RN5RK SERIES
VFM STEP-UP DC/DC CONVERTER
NO.EA-045-0602
1
OUTLINE
The RN5RKxx1A/xx1B/xx2A Series are CMOS-based VFM (Chopper) Step-up DC/DC converter ICs with ultra
low supply current and high output voltage accuracy.
Each of the RN5RKxx1A/xx1B consists of an oscillator, a VFM control circuit, a driver transistor to have low
ON resistance (Lx switch), a reference voltage unit, a high speed comparator, resistors for voltage detection, an
Lx switch protection circuit and an internal chip enable circuit. A low ripple, high efficiency step-up DC/DC
converter can be composed of this RN5RKxx1A/xx1B with only three external components: an inductor, a diode
and a capacitor.
The RN5RKxx2A uses the same chip as what is employed in the RN5RKxx1A/1B IC and has a drive pin (EXT)
for an external transistor instead of an Lx pin. As it is possible to load a large output current with a power
transistor which has a low saturation voltage, RN5RKxx2A IC is recommendable to users who need an output
current as large as between several tens mA and several hundreds mA.
Using the chip enable function, it is possible to make the supply current on standby minimized.
Since the package for these ICs is SOT-23-5 (Mini-mold), high density mounting of the ICs on board is
possible.
FEATURES
• Small Number of External Components .............................. Only an inductor, a diode and a capacitor
(RN5RKxx1A/xx1B)
• Standby Current ................................................................... Typ. 0µA
• High Output Voltage Accuracy ............................................. ±2.5%
• Low Ripple and Low Noise
• Low Start-up Voltage ............................................................Max.0.9V
• High Efficiency ..................................................................... Typ. 80%
• Including a Driver Transistor with Low ON Resistance........ Only RN5RKxx1A/xx1B
• Two Kinds of Duty Ratio....................................................... 77% (xx1A, xx2A)/ 55% (xx1B)
•
Output Voltage Range.......................................................... 2.0V to 5.5V
• Low Temperature-Drift Coefficient of Output Voltage........... Typ. ±100ppm/°C
• Small Packages ................................................................. SOT-23-5 (Mini-Mold)
APPLICATIONS
• Power source for battery-powered equipment.
• Power source for cameras, camcorders, VCRs, and hand-held communication equipment.
• Power source for those appliances which require higher cell voltage than that of batteries.
RN5R
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OUTLINE DIAGRAM
RN5RKxx1x RN5RKxx2A
Lx 5
1
GND
4
VOUT
2
Vref
Chip Enable
CE
OSC 100kHz
VFM Control
Buffer
VLX limiter
＋
－
Error Amp.
LxSW
EXT 5
1
GND
4
VOUT
2
Vref
Chip Enable
CE
OSC 100kHz
VFM Control
Buffer
＋
－
Error Amp.
SELECTION GUIDE
The output voltage, the driver type, the duty cycle and the taping type for the ICs can be selected at the user's
request.
The selection can be made by designating the part number as shown below:
RN5RKxxxx-xx ←Part Number
↑ ↑↑ ↑
a bc d
Code Contents
a Setting Output Voltage (VOUT) :
Stepwise setting with a step of 0.1V in the range of 2.0V to 5.5V is possible.
b
Designation of Driver
1: Internal Lx Tr. Driver
2: External Tr. Driver
c
Designation of Duty Cycle
A: 77%
B: 55%
d Designation of Taping type
Ex. TR, TL (refer to Taping Specifications, TR type is prescribed as a standard.)
RN5R
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PIN CONFIGURATIONS
• SOT-23-5
12
3
54
(mark side)
PIN DISCRIPTION
•
RN5RKxx1x
•
RN5RKxx2x
Pin No. Symbol Description Pin No. Symbol Description
1 CE Chip Enable Pin 1 CE Chip Enable Pin
2 VOUT Step-up Output Monitoring Pin,
Power Supply (for device itself) 2 VOUT Step-up Output Monitoring Pin,
Power Supply (for device itself)
3 NC No Connection 3 NC No Connection
4 GND Ground Pin 4 GND Ground Pin
5 LX Switching Pin
(Nch Open Drain) 5 EXT
External Tr. Drive Pin
(CMOS Output)
ABSOLUTE MAXIMUM RATINGS
Symbol Item Rating Unit
VOUT Step-up Output Pin Voltage 9.0 V
VLX LX Pin Voltage 9.0 V
VEXT EXT Pin Voltage –0.3 to VOUT+0.3 V
VCE CE Pin Voltage –0.3 to VOUT+0.3 V
ILX Lx Pin Output Current 500 mA
IEXT EXT Pin Output Current ±30 mA
PD Power Dissipation (SOT-23-5)*1 420 mW
Topt Operating Temperature Range –40 to +85 °C
Tstg Storage Temperature Range –55 to +125 °C
*1)For Power Dissipation, please refer to PACKAGE INFORMATION to be described.
ABSOLUTE MAXIMUM RATINGS
Absolute Maximum ratings are threshold limit values that must not be exceeded even for an instant under any
conditions. Moreover, such values for any two items must not be reached simultaneously. Operation above
these absolute maximum ratings may cause degradation or permanent damage to the device. These are stress
ratings only and do not necessarily imply functional operation below these limits.
RN5R
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ELECTRICAL CHARACTERISTICS
• RN5RKxx1A/xx1B
Topt=25°C
Symbol Item Conditions Min. Typ. Max. Unit
VOUT Output Voltage VIN=Set VOUT×0.6, IOUT=1mA ×0.975 ×1.025 V
VIN Input Voltage 8.0 V
∆VOUT/
∆Topt
Output Voltage
Temperature Coefficient −40°C
<
=
Topt
<
=
85°C ±100 ppm
/°C
Vstart Start-Up Voltage VIN=0V→2V*1 0.75 0.90 V
∆Vstart/
∆Topt
Start-Up Voltage
Temperature Coefficient
-40°C
<
=
Topt
<
=
85°C
VIN=0V→2V*1 -1.6 mV/
°C
Vhold Hold-on Voltage (xx1A) VIN=2V→0V*1 0.7 V
Vhold Hold-on Voltage (xx1B) VIN=2V→0V*1 0.9 V
IDD2 Supply Current2 VOUT=VCE=Set VOUT+0.5V 2 5
µA
Istandby Supply Current (Standby) VOUT=6V, VCE=0V 0.5
µA
ILXleak Lx Leakage Current VOUT=VLX=8V 1
µA
fosc Maximum Oscillator
Frequency VOUT=VCE=Set VOUT×0.96 80 100 120 kHz
∆fosc/
∆Topt
Frequency Temperature
Coefficient -40°C
<
=
Topt
<
=
85°C 0.41
kHz/
°C
Oscillator Duty Cycle (xx1A) 70 77 85 %
Duty
Oscillator Duty Cycle (xx1B)
VOUT=VCE=Set VOUT×0.96,
ON (VLX “L” side) 47 55 63 %
Vlxlim VLX Voltage Limit VOUT=VCE=1.95, Lx Switch ON 0.4 0.6 0.8 V
VCEH CE “H” Input Voltage 0.9 V
VCEL CE “L” Input Voltage
VOUT=VCE=Set VOUT×0.96,
Judgment is made by the Lx
waveform 0.3 V
ICEH CE “H” Input Current VOUT=6.0V, VCE=6.0V -0.5 0.0 0.5 µA
ICEL CE “L” Input Current VOUT=6.0V, VCE=0.0V -0.5 0.0 0.5 µA
2.0V
<
=
VOUT
<
=
2.4V 25 50
µA
2.5V
<
=
VOUT
<
=
2.9V 30 55
3.0V
<
=
VOUT
<
=
3.4V 35 60
3.5V
<
=
VOUT
<
=
3.9V 40 65
4.0V
<
=
VOUT
<
=
4.4V 45 75
4.5V
<
=
VOUT
<
=
4.9V 50 80
IDD1 Supply Current1 *2
5.0V
<
=
VOUT
<
=
5.5V 60 90
µA
RN5R
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Symbol Item Conditions Min. Typ. Max. Unit
2.0V
<
=
VOUT
<
=
2.4V, VLX=0.4V 80
2.5V
<
=
VOUT
<
=
2.9V, VLX=0.4V 100
3.0V
<
=
VOUT
<
=
3.4V, VLX=0.4V 120
3.5V
<
=
VOUT
<
=
3.9V, VLX=0.4V 140
4.0V
<
=
VOUT
<
=
4.4V, VLX=0.4V 160
4.5V
<
=
VOUT
<
=
4.9V, VLX=0.4V 180
ILX Lx Switching Current
5.0V
<
=
VOUT
<
=
5.5V, VLX=0.4V 200
mA
*1)Condition: An Output load resistor RL is connected between VOUT and GND.
Note that the resistor RL has a resistance which makes an output current 1mA after step-up operation.
*2)The Supply Current 1 (IDD1) for IC itself is measured when the internal oscillator works continuously.
If the oscillator works intermittently, the supply current becomes smaller than the value which is written on
the above table.
Measurement condition: VOUT=VCE=Setting Output Voltage×0.96
RN5R
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• RN5RKxx2A
Topt=25°C
Symbol Item Conditions Min. Typ. Max. Unit
VOUT Output Voltage VIN=Set VOUT×0.6, IOUT=1mA ×0.975 ×1.025 V
VIN Input Voltage 8.0 V
∆VOUT/
∆Topt
Output Voltage
Temperature Coefficient −40°C
<
=
Topt
<
=
85°C ±100 ppm
/°C
Vstart Start-Up Voltage VIN=0V→2V*1 0.7 0.8 V
∆Vstart/
∆Topt
Start-Up Voltage
Temperature Coefficient
-40°C
<
=
Topt
<
=
85°C
VIN=0V→2V*1 -1.6 mV/
°C
IDD2 Supply Current2 VOUT=VCE=Set VOUT+0.5V 2 5
µA
Istandby Supply Current (Standby) VOUT=6V, VCE=0V 0.5
µA
fosc Maximum Oscillator
Frequency VOUT=VCE=Set VOUT×0.96 80 100 120 kHz
∆fosc/
∆Topt
Frequency Temperature
Coefficient -40°C
<
=
Topt
<
=
85°C 0.41
kHz/
°C
Duty Oscillator Duty Cycle VOUT=VCE=Set VOUT×0.96,
ON (VLX “H” side) 70 77 85 %
VCEH CE “H” Input Voltage 0.3 V
VCEL CE “L” Input Voltage
VOUT=VCE=Set VOUT×0.96,
Judgment is made by the EXT
waveform 0.7 0.8 V
ICEH CE “H” Input Current VOUT=6.0V, VCE=6.0V -0.5 0.0 0.5 µA
ICEL CE “L” Input Current VOUT=6.0V, VCE=0.0V -0.5 0.0 0.5 µA
2.0V
<
=
VOUT
<
=
2.9V,EXT no load 20 40 µA
3.0V
<
=
VOUT
<
=
3.9V,EXT no load 25 50
3.0V
<
=
VOUT
<
=
3.4V,EXT no load 30 60
IDD1 Supply Current1 *2
3.5V
<
=
VOUT
<
=
3.9V,EXT no load 35 70
µA
2.0V
<
=
VOUT
<
=
2.4V, VEXT=0.4V -1.0
2.5V
<
=
VOUT
<
=
2.9V, VEXT=0.4V -1.5
EXT “H” Output Current
4.0V
<
=
VOUT
<
=
5.5V, VEXT=0.4V -2.0
2.0V
<
=
VOUT
<
=
2.9V, VEXT=0.4V 1.0
3.0V
<
=
VOUT
<
=
3.9V, VEXT=0.4V 1.5
IEXTH
EXT “L” Output Current
4.0V
<
=
VOUT
<
=
5.5V, VEXT=0.4V 2.0
mA
*1)Condition: An Output load resistor RL is connected between VOUT and GND.
Note that the resistor RL has a resistance which makes an output current 1mA after step-up operation.
*2)The Supply Current 1 (IDD1) for IC itself is measured when the internal oscillator works continuously.
If the oscillator works intermittently, the supply current becomes smaller than the value which is written on
the above table. Measurement condition: VOUT=VCE=Setting Output Voltage×0.96
RN5R
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TEST CIRCUITS
Lx
SBD
CLRL
GND
VOUT
L
VIN CE
V
CL
1kΩ
A
Lx
GND
VOUT
CE
Test Circuit 1 Test Circuit 2
CL
Oscilloscope
Lx
GND
VOUT
CE
Test Circuit 3
*)When VLXlim and ILX are measured, the 5Ω resistor is used. Otherwise 1kΩ is used.
Components Inductor (L) : 100µH, 220µH (Sumida Electric Co., Ltd; CD-54)
Diode (SBD) : MA721 (Matsushita Electronics Corporation; Schottky Type)
Capacitor (CL) : 47µF (Tantalum Type)
Using these test circuits characteristics data has been obtained as shown on the following pages.
Test Circuit 1: Typical Characteristics (1)-(7)
Test Circuit 2: Typical Characteristics (9)-(11)
Test Circuit 3: Typical Characteristics (8), (12)-(16)
RN5R
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SBD
C
L
Rb
Cb
L
V
IN
Tr
V
EXT
GND
V
OUT
CE
CL
A
EXT
GND
VOUT
CE
Test Circuit 1 Test Circuit 2
C
L
EXT
GND
V
OUT
CE
Oscilloscope
CL
Oscilloscope
EXT
100Ω
GND
VOUT
CE
Test Circuit 3 Test Circuit 4
Components Inductor (L) : 27µH (Sumida Electric Co., Ltd; CD-104)
Diode (SBD) : RB111C (Rohm Co., Ltd; Schottky Type)
Capacitor (CL) : 47µF×2(Tantalum Type)
Transistor (Tr) : 2SD1628G
Base Resistor (Rb) : 300W Base Capacitor (Cb): 0.01µF
The typical characteristics were obtained with using these test circuits.
Test Circuit 1: Typical Characteristics (1)-(5)
Test Circuit 2: Typical Characteristics (8)-(10)
Test Circuit 3: Typical Characteristics (11)-(14)
Test Circuit 4: Typical Characteristics (6), (7)
RN5R
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TYPICAL CHARACTERISTICS
● RN5RKxx1A/B
1) Output Voltage vs. Output Current (Topt=25°C)
RN5RK301A RN5RK301A
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0.0
Output Current
IOUT(mA)
Output Voltage
VOUT(V)
0 204060 16014080 100 120
L=100µH
1.0V 1.3V
1.5V
2.0V
V
IN
=0.9V
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0.0
Output Current
IOUT(mA)
Output Voltage
VOUT(V)
0 204060 16014080 100 120
L=220µH
1.0V 1.5V 2.0V
1.3V
V
IN
=0.9V
RN5RK301B RN5RK301B
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0.0
Output Current
I
OUT
(mA)
Output Voltage
V
OUT
(V)
0 102030 5040
L=100µH
1.5V
2.0V
1.3V
V
IN
=1.0V
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0.0
Output Current
I
OUT
(mA)
Output Voltage
V
OUT
(V)
0 102030 5040
L=220µH
1.5V 2.0V
1.3V
V
IN
=1.0V
RN5RK501A RN5RK501A
6
5
4
3
2
1
0
Output Current
I
OUT
(mA)
Output Voltage
V
OUT
(V)
0 50 100 150 200
L=100µH
1.5V
2.0V 3.0V
4.0V
V
IN
=0.9V
6
5
4
3
2
1
0
Output Current
IOUT(mA)
Output Voltage
VOUT(V)
0 50 100 150 200
L=220µH
1.5V 2.0V 3.0V
4.0V
V
IN
=0.9V
RN5R
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RN5RK501B RN5RK501B
6
5
4
3
2
1
0
Output Current
IOUT(mA)
Output Voltage
VOUT(V)
0 50 100 150 200
L=100µH
2.0V 2.5V 3.0V
4.0V
V
IN
=1.5V
6
5
4
3
2
1
0
Output Current
IOUT(mA)
Output Voltage
VOUT(V)
0 50 100 150 200
L=220µH
2.0V 2.5V 3.0V
4.0V
V
IN
=1.5V
2) Efficiency vs. Output Current (Topt=25°C)
RN5RK301A RN5RK301A
100
90
80
70
60
50
40
Output Current
IOUT(mA)
Efficiency
η(%)
0 20 40 60 16014080 100 120
L=100µH
1.0V
2.0V
VIN=0.9V 1.3V
1.5V
100
90
80
70
60
50
40
Output Current
I
OUT
(mA)
Efficiency
η(%)
0 20 40 60 16014080 100 120
L=220µH
1.0V 2.0V
VIN=0.9V1.3V
1.5V
RN5RK301B RN5RK301B
100
90
80
70
60
50
40
Output Current
IOUT(mA)
Efficiency
η(%)
0 102030 5040
L=100µH
1.5V 2.0V
1.3V
V
IN
=1.0V
100
90
80
70
60
50
Output Current
IOUT(mA)
Efficiency
η(%)
0 102030 5040
L=220µH
2.0V1.5V1.3V
V
IN
=1.0V
RN5R
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RN5RK501A RN5RK501A
100
90
80
70
60
50
40
Output Current
I
OUT
(mA)
Efficiency
η(%)
0 50 100 150 200
L=100µH
1.5V
2.0V 3.0V
4.0V
VIN=0.9V
100
90
80
70
60
50
40
Output Current
I
OUT
(mA)
Efficiency
η(%)
0 50 100 150 200
L=220µH
1.5V
2.0V
3.0V
4.0V
VIN=0.9V
RN5RK501B RN5RK501B
100
90
80
70
60
50
40
Output Current
I
OUT
(mA)
Efficiency
η(%)
0 50 100 150 200
L=100µH
2.0V 2.5V
VIN=1.5V
4.0V
3.0V
100
90
80
70
60
50
40
Output Current
I
OUT
(mA)
Efficiency
η(%)
0 50 100 150 200
L=220µH
2.0V 2.5V
VIN=1.5V
4.0V
3.0V
3) Ripple Voltage vs. Output Current (Topt=25°C)
RN5RK301A RN5RK301A
140
120
100
80
60
40
20
0
Output Current
I
OUT
(mA)
Ripple Voltage
Vr(mVp-p)
0 20 40 60 16014080 100 120
L=100 µH
1.5V
2.0V
VIN=0.9V
1.0V
1.3V
160
140
120
100
80
60
40
20
0
Output Current
I
OUT
(mA)
Ripple Voltage
Vr(mVp-p)
04020 8060 100 160140120
L=220µH
2.0V
VIN=0.9V
1.0V
1.3V 1.5V
RN5R
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RN5RK301B RN5RK301B
45
40
35
30
25
20
15
10
5
0
Output Current
IOUT(mA)
Ripple Voltage
Vr(mVp-p)
0 102030 5040
L=100µH
2.0V
V
IN
=1.0V
1.3V
1.5V
45
40
35
30
25
20
15
10
5
0
Output Current
IOUT(mA)
Ripple Voltage
Vr(mVp-p)
0 102030 5040
L=220µH
2.0V
1.3V1.0V
1.5V
RN5RK501A RN5RK501A
200
150
100
50
0
Output Current
I
OUT
(mA)
Ripple Voltage
Vr(mVp-p)
0 50 100 150 200
L=100µH
2.0V 4.0V
3.0V
1.5V
VIN=0.9V
200
150
100
50
0
Output Current
I
OUT
(mA)
Ripple Voltage
Vr(mVp-p)
0 50 100 150 200
L=220µH
2.0V 4.0V
3.0V
1.5V
VIN=0.9V
RN5RK501B RN5RK501B
140
120
100
80
60
40
20
0
Output Current
I
OUT
(mA)
Ripple Voltage
Vr(mVp-p)
0 50 100 150 200
L=100µH
4.0V
2.0V
3.0V
2.5V
VIN=1.5V
140
120
100
80
60
40
20
0
Output Current
I
OUT
(mA)
Ripple Voltage
Vr(mVp-p)
0 50 100 150 200
L=220µH
4.0V
3.0V
2.5V
VIN=1.5V
RN5R
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4) Start-up/Hold-on Voltage vs. Output Current (Topt=25 °C)
RN5RK301A RN5RK501A
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0.0
Output Current
I
OUT
(mA)
Start-up/Hold-on V oltage
Vstart/Vhold(V)
015105
L=100µH
Vstart
Vhold
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0.0
Output Current
IOUT(mA)
Start-up/Hold-on V oltage
Vstart/Vhold(V)
015105
L=100µH
Vhold
Vstart
RN5RK301B RN5RK501B
2.0
1.8
1.6
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0.0
Output Current
IOUT(mA)
Start-up/Hold-on V oltage
Vstart/Vhold(V)
015105
L=100µH
Vstart
Vhold
2.0
1.8
1.6
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0.0
Output Current
I
OUT
(mA)
Start-up/Hold-on V oltage
Vstart/Vhold(V)
015105
L=100µH
Vstart
Vhold
5) Output Voltage vs. Temperature
RN5RK301A RN5RK501A
3.10
3.05
3.00
2.95
2.90
Temperature Topt( )
Output Voltage
V
OUT
(V)
-50 -25 1007502550
V
IN
=1.5V,L=100µH
I
OUT
=0
m
A
I
OUT
=10
m
A
I
OUT
=30
m
A
5.10
5.05
5.00
4.95
4.90
Temperature Topt( )
Output Voltage
V
OUT
(V)
-50 -25 1007502550
VIN=3.0V,L=100µH
IOUT=30mA
IOUT=0mA
IOUT=10mA
RN5R
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6) Start-up Voltage vs. Temperature
RN5RK501A RN5RK501B
1
0.8
0.6
0.4
0
0.2
Temperature Topt( )
Start-up V oltage
Vstart(V)
-50 -25 1007502550
L=100 µH
1
0.8
0.6
0.4
0
0.2
Temperature Topt( )
Start-up V oltage
Vstart(V)
-50 -25 1007502550
L=100µH
7) Hold-on Voltage vs. Temperature
RN5RK501A RN5RK501B
1
0.8
0.6
0.4
0
0.2
Temperature Topt( )
Hold-on Voltage
Vhold(V)
-50 -25 1007502550
L=100µH
1
0.8
0.6
0.4
0
0.2
Temperature Topt( )
Hold-on Voltage
Vhold(V)
-50 -25 1007502550
L=100µH
8) Lx Switching Current vs. Temperature
RN5RK301A RN5RK501A
500
400
300
200
0
100
Temperature Topt( )
Lx
Switching Current
ILx(mA)
-50 -25 1007502550
500
400
300
200
0
100
Temperature Topt( )
Lx
Switching Current
ILx(mA)
-50 -25 1007502550
RN5R
K
15
9) Supply Current 1 vs. Temperature
RN5RK301A RN5RK501A
50
40
30
20
10
Temperature Topt( )
Supply Current
1 I
DD1
(
µ
A)
-50 -25 1007502550
80
70
60
50
30
40
Temperature Topt( )
Supply Current
1 I
DD1
(
µ
A)
-50 -25 1007502550
10) Supply Current 2 vs. Temperature 11) Standby Current 3 vs. Temperature
RN5RK301A RN5RK301A
5
4
3
2
0
1
Temperature Topt( )
Supply Current
2 I
DD2
(
µ
A)
-50 -25 1007502550
1
0.8
0.6
0.4
0
0.2
Temperature Topt( )
Supply Current
3 Istandby(
µ
A)
-50 -25 1007502550
12) Oscillator Duty Cycle vs. Temperature
RN5RK301A RN5RK301B
85
80
75
70
Temperature Topt( )
Oscullator Duty Cycle
Maxduty(
%
)
-50 -25 1007502550
60
58
56
54
50
52
Temperature Topt( )
Oscullator Duty Cycle
Maxduty(
%
)
-50 -25 1007502550
RN5R
K
16
13) CE “H” Input Voltage vs. Temperature 14) CE “L” Input Voltage vs. Temperature
RN5RK301A RN5RK301A
1
0.8
0.6
0.4
0
0.2
Temperature Topt( )
CE H
Input Voltage
V
CEH
(
V
)
-50 -25 1007502550
1
0.8
0.6
0.4
0
0.2
Temperature Topt( )
CE L
Input Voltage
V
CEL
(
V
)
-50 -25 1007502550
15) Maximum Oscillator Frequency vs. Temperature 16) VLX Voltage Limit vs. Temperature
RN5RK301A RN5RK301A
120
110
100
90
80
70
60
50
Temperature Topt( )
Maximum Oscillator Frequency fOSC
(kHz)
-50 -25 1007502550
0.8
0.7
0.6
0.5
0.4
Temperature Topt( )
V
Lx
Voltage Limit
V
Lx
(V)
-50 -25 1007502550
RN5R
K
17
● RN5RKxx2A
1) Output Voltage vs. Output Current (Topt=25°C)
RN5RK302A RN5RK502A
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0
Output Current
I
OUT
(mA)
Output Voltage
VOUT(V)
0 200 400 600 800
L=27µH
2.0V
1.0V
1.5V
1.3V
VIN=0.9V
6.0
5.0
4.0
3.0
2.0
1.0
0.0
Output Current
I
OUT
(mA)
Output Voltage
VOUT(V)
0 200 400 600 800
L=27µH
1.5V
2.0V 3.0V
VIN=1.0V
2) Efficiency vs. Output Current (Topt=25°C)
RN5RK302A RN5RK502A
100
90
80
70
60
50
40
Output Current
I
OUT
(mA)
Efficiency
η(%)
0 200 400 600 800
L=27µH
1.0V
2.0V
VIN=0.9V 1.3V 1.5V
100
90
80
70
60
50
30
40
Output Current
I
OUT
(mA)
Efficiency
η(%)
0 200 400 600 800
L=27µH
3.0V
1.5V
2.0V
VIN=1.0V
3) Ripple Voltage vs. Output Current (Topt=25°C)
RN5RK302A RN5RK502A
250
200
150
100
50
0
Output Current
I
OUT
(mA)
Ripple Voltage
Vr(mVp-p)
0 200 400 600 800
L=27µH
2.0V
1.5V
1.3V
1.0V
VIN=0.9V
300
250
200
150
100
50
0
Output Current
I
OUT
(mA)
Ripple Voltage
Vr(mVp-p)
0 200 400 600 800
L=27µH
3.0V
2.0V
1.5V
VIN=1.0V
RN5R
K
18
4) Start-up/Hold-on Voltage vs. Output Current (Topt=25°C)
RN5RK302A RN5RK502A
2.0
1.8
1.6
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0.0
Output Current
IOUT(mA)
Start-up/Hold-on V oltage
Vstart/Vhold(V)
0 20015010050
L=27µH
Vhold
Vstart
2.4
2.2
2.0
1.8
1.6
1.4
1.2
1.0
0.8
0.4
0.2
0.6
0.0
Output Current
I
OUT
(mA)
Start-up/Hold-on V oltage
Vstart/Vhold(V)
0 20015010050
L=27µH
Vstart,Vhold
5) Output Voltage vs. Temperature
RN5RK302A RN5RK502A
3.10
3.00
2.90
3.05
2.95
2.85
2.80
Temperature Topt( )
Output Voltage
VOUT(V)
-50 -25 1007502550
VIN=1.2V,L=27µH
IOUT=0mA
IOUT=50mA
IOUT=100mA
5.10
5.00
5.05
4.95
4.90
Temperature Topt( )
Output Voltage
V
OUT
(V)
-50 -25 1007502550
V
IN
=3.0V,L=27µH
I
OUT
=0
m
A
I
OUT
=50
m
A
I
OUT
=100
m
A
6) EXT “H” Output Current vs. Temperature
RN5RK302A RN5RK502A
10
9
8
7
6
5
4
0
3
2
1
Temperature Topt( )
EXT H
Output Current
IEXTH(mA)
-50 -25 1007502550
10
9
8
7
6
5
4
0
3
2
1
Temperature Topt( )
EXT H
Output Current
IEXTH(mA)
-50 -25 1007502550
RN5R
K
19
7) EXT “L” Output Current vs. Temperature
RN5RK302A RN5RK502A
20
18
16
14
12
10
8
0
6
4
2
Temperature Topt( )
EXT L
Output Current
I
EXTL
(mA)
-50 -25 1007502550
20
18
16
14
12
10
8
0
6
4
2
Temperature Topt( )
EXT L
Output Current
I
EXTL
(mA)
-50 -25 1007502550
8) Supply Current 1 vs. Temperature
RN5RK302A RN5RK502A
50
40
30
20
0
10
Temperature Topt( )
Supply Current
1 I
DD1
(
µ
A)
-50 -25 1007502550
50
40
30
20
0
10
Temperature Topt( )
Supply Current
1 I
DD1
(
µ
A)
-50 -25 1007502550
9) Supply Current 2 vs. Temperature 10) Standby Current vs. Temperature
RN5RK302A RN5RK302A
5
4
3
2
0
1
Temperature Topt( )
Supply Current
2 I
DD2
(
µ
A)
-50 -25 1007502550
1
0.8
0.6
0.4
0
0.2
Temperature Topt( )
Supply Current
3 Istandby(
µ
A)
-50 -25 1007502550
RN5R
K
20
11) Oscillator Duty Cycle vs. Temperature 12) Maximum Oscillator Frequency vs. Temperature
RN5RK302A RN5RK302A
85
80
75
70
Temperature Topt( )
Oscullator Duty Cycle
Maxduty(
%
)
-50 -25 1007502550
120
110
100
90
80
70
60
50
Temperature Topt( )
Maximum Oscillator Frequency
fOSC
(kHz)
-50 -25 1007502550
13) CE “H” Input Voltage vs. Temperature 14) CE “L” Input Voltage vs. Temperature
RN5RK302A RN5RK302A
1
0.8
0.6
0.4
0
0.2
Temperature Topt( )
CE H
Input Voltage
V
CEH
(
V
)
-50 -25 1007502550
1
0.8
0.6
0.4
0
0.2
Temperature Topt( )
CE L
Input Voltage
V
CEL
(
V
)
-50 -25 1007502550
PACKAGE INFORMATION PE-SOT-23-5-0510
• SOT-23-5 (SC-74A) Unit: mm
PACKAGE DIMENSIONS
2.9±0.2
0.4±0.1
1.9±0.2
(0.95) (0.95)
54
123
+0.2
−0.1
1.6
+0.2
−0.1
1.1
+0.1
−0.05
0.15
2.8±0.3
0 to 0.1
0.8±0.1
0.2 MIN.
TAPING SPECIFICATION
2.0MAX.
0.3±0.1
4.0±0.1
2.0±0.05
4.0±0.1
3.3
3.2
8.0±0.3
1.75±0.1
3.5±0.05
φ1.5+0.1
0
∅1.1±0.1
TR
User Direction of Feed
TAPING REEL DIMENSIONS
(1reel=3000pcs)
2±0.5
11.4±1.0
9.0±0.3
13±0.2
∅
60
∅+1
0
180
∅0
−1.5
21±0.8
PACKAGE INFORMATION PE-SOT-23-5-0510
POWER DISSIPATION (SOT-23-5)
This specification is at mounted on board. Power Dissipation (PD) depends on conditions of mounting on board.
This specification is based on the measurement at the condition below:
(Power Dissipation (SOT-23-5) is substitution of SOT-23-6.)
Measurement Conditions
Standard Land Pattern
Environment Mounting on Board (Wind velocity=0m/s)
Board Material Glass cloth epoxy plactic (Double sided)
Board Dimensions 40mm × 40mm × 1.6mm
Copper Ratio Top side : Approx. 50% , Back side : Approx. 50%
Through-hole φ0.5mm × 44pcs
Measurement Result
(Topt=25°C,Tjmax=125°C)
Standard Land Pattern Free Air
Power Dissipation 420mW 250mW
Thermal Resistance θja=(125−25°C)/0.42W=263°C/W 400°C/W
0 50 10025 75 85 125 150
Ambient Temperature (°C)
0
200
100
300
400
250
420
500
600
Power Dissipation P
D
(mW)
On Board
Free Air
40
40
Power Dissipation Measurement Board Pattern
IC Mount Area Unit : mm
RECOMMENDED LAND PATTERN
0.7 MAX.
0.95
0.95
1.9
2.4
1.0
(Unit: mm)
MARK INFORMATION ME-RN5RK-0310
RN5RK SERIES MARK SPECIFICATION
• SOT-23-5 (SC-74A)
1 2 3 4 5
1
,
2
: Product Code (refer to Part Number vs. Product Code)
3
,
4
: Lot Number
• Part Number vs. Product Code
Product Code Product Code Product Code Product Code
Part Number
1
2
Part Number
1
2
Part Number
1
2
Part Number
1
2
RN5RK301A W A RN5RK361A W K RN5RK251B X D RN5RK272A Y C
RN5RK241A W B RN5RK261A W L RN5RK301B X E RN5RK302A Y D
RN5RK501A W C RN5RK281A W M RN5RK331B X F RN5RK332A Y E
RN5RK201A W D RN5RK321A W N RN5RK361B X G RN5RK502A Y F
RN5RK251A W E RN5RK371A W P RN5RK501B X H RN5RK552A Y G
RN5RK331A W F RN5RK391A W Q RN5RK551B X J RN5RK522A Y H
RN5RK551A W G RN5RK271B X A RN5RK391B X K RN5RK222A Y J
RN5RK221A W H RN5RK201B X B RN5RK202A Y A RN5RK452A Y K
RN5RK271A W J
RN5RK221B X C
RN5RK252A Y B
