RN5RK482A-TR-FB [RICOH]
Switching Controller, Voltage-mode, 0.03A, 120kHz Switching Freq-Max, CMOS, PDSO5, MINI-MOLD, SC-74A, SOT-23, 5 PIN;
| 型号： | RN5RK482A-TR-FB |
| 厂家： | 
RICOH ELECTRONICS DEVICES DIVISION |
| 描述： | Switching Controller, Voltage-mode, 0.03A, 120kHz Switching Freq-Max, CMOS, PDSO5, MINI-MOLD, SC-74A, SOT-23, 5 PIN ISM频段 开关 光电二极管 |
| 文件： | 总23页 (文件大小：445K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
RN5RK SERIES
VFM STEP-UP DC/DC CONVERTER
OUTLINE
NO.EA-045-0602
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.
1
OUTLINE DIAGRAM
RN5RKxx1x
RN5RKxx2A
Vref
Vref
VLX limiter
Buffer
VOUT
GND
VOUT
GND
Lx 5
EXT 5
2
4
2
4
Buffer
LxSW
－
＋
－
VFM Control
OSC 100kHz
Chip Enable
VFM Control
OSC 100kHz
Chip Enable
＋
Error Amp.
Error Amp.
1
1
CE
CE
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
Setting Output Voltage (VOUT) :
a
Stepwise setting with a step of 0.1V in the range of 2.0V to 5.5V is possible.
Designation of Driver
1: Internal Lx Tr. Driver
2: External Tr. Driver
b
Designation of Duty Cycle
c
A: 77%
B: 55%
Designation of Taping type
d
Ex. TR, TL (refer to Taping Specifications, TR type is prescribed as a standard.)
2
PIN CONFIGURATIONS
• SOT-23-5
5
4
(mark side)
1
2
3
PIN DISCRIPTION
• RN5RKxx1x
• RN5RKxx2x
Pin No. Symbol
Description
Chip Enable Pin
Pin No. Symbol
Description
Chip Enable Pin
1
CE
1
CE
Step-up Output Monitoring Pin,
Step-up Output Monitoring Pin,
2
VOUT
2
VOUT
Power Supply (for device itself)
Power Supply (for device itself)
3
4
NC
No Connection
Ground Pin
3
4
NC
No Connection
Ground Pin
GND
GND
Switching Pin
External Tr. Drive Pin
5
LX
5
EXT
(Nch Open Drain)
(CMOS Output)
ABSOLUTE MAXIMUM RATINGS
Symbol
VOUT
VLX
Item
Step-up Output Pin Voltage
LX Pin Voltage
Rating
9.0
Unit
V
9.0
V
VEXT
VCE
EXT Pin Voltage
–0.3 to VOUT+0.3
–0.3 to VOUT+0.3
500
V
CE Pin Voltage
V
ILX
Lx Pin Output Current
EXT Pin Output Current
Power Dissipation (SOT-23-5)*1
Operating Temperature Range
Storage Temperature Range
mA
mA
mW
°C
°C
IEXT
±30
420
PD
Topt
Tstg
–40 to +85
–55 to +125
*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.
3
ELECTRICAL CHARACTERISTICS
• RN5RKxx1A/xx1B
Topt=25°C
Symbol
VOUT
Item
Output Voltage
Input Voltage
Conditions
VIN=Set VOUT×0.6, IOUT=1mA
Min.
×0.975
Typ.
Max.
×1.025
8.0
Unit
V
V
VIN
ppm
∆VOUT/
Output Voltage
−40°C Topt 85°C
±100
0.75
-1.6
=
=
Temperature Coefficient
/°C
∆Topt
VIN=0V→2V*1
Vstart
Start-Up Voltage
0.90
V
mV/
°C
-40°C Topt 85°C
∆Vstart/ Start-Up Voltage
=
=
VIN=0V→2V*1
Temperature Coefficient
∆Topt
Vhold
Vhold
IDD2
VIN=2V→0V*1
VIN=2V→0V*1
Hold-on Voltage (xx1A)
Hold-on Voltage (xx1B)
Supply Current2
0.7
0.9
V
V
2
5
0.5
1
VOUT=VCE=Set VOUT+0.5V
VOUT=6V, VCE=0V
VOUT=VLX=8V
µA
µA
µA
Istandby Supply Current (Standby)
ILXleak
Lx Leakage Current
Maximum Oscillator
fosc
80
100
120
kHz
VOUT=VCE=Set VOUT×0.96
Frequency
kHz/
°C
∆fosc/
∆Topt
Frequency Temperature
Coefficient
-40°C Topt 85°C
0.41
=
=
Oscillator Duty Cycle (xx1A)
Oscillator Duty Cycle (xx1B)
VLX Voltage Limit
70
47
77
55
85
63
%
%
V
VOUT=VCE=Set VOUT×0.96,
Duty
ON (VLX “L” side)
VOUT=VCE=1.95, Lx Switch ON
Vlxlim
0.4
0.9
0.6
0.8
VOUT=VCE=Set VOUT×0.96,
Judgment is made by the Lx
waveform
VCEH
CE “H” Input Voltage
V
VCEL
CE “L” Input Voltage
0.3
V
ICEH
ICEL
CE “H” Input Current
CE “L” Input Current
-0.5
-0.5
0.0
0.0
25
30
35
40
45
50
60
0.5
0.5
50
55
60
65
75
80
90
VOUT=6.0V, VCE=6.0V
VOUT=6.0V, VCE=0.0V
µA
µA
µA
2.0V
2.5V
3.0V
3.5V
4.0V
4.5V
5.0V
VOUT
VOUT
2.4V
2.9V
3.4V
3.9V
4.4V
4.9V
5.5V
=
=
=
=
=
=
=
=
=
=
=
=
=
=
VOUT
IDD1
Supply Current1 *2
VOUT
VOUT
VOUT
VOUT
µA
4
Symbol
Item
Conditions
Min.
80
Typ.
Max.
Unit
2.0V
2.5V
3.0V
3.5V
4.0V
4.5V
5.0V
VOUT
2.4V, VLX=0.4V
=
=
=
=
=
=
=
=
=
=
=
=
=
=
100
120
140
160
180
200
VOUT
VOUT
VOUT
VOUT
VOUT
VOUT
2.9V, VLX=0.4V
3.4V, VLX=0.4V
3.9V, VLX=0.4V
4.4V, VLX=0.4V
4.9V, VLX=0.4V
5.5V, VLX=0.4V
ILX
Lx Switching Current
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
5
• RN5RKxx2A
Topt=25°C
Symbol
VOUT
VIN
Item
Output Voltage
Input Voltage
Conditions
VIN=Set VOUT×0.6, IOUT=1mA
Min.
×0.975
Typ.
Max.
×1.025
8.0
Unit
V
V
ppm
∆VOUT/
Output Voltage
−40°C Topt 85°C
±100
=
=
Temperature Coefficient
/°C
∆Topt
VIN=0V→2V*1
Vstart
Start-Up Voltage
0.7
0.8
V
-40°C Topt 85°C
mV/
∆Vstart/ Start-Up Voltage
=
=
-1.6
VIN=0V→2V*1
°C
Temperature Coefficient
Supply Current2
∆Topt
IDD2
2
5
VOUT=VCE=Set VOUT+0.5V
VOUT=6V, VCE=0V
µA
µA
Istandby Supply Current (Standby)
0.5
Maximum Oscillator
fosc
80
70
100
0.41
77
120
kHz
VOUT=VCE=Set VOUT×0.96
Frequency
kHz/
°C
∆fosc/
∆Topt
Frequency Temperature
-40°C Topt 85°C
=
=
Coefficient
VOUT=VCE=Set VOUT×0.96,
Duty
Oscillator Duty Cycle
85
%
ON (VLX “H” side)
VOUT=VCE=Set VOUT×0.96,
Judgment is made by the EXT
waveform
VCEH
VCEL
CE “H” Input Voltage
CE “L” Input Voltage
0.3
0.8
V
V
0.7
ICEH
ICEL
CE “H” Input Current
CE “L” Input Current
-0.5
-0.5
0.0
0.0
20
25
30
35
0.5
0.5
40
VOUT=6.0V, VCE=6.0V
VOUT=6.0V, VCE=0.0V
µA
µA
µA
2.0V
3.0V
3.0V
3.5V
2.0V
2.5V
4.0V
2.0V
3.0V
4.0V
VOUT
VOUT
2.9V,EXT no load
3.9V,EXT no load
3.4V,EXT no load
=
=
=
=
=
=
=
=
=
=
=
=
=
=
=
=
=
=
=
=
50
IDD1
Supply Current1 *2
µA
VOUT
60
VOUT
VOUT
VOUT
VOUT
VOUT
VOUT
VOUT
3.9V,EXT no load
2.4V, VEXT=0.4V
2.9V, VEXT=0.4V
5.5V, VEXT=0.4V
2.9V, VEXT=0.4V
3.9V, VEXT=0.4V
5.5V, VEXT=0.4V
70
-1.0
-1.5
-2.0
EXT “H” Output Current
EXT “L” Output Current
IEXTH
mA
1.0
1.5
2.0
*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
6
TEST CIRCUITS
SBD
1kΩ
L
Lx
VOUT
Lx
VOUT
V
RL
A
CL
V
IN
CL
GND
CE
GND
CE
Test Circuit 1
Test Circuit 2
Lx
VOUT
CL
GND
CE
Oscilloscope
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)
(SBD) : MA721 (Matsushita Electronics Corporation; Schottky Type)
(CL) : 47µF (Tantalum Type)
Diode
Capacitor
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)
7
SBD
Rb
Cb
L
Tr
EXT
V
OUT
EXT
V
OUT
V
A
CL
V
IN
GND
CE
GND
CE
CL
Test Circuit 1
Test Circuit 2
100Ω
EXT
VOUT
EXT
VOUT
Oscilloscope
CL
GND
CE
CL
GND
CE
Oscilloscope
Test Circuit 3
Test Circuit 4
Components Inductor
Diode
(L)
: 27µH (Sumida Electric Co., Ltd; CD-104)
(SBD) : RB111C (Rohm Co., Ltd; Schottky Type)
Capacitor
(CL) : 47µF×2(Tantalum Type)
(Tr)
(Rb) : 300W Base Capacitor (Cb): 0.01µF
Transistor
Base Resistor
: 2SD1628G
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)
8
TYPICAL CHARACTERISTICS
●RN5RKxx1A/B
1) Output Voltage vs. Output Current (Topt=25°C)
RN5RK301A
RN5RK301A
L=100µH
L=220µH
3.5
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0.0
3.0
2.0V
2.5
1.3V
1.0V
IN=0.9V
1.5V
1.3V
2.0V
1.0V
2.0
1.5
1.0
0.5
0.0
V
V
IN=0.9V
1.5V
0
0
0
20 40 60 80 100 120 140 160
Output Current OUT(mA)
0
0
0
20 40 60 80 100 120 140 160
Output Current OUT(mA)
I
I
RN5RK301B
RN5RK301B
L=100µH
L=220µH
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0.0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0.0
2.0V
2.0V
1.5V
1.3V
1.3V
1.5V
V
IN=1.0V
V
IN=1.0V
10
20
30
40
50
10
20
30
40
50
Output Current
I
OUT(mA)
Output Current
I
OUT(mA)
RN5RK501A
RN5RK501A
L=220µH
L=100µH
4.0V
6
5
4
3
2
1
0
6
5
4
3
2
1
0
4.0V
2.0V
1.5V
3.0V
1.5V
2.0V
3.0V
V
IN=0.9V
V
IN=0.9V
50
100
150
200
50
100
150
200
Output Current
I
OUT(mA)
Output Current
I
OUT(mA)
9
RN5RK501B
RN5RK501B
L=100µH
L=220µH
4.0V
6
5
4
3
2
1
0
6
5
4
3
2
1
0
4.0V
3.0V
2.5V
3.0V
2.0V
2.0V
2.5V
V
IN=1.5V
V
IN=1.5V
0
50
100
150
200
0
50 150
100
200
Output Current
I
OUT(mA)
Output Current IOUT(mA)
2) Efficiency vs. Output Current (Topt=25°C)
RN5RK301A
RN5RK301A
L=220µH
L=100µH
100
90
80
70
60
50
40
100
90
80
70
60
50
40
2.0V
2.0V
1.0V
1.5V
1.3V
1.5V
1.0V
IN=0.9V
V
IN=0.9V
V
1.3V
20 40 60 80 100 120 140 160
Output Current OUT(mA)
0
20 40 60 80 100 120 140 160
Output Current OUT(mA)
0
I
I
RN5RK301B
RN5RK301B
L=100µH
L=220µH
100
90
80
70
60
50
40
100
90
80
70
60
50
2.0V
1.5V
1.3V
IN=1.0V
1.3V
1.5V
2.0V
V
V
IN=1.0V
0
10
20
30
40
50
0
10
20
30
40
50
Output Current
I
OUT(mA)
Output Current
I
OUT(mA)
10
RN5RK501A
RN5RK501A
L=100µH
L=220µH
100
90
80
70
60
50
40
100
90
80
70
60
50
40
4.0V
4.0V
3.0V
2.0V
1.5V
3.0V
V
IN=0.9V
1.5V
V
IN=0.9V
2.0V
0
50
100
150
200
0
50
100
150
200
Output Current
I
OUT(mA)
Output Current
I
OUT(mA)
RN5RK501B
RN5RK501B
L=100µH
L=220µH
100
90
80
70
60
50
40
100
90
80
70
60
50
40
4.0V
2.0V
2.0V
4.0V
2.5V
2.5V
3.0V
3.0V
V
IN=1.5V
V
IN=1.5V
0
50
100
150
200
0
50 150
100
200
Output Current
I
OUT(mA)
Output Current IOUT(mA)
3) Ripple Voltage vs. Output Current (Topt=25°C)
RN5RK301A
RN5RK301A
L=100 µH
L=220µH
140
160
140
120
100
80
1.5V
120
100
1.3V
2.0V
80
2.0V
1.5V
1.3V
60
60
40
40
1.0V
1.0V
20
20
V
IN=0.9V
V
IN=0.9V
20 40 60 80 100 120 140 160
Output Current OUT(mA)
0
0
0
20 40 60 80 100 120 140 160
Output Current OUT(mA)
0
I
I
11
RN5RK301B
RN5RK301B
L=100µH
L=220µH
45
40
35
30
25
20
15
10
5
45
40
35
30
25
20
15
10
5
2.0V
2.0V
1.0V 1.3V
1.5V
1.3V
1.5V
V
IN=1.0V
0
0
0
0
0
10
20
30
40
50
0
0
0
10
20
30
40
50
Output Current
I
OUT(mA)
Output Current
I
OUT(mA)
RN5RK501A
RN5RK501A
L=100µH
L=220µH
200
150
100
50
200
150
100
50
3.0V
3.0V
2.0V
4.0V
4.0V
2.0V
1.5V
1.5V
IN=0.9V
50
Output Current
V
V
IN=0.9V
50
Output Current
0
0
100
150
200
100
150
200
I
OUT(mA)
I
OUT(mA)
RN5RK501B
RN5RK501B
L=100µH
L=220µH
140
120
100
80
140
120
100
80
3.0V
3.0V
4.0V
4.0V
60
60
2.0V
40
40
2.5V
2.5V
100
20
20
V
IN=1.5V
V
IN=1.5V
50
0
0
50
100
150
200
150
200
Output Current
I
OUT(mA)
Output Current
I
OUT(mA)
12
4) Start-up/Hold-on Voltage vs. Output Current (Topt=25 °C)
RN5RK301A
RN5RK501A
L=100µH
L=100µH
1.4
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0.0
1.2
1.0
Vstart
Vstart
0.8
0.6
Vhold
0.4
Vhold
0.2
0.0
0
5
10
15
0
5
10
15
Output Current
I
OUT(mA)
Output Current
I
OUT(mA)
RN5RK301B
RN5RK501B
L=100µH
L=100µH
2.0
1.8
1.6
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0.0
2.0
1.8
1.6
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0.0
Vstart
Vstart
Vhold
Vhold
0
5
10
15
0
5
10
15
Output Current IOUT(mA)
Output Current IOUT(mA)
5) Output Voltage vs. Temperature
RN5RK301A
RN5RK501A
VIN=3.0V,L=100µH
V
IN=1.5V,L=100µH
5.10
3.10
5.05
5.00
4.95
4.90
3.05
I
OUT=0
mA
I
OUT=10mA
3.00
2.95
2.90
I
OUT=30mA
I
OUT=0mA
I
OUT=30
mA
I
OUT=10mA
-50
-25
0
25
50
75
100
-50
-25
0
25
50
75
100
Temperature Topt(
)
Temperature Topt( )
13
6) Start-up Voltage vs. Temperature
RN5RK501A
RN5RK501B
L=100µH
L=100 µH
1
0.8
0.6
0.4
0.2
0
1
0.8
0.6
0.4
0.2
0
-50
-25
0
25
50
75
100
-50
-25
0
25
50
75
100
Temperature Topt(
)
Temperature Topt(
)
7) Hold-on Voltage vs. Temperature
RN5RK501A
RN5RK501B
L=100µH
L=100µH
1
1
0.8
0.6
0.4
0.2
0
0.8
0.6
0.4
0.2
0
-50
-25
0
25
50
75
100
-50
-25
0
25
50
75
100
Temperature Topt(
)
Temperature Topt( )
8) Lx Switching Current vs. Temperature
RN5RK301A
RN5RK501A
500
500
400
300
200
100
0
400
300
200
100
0
-50
-25
0
25
50
75
100
-50
-25
0
25
50
75
100
Temperature Topt(
)
Temperature Topt(
)
14
9) Supply Current 1 vs. Temperature
RN5RK301A
RN5RK501A
50
80
70
60
50
40
30
40
30
20
10
-50
-25
0
25
50
75
75
75
100
100
100
-50
-25
0
25
50
75
75
75
100
Temperature Topt(
)
Temperature Topt(
)
)
)
10) Supply Current 2 vs. Temperature
11) Standby Current 3 vs. Temperature
RN5RK301A
RN5RK301A
5
1
4
3
2
1
0
0.8
0.6
0.4
0.2
0
-50
-25
0
25
50
-50
-25
0
25
50
100
Temperature Topt(
)
Temperature Topt(
12) Oscillator Duty Cycle vs. Temperature
RN5RK301A
RN5RK301B
85
60
58
56
54
52
50
80
75
70
-50
-25
0
25
50
-50
-25
0
25
50
100
Temperature Topt(
)
Temperature Topt(
15
13) CE “H” Input Voltage vs. Temperature
14) CE “L” Input Voltage vs. Temperature
RN5RK301A
RN5RK301A
1
1
0.8
0.6
0.4
0.2
0
0.8
0.6
0.4
0.2
0
-50
-25
0
25
50
75
100
-50
-25
0
25
50
75
100
Temperature Topt(
)
Temperature Topt(
)
15) Maximum Oscillator Frequency vs. Temperature
16) VLX Voltage Limit vs. Temperature
RN5RK301A
RN5RK301A
120
110
100
90
0.8
0.7
0.6
0.5
0.4
80
70
60
50
-50
-25
0
25
50
75
100
-50
-25
0
25
50
75
100
Temperature Topt(
)
Temperature Topt(
)
16
●RN5RKxx2A
1) Output Voltage vs. Output Current (Topt=25°C)
RN5RK302A
RN5RK502A
L=27µH
L=27µH
3.5
6.0
5.0
4.0
3.0
2.0
1.0
0.0
3.0
2.0V
3.0V
2.0V
2.5
2.0
1.5
1.5V
V
IN=1.0V
1.0
0.5
0
1.5V
1.3V
V
IN=0.9V
1.0V
0
200
400
600
OUT(mA)
800
0
0
0
200
400
600
800
Output Current
I
Output Current
I
OUT(mA)
2) Efficiency vs. Output Current (Topt=25°C)
RN5RK302A
RN5RK502A
L=27µH
L=27µH
100
90
80
70
60
50
40
100
90
80
70
60
50
40
30
3.0V
2.0V
2.0V
V
IN=1.0V
1.5V
1.5V
400
1.3V
400
1.0V
V
IN=0.9V
0
200
600
OUT(mA)
800
200
600
OUT(mA)
800
Output Current
I
Output Current
I
3) Ripple Voltage vs. Output Current (Topt=25°C)
RN5RK302A
RN5RK502A
L=27µH
L=27µH
250
300
250
200
150
100
50
2.0V
2.0V
1.5V
1.3V
3.0V
200
150
100
50
1.5V
1.0V
V
IN=1.0V
V
IN=0.9V
0
0
0
200
400
600
800
200
400
600
800
Output Current
I
OUT(mA)
Output Current
I
OUT(mA)
17
4) Start-up/Hold-on Voltage vs. Output Current (Topt=25°C)
RN5RK302A
RN5RK502A
L=27µH
L=27µH
2.0
2.4
2.2
2.0
1.8
1.6
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0.0
1.8
1.6
1.4
1.2
Vstart,Vhold
V
start
1.0
0.8
0.6
0.4
0.2
0.0
V
hold
0
50
100
150
200
0
50
100
150
200
Output Current IOUT(mA)
Output Current
I
OUT(mA)
5) Output Voltage vs. Temperature
RN5RK302A
RN5RK502A
V
IN=1.2V,L=27µH
V
IN=3.0V,L=27µH
3.10
3.05
3.00
2.95
2.90
2.85
2.80
5.10
5.05
5.00
4.95
4.90
I
OUT=0mA
I
OUT=0mA
I
OUT=100
mA
OUT=50mA
I
OUT=50
m
A
I
I
OUT=100
mA
-50
-25
0
25
50
75
100
-50
-25
0
25
50
75
100
Temperature Topt(
)
Temperature Topt(
)
6) EXT “H” Output Current vs. Temperature
RN5RK302A
RN5RK502A
10
10
9
8
7
6
5
4
3
2
1
0
9
8
7
6
5
4
3
2
1
0
-50
-25
0
25
50
75
100
-50
-25
0
25
50
75
100
Temperature Topt(
)
Temperature Topt(
)
18
7) EXT “L” Output Current vs. Temperature
RN5RK302A
RN5RK502A
20
20
18
16
14
12
10
8
18
16
14
12
10
8
6
6
4
4
2
2
0
0
-50
-25
0
25
50
75
75
75
100
100
100
-50
-25
0
25
50
75
75
75
100
Temperature Topt(
)
)
)
Temperature Topt(
)
)
)
8) Supply Current 1 vs. Temperature
RN5RK302A
RN5RK502A
50
50
40
30
20
10
0
40
30
20
10
0
-50
-25
0
25
50
-50
-25
0
25
50
100
Temperature Topt(
Temperature Topt(
9) Supply Current 2 vs. Temperature
10) Standby Current vs. Temperature
RN5RK302A
RN5RK302A
5
1
4
3
2
1
0
0.8
0.6
0.4
0.2
0
-50
-25
0
25
50
-50
-25
0
25
50
100
Temperature Topt(
Temperature Topt(
19
11) Oscillator Duty Cycle vs. Temperature
12) Maximum Oscillator Frequency vs. Temperature
RN5RK302A
RN5RK302A
85
120
110
100
90
80
75
70
80
70
60
50
-50
-50
-25
0
25
50
75
100
-25
0
25
50
75
100
Temperature Topt(
)
Temperature Topt(
)
13) CE “H” Input Voltage vs. Temperature
14) CE “L” Input Voltage vs. Temperature
RN5RK302A
RN5RK302A
1
1
0.8
0.6
0.4
0.2
0
0.8
0.6
0.4
0.2
0
-50
-25
0
25
50
75
100
-50
-25
0
25
50
75
100
Temperature Topt( )
Temperature Topt(
)
20
PE-SOT-23-5-0510
PACKAGE INFORMATION
• SOT-23-5 (SC-74A)
Unit: mm
PACKAGE DIMENSIONS
2.9 0.2
1.9 0.2
+0.2
−0.1
1.1
(0.95)
(0.95)
0.8 0.1
5
4
0 to 0.1
1
2
3
+0.1
−0.05
0.15
0.4 0.1
TAPING SPECIFICATION
4.0±0.1
+0.1
0
φ1.5
2.0±0.05
0.3±0.1
3.3
4.0±0.1
2.0MAX.
∅1.1 0.1
TR
User Direction of Feed
TAPING REEL DIMENSIONS
(1reel=3000pcs)
11.4 1.0
9.0 0.3
2 0.5
21 0.8
PE-SOT-23-5-0510
PACKAGE INFORMATION
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
Board Material
Board Dimensions
Copper Ratio
Mounting on Board (Wind velocity=0m/s)
Glass cloth epoxy plactic (Double sided)
40mm × 40mm × 1.6mm
Top side : Approx. 50% , Back side : Approx. 50%
Through-hole
φ0.5mm × 44pcs
Measurement Result
(Topt=25°C,Tjmax=125°C)
Standard Land Pattern
420mW
Free Air
250mW
Power Dissipation
Thermal Resistance
θja=(125−25°C)/0.42W=263°C/W
400°C/W
600
40
500
On Board
420
400
Free Air
300
250
200
100
0
0
25
50
75 85 100
125
150
Ambient Temperature (°C)
Power Dissipation
Measurement Board Pattern
IC Mount Area Unit : mm
RECOMMENDED LAND PATTERN
0.7 MAX.
1.0
2.4
0.95
1.9
0.95
(Unit: mm)
ME-RN5RK-0310
MARK INFORMATION
RN5RK SERIES MARK SPECIFICATION
• SOT-23-5 (SC-74A)
1
3
2
4
,
,
: Product Code (refer to Part Number vs. Product Code)
: Lot Number
1
2
3
4
5
• Part Number vs. Product Code
Product Code
Product Code
Product Code
Product Code
Part Number
Part Number
Part Number
Part Number
1
2
1
2
1
2
1
2
RN5RK301A
RN5RK241A
RN5RK501A
RN5RK201A
RN5RK251A
RN5RK331A
RN5RK551A
RN5RK221A
RN5RK271A
W
W
W
W
W
W
W
W
W
A
B
C
D
E
F
G
H
J
RN5RK361A
RN5RK261A
RN5RK281A
RN5RK321A
RN5RK371A
RN5RK391A
RN5RK271B
RN5RK201B
RN5RK221B
W
W
W
W
W
W
X
K
L
RN5RK251B
RN5RK301B
RN5RK331B
RN5RK361B
RN5RK501B
RN5RK551B
RN5RK391B
RN5RK202A
RN5RK252A
X
X
X
X
X
X
X
Y
Y
D
E
F
G
H
J
K
A
B
RN5RK272A
RN5RK302A
RN5RK332A
RN5RK502A
RN5RK552A
RN5RK522A
RN5RK222A
RN5RK452A
Y
Y
Y
Y
Y
Y
Y
Y
C
D
E
F
G
H
J
M
N
P
Q
A
B
C
X
X
K
相关型号：
RN5RK491A-TL-FB
Switching Regulator, Voltage-mode, 0.5A, 120kHz Switching Freq-Max, CMOS, PDSO5, MINI-MOLD, SC-74A, SOT-23, 5 PIN
RICOH
RN5RK491A-TR-F
Switching Regulator, 100kHz Switching Freq-Max, CMOS, PDSO5, ROHS COMPLIANT, SOT-23, 5 PIN
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RN5RK491A-TR-FB
Switching Regulator, Voltage-mode, 0.5A, 120kHz Switching Freq-Max, CMOS, PDSO5, MINI-MOLD, SC-74A, SOT-23, 5 PIN
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