFF and UVLO
・UVLO-detect Voltage:1.8V(typ)
・UVLO-release Voltage:2.0V(typ)
・PFM/PWM(Switching Frequency to 600kHz)
●Applications
・Two-Cell Alkaline, NiCd or NiMH or
Single-Cell Li Battery-Powered Products
・Portable Audio Players
・PDA
・Cellular Phones
・Personal Medical Products
●Package
10-pin small “VSON010X3030” package.
<3.1mm (Typ.) x 3.1mm (Typ.) x 0.6mm (Max.)>
VSON010X3030
●Typical Performance characteristics
Necessary at PFM
Efficiency Temp=25℃
R1
100.0
VIN
C4
SW
L1
C3
90.0
C2
80.0
COMP
MODE
PFM2.4V
70.0
PGND
PFM1.8V
Efficiency [%]
C1
VOUT
OUT
AGND
RSTBC
60.0
PWM1.8V
50.0
40.0
PWM2.4V
30.0
20.0
RSTBO
EN
10.0
0.0
0.1
1
10
100
1000
Iout [mA]
Figure 1.
Application Circuit
○Product structure：Silicon monolithic integrated circuit
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TSZ22111・14・001
Figure 2.
Efficiency
○This product is not designed protection against radioactive rays.
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Datasheet
BU33DV7NUX
●Absolute maximum ratings(Ta=25℃)
Parameter
Maximum applied voltage
Symbol
Vmax
Ratings
7.0
Unit
V
Power dissipation1
Pd1
464 (Note1)
mW
Power dissipation2
Pd2
1440 (Note2)
mW
Operating temperature range
Storage temperature range
Topr
Tstr
-40 to +85
-55 to +125
o
o
Condition
1layer(74.2x74.2mm)board
2
2
(Surface heat radiation copper
foil：6.28mm )
4layer(74.2x74.2mm)board
2
(1,4layer heat radiation copper foil：6.28mm )
2
(2,3layer heat radiation copper foil：5500mm )
C
C
*1 When it is used by more than Ta=25℃, it is reduced by 4.64mW/℃.
*2 When it is used by more than Ta=25℃, it is reduced by 14.4mW/℃.
●Operating conditions
Parameter
Power supply voltage range
Symbol
VCC
Ratings
1.8 to 5.5
Unit
V
Condition
VIN terminal voltage
●Electrical characteristics [BU34DV7NUX]
(Unless otherwise specified Ta=25℃、VIN=2.4V)
Parameter
Symbol
Min.
Typ.
Max.
Unit
Condition
Circuit current1(EN=0V)
Circuit current2(EN=0V)
ICC1A
ICC2A
-
1.6
0.3
4.5
1.5
µA
µA
EN=0V,MODE=0V
EN=0V,MODE=VIN
Circuit current1 no switching
(EN=VIN,VOUT=5V)
ICC1B
-
140
250
µA
EN=VIN,MODE=0V,
VOUT=5.0V (not include SW)
ICC2B
-
25
50
µA
0.5
3.23
1.4
0.9
0.9
VIN-0.2
450
1.9
1.75
3.2
20
3.5
30
0.6
3.3
1.85
0.1
VIN-0.1
600
90
160
1.0
60
2.0
1.8
0.2
3.3
50
0.7
3.37
2.2
0.2
0.2
0.2
750
2.1
1.85
3.4
80
Circuit current2 no switching
(EN=VIN,VOUT=5V)
Circuit current1(EN=VIN)
Circuit current2(EN=VIN)
Oscillation frequency
Output voltage range
Current limit
EN Input High
EN Input Low
MODE Input High
MODE Input Low
RSTBO output low voltage
RSTBO output high voltage
RSTBC output resistance
SWN1 switch on resistance
SWP1 switch on resistance
SWN2 switch on resistance
SWP2 switch on resistance
UVLO Release Threshold
UVLO Detect Threshold
UVLO Hysteresis
VIN Thru
VIN Thru Hysteresis
ICC1C
ICC2C
Fsw
Vout
Ilim
VIH_EN
VIL_EN
VIH_MODE
VIL_MODE
Vrstol
Vrstoh
Rrstbc
Rswn1
Rswp1
Rswn2
Rswp2
VuvloR
VuvloD
Vuvlohys
Vinthru
Vinthruhys
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TSZ22111・15・001
2/24
mA
µA
MHz
V
A
V
V
V
V
V
V
kΩ
mΩ
mΩ
kΩ
Ω
V
V
V
V
mV
EN=VIN,MODE=VIN,
VOUT=5.0V (not include SW)
EN=VIN,MODE=0V, Io=0mA
EN=VIN,MODE=VIN, Io=0mA
Io=1mA
DC - Current
Ioi=100uA,MODE=0V
Ioi=-100uA,MODE=0V
VOUT=3.3V
MODE=VIN,EN=0V
MODE=0V,EN=0V
VIN rising
VIN falling
TSZ02201-0Q1Q0AH00110-1-2
02.Aug.2012 Rev.001
Datasheet
BU33DV7NUX
●Block diagram
RSTBC
VIN
RSTBO
DELAY
UVLO
VOUT
SWN2
SOFT
START
SWP1
VIN
SWP2
MODE
CONTROL
LOGIC
LEVEL
SHIFT
SW
DRIVER
VIN
SW
SWN1
TSD
EN
OSC
+
+
-
SWN3
COMP
AGND
PGND
Figure 3. Circuit Block
●MODE
INPUT PIN
EN
PIN
UVLO
UVLO
RELEASE
VOLTAGE
0V
0V
ON
2.0V(typ)
FUNCTION
DC/DC-control
PWM
or
PFM/PWM
-
0V
VIN
ON
2.0V(typ)
PWM
VIN
0V
OFF
-
-
VIN
VIN
ON
2.0V(typ)
PFM/PWM
MODE
PIN
SW-ON/OFF
RSTBO
0V
While Soft Start : 0V
After Soft Start : VIN
0V
While Soft Start : 0V
After Soft Start : VIN
SWP2
SWN2
SWN3
SWP1
SWN1
ON
OFF
OFF
OFF
OFF
OFF
OFF
ON
Switching
Switching
OFF
ON
OFF
OFF
OFF
OFF
OFF
ON
Switching
Switching
●Pin Configuration
A
3.0±0.1
3.0±0.1
1PIN MARK
0.08 S
2.0±0.1
0.5
C0.25
C
A
B
B
C
1
10
0.5
S
(0.12)
Power supply input
Inductor connection terminal
Phase Compensation Pin
Function Select Pin
Soft Start Output Pin
RSTBO
5
While Soft Start : LOW(GND)
After Soft Start : High(VIN)
EN=VIN: Power-ON
EN
6
EN=GND: Power-OFF
RSTBC
7
Low Battery Detect Delay Pin
AGND
8
GND
PGND
9
GND
VOUT
10
Boost voltage output Pin
※ Don’t use EN PIN and MODE PIN at open.
VSON010X3030
+0.03
0.02 -0.02
1
2
3
4
Terminal
circuit
C
C
A
C
5
1.2±0.1
Function
0.6MAX
VIN
SW
COMP
MODE
Pin No.
0.4±0.1
Symbol
6
+0.05
0.25 -0.04
(Unit : mm)
Figure 4. Package
●Input-Output Equivalent Circuit
I/O equivalent circuit diagram is as follows.
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Datasheet
BU33DV7NUX
●Electrical characteristic curves (Reference data)
・Quiescent Current
EN=OFF ICC PWM
OUTPUT VOLTAGE EN=OFF PWM
8
7.0
7
6.0
6
5.0
5
4.0
VOUT[V]
ICC [μA]
Ta=85℃
4
3
Ta=25℃
Ta=85℃
3.0
Ta=25℃
2.0
2
1.0
1
Ta=-40℃
Ta=-40℃
0
0.0
0
1
2
3
4
5
6
7
VIN [V]
1
2
3
4
5
6
VIN [V]
Figure 5. Quiescent Current PWM
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0
Figure 6. Out Put Voltage (EN=OFF) PWM
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7
Datasheet
BU33DV7NUX
●Electrical characteristic curves (Reference data) - Continued
・Quiescent Current - Continued
EN=OFF ICC PFM
OUTPUT VOLTAGE EN=OFF PFM
8
0.25
7
0.20
6
Ta=85℃
0.15
VOUT[V]
ICC [μA]
5
4
Ta=85℃
3
0.10
Ta=25℃
2
0.05
Ta=-40℃
Ta=25℃
1
0
Ta=-40℃
0.00
0
1
2
3
4
5
6
7
VIN [V]
0
1
2
3
4
5
6
7
VIN [V]
Figure 7. Quiescent Current PFM
Figure 8. Out Put Voltage (EN=OFF) PFM
・Frequency
Frequency
800
750
Freq [kHz]
700
Ta=85℃
650
Ta=25℃
600
Ta=-40℃
550
500
1.5
2
2.5
3
3.5
VIN [V]
Figure 9. Frequency
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02.Aug.2012 Rev.001
Datasheet
BU33DV7NUX
●Electrical characteristic curves (Reference data) - Continued
・Efficiency
Efficiency VIN=2.4V
Efficiency VIN=1.8V
100.0
100.0
Ta=-40℃
90.0
90.0
80.0
80.0
Ta=25℃
Ta=-40℃
Ta=25℃
70.0
Ta=85℃
60.0
Efficiency [%]
Efficiency [%]
60.0
70.0
50.0
40.0
30.0
Ta=85℃
50.0
40.0
30.0
20.0
20.0
10.0
10.0
0.0
0.0
0.1
1
10
100
1000
0.1
1
10
100
1000
Iout [mA]
Iout [mA]
Figure 11. Efficiency PWM VIN=2.4V
Figure 10. Efficiency PWM VIN=1.8V
Efficiency VIN=3.2V
100.0
90.0
80.0
Ta=-40℃
70.0
Ta=85℃
Efficiency [%]
60.0
50.0
40.0
30.0
Ta=25℃
20.0
10.0
0.0
0.1
1
10
100
1000
Iout [mA]
Figure 12. Efficiency PWM VIN=3.2V
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02.Aug.2012 Rev.001
Datasheet
BU33DV7NUX
●Electrical characteristic curves (Reference data) - Continued
・Efficiency - Continued
Efficiency VIN=1.8V
Efficiency VIN=2.4V
100.0
100.0
Ta=-40℃
Ta=-40℃
90.0
90.0
80.0
80.0
Ta=85℃
70.0
70.0
Ta=25℃
Ta=85℃
Ta=25℃
60.0
Efficiency [%]
Efficiency [%]
60.0
50.0
40.0
30.0
50.0
40.0
30.0
20.0
20.0
10.0
10.0
0.0
0.0
0.1
1
10
100
1000
Iout [mA]
0.1
1
10
100
1000
Iout [mA]
Figure 13. Efficiency PFM VIN=1.8V
Figure 14. Efficiency PFM VIN=2.4V
Efficiency VIN=3.2V
100.0
Ta=-40℃
90.0
80.0
70.0
Ta=25℃
Efficiency [%]
60.0
50.0
Ta=85℃
40.0
30.0
20.0
10.0
0.0
0.1
1
10
100
1000
Iout [mA]
Figure 15. Efficiency PFM VIN=3.2V
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TSZ22111・15・001
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02.Aug.2012 Rev.001
Datasheet
BU33DV7NUX
●Electrical characteristic curves (Reference data) - Continued
・Load Regulation
Load Regulation VIN=1.8V
Load Regulation VIN=2.4V
3.40
3.40
3.35
3.35
Ta=85℃
VOUT [V]
VOUT [V]
Ta=85℃
3.30
Ta=25℃
Ta=-40℃
3.25
3.30
Ta=25℃
Ta=-40℃
3.25
3.20
3.20
0
50
100
150
200
250
300
Iout [mA]
0
50
100
150
200
250
300
Iout [mA]
Figure 16. Load Regulation PWM VIN=1.8V
Figure 17. Load Regulation PWM VIN=2.4V
Load Regulation VIN=3.2V
3.40
3.35
VOUT [V]
Ta=85℃
3.30
Ta=25℃
Ta=-40℃
3.25
3.20
0
50
100
150
200
250
300
Iout [mA]
Figure 18. Load Regulation PWM VIN=3.2V
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TSZ22111・15・001
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TSZ02201-0Q1Q0AH00110-1-2
02.Aug.2012 Rev.001
Datasheet
BU33DV7NUX
●Electrical characteristic curves (Reference data) – Continued
・Load Regulation - Continued
Load Regulation VIN=1.8V
Load Regulation VIN=2.4V
3.50
3.50
3.45
3.45
Ta=85℃
3.40
VOUT [V]
VOUT [V]
Ta=85℃
Ta=-40℃
Ta=25℃
3.35
3.40
Ta=-40℃
3.35
3.30
Ta=25℃
3.30
0
50
100
150
200
250
300
0
Iout [mA]
50
100
150
200
250
300
Iout [mA]
Figure 19. Load Regulation PFM VIN=1.8V
Figure 20. Load Regulation PFM VIN=2.4V
Load Regulation VIN=3.2V
3.50
3.45
VOUT [V]
Ta=85℃
3.40
Ta=25℃
3.35
Ta=-40℃
3.30
0
50
100
150
200
250
300
Iout [mA]
Figure 21. Load Regulation PFM VIN=3.2V
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02.Aug.2012 Rev.001
Datasheet
BU33DV7NUX
●Electrical characteristic curves (Reference data) - Continued
・Rise
ch2:EN 2.0V/di v
ch2:EN 2.0V/d i v
ch1:VOUT 500mV/di v
ch1:VOUT 500mV/d i v
ch4:Icoi l 200mA/d i v
ch4:Icoi l 200mA/di v
ch3:RSTBO 1.0V/d i v
ch3:RSTBO 1.0V/d i v
Figure 22. RISE [EN : OFF=>ON] PWM
VIN=2.4V Io=0mA
Figure 23. RISE [EN : OFF=>ON] PFM
VIN=2.4V Io=0mA
ch2:EN 2.0V/d i v
ch2:EN 2.0V/di v
ch1:VOUT 500mV/d i v
ch1:VOUT 500mV/d i v
ch4:Icoi l 200mA/d i v
ch4:Icoi l 200mA/di v
ch3:RSTBO 1.0V/d i v
ch3:RSTBO 1.0V/d i v
Figure 24. RISE [EN : OFF=>ON] PWM
VIN=3.2V Io=0mA
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TSZ22111・15・001
Figure 25. RISE [EN : OFF=>ON] PFM
VIN=3.2V Io=0mA
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Datasheet
BU33DV7NUX
●Electrical characteristic curves (Reference data) - Continued
・Rise - Continued
ch2:EN 2.0V/div
ch2:EN 5.0V/div
ch1:VOUT 1.0V/div
ch1:VOUT 1.0V/div
ch4:Icoil 200mA/div
ch4:Icoil 20mA/div
ch3:RSTBO 2.0V/div
ch3:RSTBO 2.0V/div
Figure 27. RISE [EN : OFF=>ON] PFM
VIN=5.5V Io=0mA
Figure 26. RISE [EN : OFF=>ON] PWM
VIN=5.5V Io=0mA
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02.Aug.2012 Rev.001
Datasheet
BU33DV7NUX
●Electrical characteristic curves (Reference data) - Continued
・Fall
ch2:EN 2.0V/d i v
ch2:EN 2.0V/d i v
ch1:VOUT 500mV/d i v
ch1:VOUT 500mV/d i v
ch4:Icoi l 200mA/d i v
ch4:Icoi l 200mA/d i v
ch3:RSTBO 1.0V/di v
ch3:RSTBO 1.0V/d i v
Figure 28. FALL [EN : ON=>OFF] PWM
VIN=2.4V Io=0mA
Figure 29. FALL [EN : ON=>OFF] PFM
VIN=2.4V Io=0mA
ch2:EN 2.0V/d i v
ch2:EN 2.0V/d i v
ch1:VOUT 500mV/di v
ch1:VOUT 500mV/di v
ch4:Icoi l 200mA/d i v
ch4:Icoi l 200mA/d i v
ch3:RSTBO 1.0V/d i v
ch3:RSTBO 1.0V/di v
Figure 31. FALL [EN : ON=>OFF] PFM
VIN=3.2V Io=0mA
Figure 30. FALL [EN : ON=>OFF] PWM
VIN=3.2V Io=0mA
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02.Aug.2012 Rev.001
Datasheet
BU33DV7NUX
●Electrical characteristic curves (Reference data) – Continued
・Fall - Continued
ch2:EN 5.0V/d i v
ch2:EN 5.0V/d i v
ch1:VOUT 1.0V/d i v
ch1:VOUT 1.0V/d i v
ch4:Icoi l 200mA/d i v
ch4:Icoi l 200mA/d i v
ch3:RSTBO 2.0V/d i v
ch3:RSTBO 2.0V/d i v
Figure 33. FALL [EN : ON=>OFF] PFM
VIN=5.5V Io=0mA
Figure 32. FALL [EN : ON=>OFF] PWM
VIN=5.5V Io=0mA
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02.Aug.2012 Rev.001
Datasheet
BU33DV7NUX
●Electrical characteristic curves (Reference data) - Continued
・Io change PWM
ch1:VOUT 100mV/d i v
ch1:VOUT 100mV/di v
ch4:Icoi l 100mV/d i v
ch4:Icoi l 100mV/d i v
Figure 34. Io change PWM 1mA=>100mA
VIN=1.8V
Figure 35. Io change PWM 100mA=>1mA
VIN=1.8V
ch1:VOUT 100mV/d i v
ch1:VOUT 100mV/d i v
ch4:Icoi l 100mV/d i v
ch4:Icoi l 100mV/d i v
Figure 36. Io change PWM 1mA=>100mA
VIN2.4V
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TSZ22111・15・001
Figure 37. Io change PWM 100mA=>1mA
VIN=2.4V
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Datasheet
BU33DV7NUX
●Electrical characteristic curves (Reference data) – Continued
・Io change PWM - Continued
ch1:VOUT 100mV/d i v
ch1:VOUT 100mV/d i v
ch4:Icoi l 100mV/d i v
ch4:Icoi l 100mV/d i v
Figure 38. Io change PWM 1mA=>100mA
VIN=3.2V
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TSZ22111・15・001
Figure 39. Io change PWM 100mA=>1mA
VIN=3.2V
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Datasheet
BU33DV7NUX
●Electrical characteristic curves (Reference data) - Continued
・Io change PFM
ch1:VOUT 200mV/di v
ch1:VOUT 200mV/d i v
ch4:Icoi l 100mV/d i v
ch4:Icoi l 100mV/di v
Figure 41. Io change PFM 100mA=>1mA
VIN=1.8V
Figure 40. Io change PFM 1mA=>100mA
VIN=1.8V
ch1:VOUT 100mV/d i v
ch1:VOUT 100mV/d i v
ch4:Icoi l 100mV/d i v
ch4:Icoi l 100mV/d i v
Figure 43. Io change PFM 100mA=>1mA
VIN=2.4V
Figure 42. Io change PFM 1mA=>100mA
VIN2.4V
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Datasheet
BU33DV7NUX
●Electrical characteristic curves (Reference data) – Continued
・Io change PFM - Continued
ch1:VOUT 100mV/d i v
ch1:VOUT 100mV/d i v
ch4:Icoi l 100mV/d i v
ch4:Icoi l 100mV/d i v
Figure 44. Io change PFM 1mA=>100mA
VIN=3.2V
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TSZ22111・15・001
Figure 45. Io change PFM 100mA=>1mA
VIN=3.2V
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Datasheet
BU33DV7NUX
●Notes
- Load Current 300mA (max)
Timing of possible Load 300mA (max) is dueling RSTBO “H”.
ch2:EN 2.0V/d i v
ch1:VOUT 500mV/d i v
300mA (max)
ch4:Icoi l 200mA/d i v
ch3:RSTBO 1.0V/d i v
Figure 46. Load Current 300mA timing
-EN: ON<=>OFF PFM (MODE=VIN)
VIN connect to VOUT at Rswp2 MODE=VIN. Please note Drop of VOUT.
EN
dv/dt = -Iout/Cout
VOUT
Vout = 3.3×（1-EXP(-t/τ))
VOUT Drop
VOUT = VIN - (Iout x Rswp2)
Thru Mode
Soft Start
t = time
EN:500mV/Div
VOUT:500mV/Div
Vout Drop
Thru Mode
Soft Start
Figure 47. EN : L=>H PFM Io=5mA
VIN=3.6V
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Datasheet
BU33DV7NUX
●How to select parts of application
・PWM
C1
VIN
VOUT
SW
PGND
L1
C3
COMP
AGND
MODE
RSTBC
RSTBO
Parts No.
L1
OUT
C2
EN
Name
Inductance
Value
6.8µH
C1
Capacitor
10µF
STYLE(VENDOR)
VLF504015M-6R8M(TDK),
LQH44PN6R8MP0L(Murata)
X7R,X5R Ceramic
C2
C3
Capacitor
Capacitor
22µF
470pF
X7R,X5R Ceramic
X7R,X5R Ceramic
・PFM
R1
C1
VIN
VOUT
SW
PGND
C4
L1
C3
COMP
AGND
MODE
RSTBC
EN
RSTBO
Parts No.
L1
C1
C2
C3
C4
R1
Name
Inductance
Value
6.8uH
Capacitor
Capacitor
Capacitor
Capacitor
Resister
10µF
22µF
470pF
4.7µF
10Ω
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TSZ22111・15・001
OUT
C2
STYLE(VENDOR)
VLF504015M-6R8M(TDK),
LQH44PN6R8MP0L(Murata)
X7R,X5R Ceramic
X7R,X5R Ceramic
X7R,X5R Ceramic
-
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Datasheet
BU33DV7NUX
●Notes of board layout
BU33DV7NUX is switching DCDC converter, so characteristics of noise and etc changing by board layout. Please note the
following respect besides a general board layout matter when you make PCB.
●About heat loss
In the heat design, please operate it in the following condition.
(Please consider the margin etc. because the following temperature is a guarantee temperature.)
1. Surrounding temperature Ta must be 85℃ or less.
2. Loss of IC must be permissible loss Pd or less.
The allowable dissipation (Pd) characteristics are described below.
2.1
2.0
1.8
1.6
1.4
1.2
1.0
0.8
0.4
0.2
0
0
25
50
75
100
125
TEMPARATURE(℃)
4layer(74.2×74.2mm）board
(1,4layer heat radiation copper foil：6.28mm 2 ）
(2,3layer heat radiation copper foil：5500mm 2 )
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TSZ22111・15・001
1layer(74.2×74.2mm）board
(Surface heat radiation copper foil：6.28mm 2 ）
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Datasheet
BU33DV7NUX
●Caution on use
（1）Absolute Maximum Ratings
An excess in the absolute maximum rating, such as supply voltage, temperature range of operating conditions, etc., can
break down devices, thus making impossible to identify breaking mode such as a short circuit or an open circuit. If any
special mode exceeding the absolute maximum ratings is assumed, consideration should be given to take physical safety
measures including the use of fuses, etc.
（2）The power supply and the GND lines
Design PCB pattern to provide low impedance for the wiring between the power supply and the GND lines. Please take
care about interference by common impedance of the wiring pattern when there are two or more power supply and
GND line. For the GND line, please note the separation of the large current route and the small signal route including
the external circuit.Furthermore, for all power supply terminals to ICs; mount a capacitor between the power supply and the
GND terminal. At the same time, in order to use an electrolytic capacitor, thoroughly check to be sure the characteristics of
the capacitor to be used present no problem including the occurrence of capacity dropout at a low temperature, thus
determining the constant.
（3）GND voltage
Make setting of the potential of the GND terminal so that it will be maintained at the minimum in any operating state.
（4）Short circuit between terminals and erroneous mounting
In order to mount ICs on a set PCB, pay thorough attention to the direction and offset of the ICs. Erroneous mounting can break
down the ICs. Furthermore, if a short circuit occurs due to foreign matters entering between terminals or between the terminal
and the power supply or the GND terminal, the ICs can break down.
（5）Operation in strong electromagnetic field
Be noted that using ICs in the strong electromagnetic field can malfunction them.
（6）Input terminals
In terms of the construction of IC, parasitic elements are inevitably formed in relation to potential. The operation of the parasitic
element can cause interference with circuit operation, thus resulting in a malfunction and then breakdown of the input terminal.
Therefore, pay thorough attention not to handle the input terminals, such as to apply to the input terminals a voltage lower than
the GND respectively, so that any parasitic element will operate. Furthermore, do not apply a voltage to the input terminals when
no power supply voltage is applied to the IC. In addition, even if the power supply voltage is applied, apply to the input terminals
a voltage lower than the power supply voltage or within the guaranteed value of electrical characteristics.
（7）External capacitor
In order to use a ceramic capacitor as the external capacitor, determine the constant with consideration given to a
degradation in the nominal capacitance due to DC bias and changes in the capacitance due to temperature, etc.
（8）Thermal design
Perform thermal design in which there are adequate margins by taking into account the permissible dissipation (Pd) in
actual states of use. Moreover, please use it within the range where output Tr doesn't exceed the rated voltage and ASO.
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Datasheet
BU33DV7NUX
●Caution on use- Continued
（9）Rush current
In CMOS IC, when the power supply is turned on rush current might flow momentarily in logical internal irregular state.
Therefore, note drawing the capacity of the power supply coupling, the power supply, and width and drawing the GND
pattern wiring, please.
（10）Test terminal and unused terminal processing
Please process a test terminal and unused terminal according to explanations of the function manual and the application
note, etc. to be unquestionable while real used. Moreover, please inquire of the person in charge of our company about
the terminal without the explanation especially.
(11)Content of material
The application notes etc. are the design material to design the application, and no one of the content securing it. Please
decide the application after it examines enough and it evaluates it including external parts.
Status of this document
The Japanese version of this document is formal specification. A customer may use this translation version only for a
reference to help reading the formal version.
If there are any differences in translation version of this document formal version takes priority
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Datasheet
BU33DV7NUX
●Ordering part number
B
U
3
Part No.
3
D
V
7
N
U
Output
Voltage
X
-
E
2
Wrapping、
Forming specification
E2:Reelemboss taping
Package NUX:
VSON010X3030
VSON010X3030
<Tape and Reel information>
3.0±0.1
3.0±0.1
2.0±0.1
0.5
E2
The direction is the 1pin of product is at the upper left when you hold
( reel on the left hand and you pull out the tape on the right hand
)
5
0.4±0.1
1.2±0.1
1
4000pcs
(0.12)
0.08 S
C0.25
Embossed carrier tape
Quantity
Direction
of feed
S
+0.03
0.02 -0.02
0.6MAX
1PIN MARK
Tape
10
0.5
6
+0.05
0.25 -0.04
1pin
(Unit : mm)
Reel
Direction of feed
∗ Order quantity needs to be multiple of the minimum quantity.
●Lineup
Output Voltage(Typ.)
Package
Orderable Part Number
3.4V
VSON010X3030
BU34DV7NUX-E2
3.3V
VSON010X3030
BU33DV7NUX-E2
●Marking Diagram(s) (TOP VIEW)
VSON010V3030
(TOP VIEW)
VSON010V3030 (TOP VIEW)
Part Number Marking
U33
LOT Number
DV7
Product Name
BU34DV7NUX
BU33DV7NUX
Part Number Marking
U34
DV7
U33
DV7
1PIN MARK
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02.Aug.2012 Rev.001
Datasheet
BU33DV7NUX
●Revision History
Date
Revision
02.Aug.2012
001
Changes
New Release
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Datasheet
Notice
Precaution on using ROHM Products
1.
Our Products are designed and manufactured for application in ordinary electronic equipments (such as AV equipment,
OA equipment, telecommunication equipment, home electronic appliances, amusement equipment, etc.). If you
(Note 1)
, transport
intend to use our Products in devices requiring extremely high reliability (such as medical equipment
equipment, traffic equipment, aircraft/spacecraft, nuclear power controllers, fuel controllers, car equipment including car
accessories, safety devices, etc.) and whose malfunction or failure may cause loss of human life, bodily injury or
serious damage to property (“Specific Applications”), please consult with the ROHM sales representative in advance.
Unless otherwise agreed in writing by ROHM in advance, ROHM shall not be in any way responsible or liable for any
damages, expenses or losses incurred by you or third parties arising from the use of any ROHM’s Products for Specific
Applications.
(Note1) Medical Equipment Classification of the Specific Applications
JAPAN
USA
EU
CHINA
CLASSⅢ
CLASSⅡb
CLASSⅢ
CLASSⅢ
CLASSⅣ
CLASSⅢ
2.
ROHM designs and manufactures its Products subject to strict quality control system. However, semiconductor
products can fail or malfunction at a certain rate. Please be sure to implement, at your own responsibilities, adequate
safety measures including but not limited to fail-safe design against the physical injury, damage to any property, which
a failure or malfunction of our Products may cause. The following are examples of safety measures:
[a] Installation of protection circuits or other protective devices to improve system safety
[b] Installation of redundant circuits to reduce the impact of single or multiple circuit failure
3.
Our Products are designed and manufactured for use under standard conditions and not under any special or
extraordinary environments or conditions, as exemplified below. Accordingly, ROHM shall not be in any way
responsible or liable for any damages, expenses or losses arising from the use of any ROHM’s Products under any
special or extraordinary environments or conditions. If you intend to use our Products under any special or
extraordinary environments or conditions (as exemplified below), your independent verification and confirmation of
product performance, reliability, etc, prior to use, must be necessary:
[a] Use of our Products in any types of liquid, including water, oils, chemicals, and organic solvents
[b] Use of our Products outdoors or in places where the Products are exposed to direct sunlight or dust
[c] Use of our Products in places where the Products are exposed to sea wind or corrosive gases, including Cl2,
H2S, NH3, SO2, and NO2
[d] Use of our Products in places where the Products are exposed to static electricity or electromagnetic waves
[e] Use of our Products in proximity to heat-producing components, plastic cords, or other flammable items
[f] Sealing or coating our Products with resin or other coating materials
[g] Use of our Products without cleaning residue of flux (even if you use no-clean type fluxes, cleaning residue of
flux is recommended); or Washing our Products by using water or water-soluble cleaning agents for cleaning
residue after soldering
[h] Use of the Products in places subject to dew condensation
4.
The Products are not subject to radiation-proof design.
5.
Please verify and confirm characteristics of the final or mounted products in using the Products.
6.
In particular, if a transient load (a large amount of load applied in a short period of time, such as pulse. is applied,
confirmation of performance characteristics after on-board mounting is strongly recommended. Avoid applying power
exceeding normal rated power; exceeding the power rating under steady-state loading condition may negatively affect
product performance and reliability.
7.
De-rate Power Dissipation (Pd) depending on Ambient temperature (Ta). When used in sealed area, confirm the actual
ambient temperature.
8.
Confirm that operation temperature is within the specified range described in the product specification.
9.
ROHM shall not be in any way responsible or liable for failure induced under deviant condition from what is defined in
this document.
Precaution for Mounting / Circuit board design
1.
When a highly active halogenous (chlorine, bromine, etc.) flux is used, the residue of flux may negatively affect product
performance and reliability.
2.
In principle, the reflow soldering method must be used; if flow soldering method is preferred, please consult with the
ROHM representative in advance.
For details, please refer to ROHM Mounting specification
Notice - GE
© 2014 ROHM Co., Ltd. All rights reserved.
Rev.002
Datasheet
Precautions Regarding Application Examples and External Circuits
1.
If change is made to the constant of an external circuit, please allow a sufficient margin considering variations of the
characteristics of the Products and external components, including transient characteristics, as well as static
characteristics.
2.
You agree that application notes, reference designs, and associated data and information contained in this document
are presented only as guidance for Products use. Therefore, in case you use such information, you are solely
responsible for it and you must exercise your own independent verification and judgment in the use of such information
contained in this document. ROHM shall not be in any way responsible or liable for any damages, expenses or losses
incurred by you or third parties arising from the use of such information.
Precaution for Electrostatic
This Product is electrostatic sensitive product, which may be damaged due to electrostatic discharge. Please take proper
caution in your manufacturing process and storage so that voltage exceeding the Products maximum rating will not be
applied to Products. Please take special care under dry condition (e.g. Grounding of human body / equipment / solder iron,
isolation from charged objects, setting of Ionizer, friction prevention and temperature / humidity control).
Precaution for Storage / Transportation
1.
Product performance and soldered connections may deteriorate if the Products are stored in the places where:
[a] the Products are exposed to sea winds or corrosive gases, including Cl2, H2S, NH3, SO2, and NO2
[b] the temperature or humidity exceeds those recommended by ROHM
[c] the Products are exposed to direct sunshine or condensation
[d] the Products are exposed to high Electrostatic
2.
Even under ROHM recommended storage condition, solderability of products out of recommended storage time period
may be degraded. It is strongly recommended to confirm solderability before using Products of which storage time is
exceeding the recommended storage time period.
3.
Store / transport cartons in the correct direction, which is indicated on a carton with a symbol. Otherwise bent leads
may occur due to excessive stress applied when dropping of a carton.
4.
Use Products within the specified time after opening a humidity barrier bag. Baking is required before using Products of
which storage time is exceeding the recommended storage time period.
Precaution for Product Label
QR code printed on ROHM Products label is for ROHM’s internal use only.
Precaution for Disposition
When disposing Products please dispose them properly using an authorized industry waste company.
Precaution for Foreign Exchange and Foreign Trade act
Since our Products might fall under controlled goods prescribed by the applicable foreign exchange and foreign trade act,
please consult with ROHM representative in case of export.
Precaution Regarding Intellectual Property Rights
1.
All information and data including but not limited to application example contained in this document is for reference
only. ROHM does not warrant that foregoing information or data will not infringe any intellectual property rights or any
other rights of any third party regarding such information or data. ROHM shall not be in any way responsible or liable
for infringement of any intellectual property rights or other damages arising from use of such information or data.:
2.
No license, expressly or implied, is granted hereby under any intellectual property rights or other rights of ROHM or any
third parties with respect to the information contained in this document.
Other Precaution
1.
This document may not be reprinted or reproduced, in whole or in part, without prior written consent of ROHM.
2.
The Products may not be disassembled, converted, modified, reproduced or otherwise changed without prior written
consent of ROHM.
3.
In no event shall you use in any way whatsoever the Products and the related technical information contained in the
Products or this document for any military purposes, including but not limited to, the development of mass-destruction
weapons.
4.
The proper names of companies or products described in this document are trademarks or registered trademarks of
ROHM, its affiliated companies or third parties.
Notice - GE
© 2014 ROHM Co., Ltd. All rights reserved.
Rev.002
Datasheet
General Precaution
1. Before you use our Pro ducts, you are requested to care fully read this document and fully understand its contents.
ROHM shall n ot be in an y way responsible or liabl e for fa ilure, malfunction or acci dent arising from the use of a ny
ROHM’s Products against warning, caution or note contained in this document.
2. All information contained in this docume nt is current as of the issuing date and subj ect to change without any prior
notice. Before purchasing or using ROHM’s Products, please confirm the la test information with a ROHM sale s
representative.
3.
The information contained in this doc ument is provi ded on an “as is” basis and ROHM does not warrant that all
information contained in this document is accurate an d/or error-free. ROHM shall not be in an y way responsible or
liable for an y damages, expenses or losses incurred b y you or third parties resulting from inaccur acy or errors of or
concerning such information.
Notice – WE
© 2014 ROHM Co., Ltd. All rights reserved.
Rev.001