Ricoh RV5VH User Manual
APPLICATION MANUAL
DC/DC CONVERTER
CONTROLLER
RV5VH SERIES
NO. EA-049-9803
ELECTRONIC DEVICES DIVISION
NOTICE
1. The products and the product specifications described in this application manual are subject to change or
discontinuation of production without notice for reasons such as improvement. Therefore, before deciding to
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4. The technical information described in this application manual shows typical characteristics of and example
application circuits for the products. The release of such information is not to be construed as a warranty of or a
grant of license under Ricoh's or any third party's intellectual property rights or any other rights.
5. The products listed in this document are intended and designed for use as general electronic components in
standard applications (office equipment, computer equipment, measuring instruments, consumer electronic
products, amusement equipment etc.). Those customers intending to use a product in an application requiring
extreme quality and reliability, for example, in a highly specific application where the failure or misoperation of
the product could result in human injury or death (aircraft, spacevehicle, nuclear reactor control system, traffic
control system, automotive and transportation equipment, combustion equipment, safety devices, life support
system etc.) should first contact us.
6. We are making our continuous effort to improve the quality and reliability of our products, but semiconductor
products are likely to fail with certain probability. In order prevent any injury to persons or damages to property
resulting from such failure, customers should be careful enough to incorporate safety measures in their design,
such as redundancy feature, fire-containment feature and fail-safe feature. We do not assume any liability or
responsibility for any loss or damage arising from misuse or inappropriate use of the products.
7. Anti-radiation design is not implemented in the products described in this application manual.
8. Please contact Ricoh sales representatives should you have any questions or comments concerning the
products or the technical information.
June 1995
RV5VH SERIES
APPLICATION MANUAL
CONTENTS
OUTLINE
......................................................................................................
1
FEATURES
...................................................................................................
1
APPLICATIONS
.............................................................................................
1
RV5VH1
××
/RV5VH2
××
BLOCK DIAGRAMS
...................................................................................
2
PIN CONFIGURATION
................................................................................
3
PIN DESCRIPTION
....................................................................................
3
ABSOLUTE MAXIMUM RATINGS
...............................................................
4
ELECTRICAL CHARACTERISTICS
.............................................................
6
OPERATION
............................................................................................
18
OPERATION OF STEP-UP DC/DC CONVERTER
........................................
21
SELECTION OF PERIPHERAL COMPONENTS
.........................................
22
TYPICAL APPLICATION
...........................................................................
23
TEST CIRCUITS
.......................................................................................
24
TYPICAL CHARACTERISTICS
..................................................................
26
• DC/DC Converter 1
1) Output Voltage vs. Output Current (RV5VH1
××)
...............................................
26
2) Output Voltage vs. Output Current (RV5VH2××)
...............................................
26
3) Efficiency vs. Output Current (RV5VH1××)
......................................................
27
4) Efficiency vs. Output Current (RV5VH2××)
......................................................
27
5) DC/DC1 Output Voltage vs. Temperature
........................................................
28
6) Oscillator Frequency vs. Temperature
............................................................
28
7) Oscillator Duty Cycle vs. Temperature
...........................................................
28
8) On Resistance of LX vs. Supply Voltage
.........................................................
29
9) EXT1 Output Current vs. Temperature
...........................................................
29
10) Start-up/Hold-on Voltage vs. Output Current
....................................................
29
11) Input Current vs. Intput Voltage
...................................................................
29
• DC/DC Converter 2
12) Output Voltage vs. Output Current
................................................................
30
13) DC/DC2 Feed Back Voltage vs. Temperature
...................................................
30
14) EXT2 Output Current vs. Temperature
...........................................................
30
15) EXT2 Oscillator Frequency vs. Temperature
....................................................
31
16) EXT2 Oscillator Duty Cycle vs. Temperature
....................................................
31
17) CSW ON/OFF Voltage vs. Temperature
........................................................
31
• Voltage Detector
18) Detector Threshold Voltage vs. Temperature
...................................................
32
19) VOUT1 Output Voltage vs. Output Current
........................................................
32
20) DOUT Output Current vs. VOUT1 Output Voltage
...............................................
32
21) VSEN Output Current vs. VSEN Output Voltage
................................................
32
22) Output Delay Time vs. Load Capacitance
.......................................................
32
RV5VH3
××
BLOCK DIAGRAMS
.................................................................................
33
PIN CONFIGURATION
..............................................................................
33
PIN DESCRIPTION
...................................................................................
34
ABSOLUTE MAXIMUM RATINGS
.............................................................
34
ELECTRICAL CHARACTERISTICS
...........................................................
35
OPERATION
............................................................................................
38
TYPICAL APPLICATION1
.........................................................................
41
TYPICAL APPLICATION2
.........................................................................
42
TYPICAL APPLICATION3
.........................................................................
43
TYPICAL CHARACTERISTICS
..................................................................
44
1) Output Voltage vs. Output Current
................................................................
44
2) Efficiency vs. Output Current
......................................................................
44
3) CSW Load Transient Responce 1
................................................................
44
4) CSW Load Transient Responce 2
................................................................
44
SELECTION GUIDE
.....................................................................................
45
PACKAGE DIMENSION
................................................................................
46
TAPING SPECIFICATION
.............................................................................
46
1
DC/DC CONVERTER CONTROLLER
RV5VH SERIES
OUTLINE
The RV5VH series are dual output CMOS DC/DC converter ICs integrating Step-up and inverting DC/DC converters.
The RV5VH3
×× series ICs consist of an oscillator, two VFM control circuits, control transistors(EXT switches), a phase
shift circuit, a voltage reference unit, an error amplifier, and voltage sensing resistors. The RV5VH series are housed in 8pin
SSOP(0.65mm pitch) and suitable for two supply systems such as pager, PDA, which need power supplies for LCD.
RV5VH1
×× and RV5VH2×× series are able to provide two DC/DC converter systems, one system is step-up converter
with internally fixed output and another is inverting converter system with user adjustable output by external resistors. A
voltage detector with sensing pin is also included. RV5VH3
×× series are able to provide two DC/DC converter systems,
both of boost converter, DC/DC1, and inverting one, DC/DC2, can operate with external transistors being adjustable output by resistors. Further more reset output is available.
FEATURES
• Dual DC/DC converter system
.................................
DC/DC1 : step-up
DC/DC2 : inverting(negative voltage)
• Voltage Detector
..........................................................
Nch. Open Drain Output
• Low voltage operation available
RV5VH1
××,RV5VH2××
..........................................
oscillator start-up from 0.8V
RV5VH3
××
.................................................................
oscillator start-up from 1.8V
• High Efficiency
.............................................................
TYP. 80%
• Low Supply Current
• High accuracy feedback sensing
...............................
TYP. ±2.5%
• Sleep Mode
RV5VH1
××, RV5VH2××
..........................................
DC/DC 2
RV5VH3
××
.................................................................
DC/DC1, 2
• Available to adjust temperature drift
.........................
DC/DC2 : with external resistor (RV5VH2
××, RV5VH3××)
coefficient of output voltage
• Small Package
..............................................................
8pin SSOP(0.65mm pitch)
APPLICATIONS
• Power source for telecommunication system
• Power source for portable data processing system, e.g. PDA, Electronic Data Banks
• Power source for Audio-Visual system, e.g. CD player, Video camera
• Power source for Notebook PC, Word processing system
• Gadget being needed two power supplies, e.g. CPU and LCD
2
BLOCK DIAGRAM
+
–
+
–
CSW
V
SEN
VOUT1
LX1
DOUT
FB
EXT2
GND
Vref
Error Amp.1
Error Amp.2
1
2
3
4
8
7
6
5
VFM2
V
LX lim.
VFM1 OSC
p_shift
+
–
DC/DC CONVERTER CONTROLLER
(BOOST / INVERTING)
RV5VH1××/ RV5VH2××
+
–
+
–
CSW
V
SEN
VOUT1
EXT1
D
OUT
FB
EXT2
GND
Vref
Error Amp.1
Error Amp.2
1
2
3
4
8
7
6
5
VFM2
VFM1 OSC
p_shift
+
–
3
RV5VH1××/RV5VH2××
PIN CONFIGURATION
1
2
3
4
8
7
6
5
• 8 pin SSOP (0.65mm pitch)
PIN DESCRIPTION
• RV5VH1××
Pin No. Symbol Description
1 CSW Control switch for DC/DC2
2 VSEN Sensing Pin for Voltage Detector
3 VOUT1 Output for DC/DC1, Power supply for the device
4 LX1 Output for DC/DC1, switching (Nch Open-Drain)
5 GND Ground
6 EXT2 External Transistor drive pin for DC/DC2 (CMOS output)
7 FB Input for DC/DC2 Error Amplifier
8 D
OUT Output for Voltage detector
• RV5VH2××
Pin No. Symbol Description
1 CSW Contol switch for DC/DC2
2 VSEN Sensing Pin for Voltage Detector
3 VOUT1 Output for DC/DC1, Power supply for the device
4 EXT1 External Transistor drive pin for DC/DC1 (CMOS output)
5 GND Ground
6 EXT2 External Transistor drive pin for DC/DC2 (CMOS output)
7 FB Input for DC/DC2 Error Amplifier
8 D
OUT Output for Voltage Detector
RV5VH1××/RV5VH2××
4
ABSOLUTE MAXIMUM RATINGS
• RV5VH1××
Symbol Item Ratings Unit
VOUT1 VOUT1 Pin Voltage 12 V
VLX1 LX1 Pin Voltage 12 V
VSEN VSEN Pin Voltage 12 V
DOUT DOUT Pin Voltage 12 V
VCSW CSW Pin Voltage –0.3 to VOUT1 +0.3 V
VEXT2 EXT2 Pin Voltage –0.3 to VOUT1 +0.3 V
VFB FB Pin Voltage –0.3 to VOUT1 +0.3 V
ILX1 LX1 Output Current 400 mA
IEXT2 EXT2 Output Current ±50 mA
PD Power Dissipation 300 mW
Topt Operating Temperature –40 to +85 ˚C
Tstg Storage Temperature –55 to +125 ˚C
Tsolder Lead Temperature (Soldering) 260˚C 10sec
5
RV5VH1××/RV5VH2××
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.
• RV5VH2××
Symbol Item Ratings Unit
VOUT1 VOUT1 Pin Voltage 12 V
VSEN VSEN Pin Voltage 12 V
DOUT DOUT Pin Voltage 12 V
VCSW CSW Pin Voltage –0.3 to VOUT1 +0.3 V
VEXT1, 2 EXT1, 2 Pin Voltage –0.3 to VOUT1 +0.3 V
VFB FB Pin Voltage –0.3 to VOUT1 +0.3 V
IEXT1, 2 EXT1, 2 Output Current ±50 mA
PD Power Dissipation 300 mW
Topt Operating Temperature –40 to +85 ˚C
Tstg Storage Temperature –55 to +125 ˚C
Tsolder Lead Temperature (Soldering) 260˚C 10sec
RV5VH1××/RV5VH2××
6
ELECTRICAL CHARACTERISTICS
• RV5VH101
DC/DC Converter 1
*
) VIN=1.2V, IOUT=10mA, Topt=25˚C, unless otherwise specified. (See Typical Application)
*
1 ) This value only shows the supply current of DC/DC1, not include the supply current of Voltage Detector and external resistors.
Symbol Item Conditions MIN. TYP. MAX. Unit
VOUT1 Step-up Output Voltage 2.925 3.000 3.075 V
VINmax Maximum Input Voltage 10 V
Vstart Oscillator Start-up Voltage No Load 0.7 0.8 V
Vhold Hold-on Input Voltage IOUT=1mA, VIN : 2→0V 0.7 V
ISS1 Supply Current1 *
1
No Load, CSW=“L” 10 µA
ILX LX Switching Current VLX=0.4V 100 mA
ILXleak LX Leakage Current VLX=6.0V, VIN=3.5V 0.03 1 µA
fosc Maximum Oscillator Frequency 110 130 150 kHz
Maxdty Oscillator Duty Cycle ON (V
LX=“L”) 50 65 80 %
η Efficiency 80 %
VLXlim Voltage Limit for LX Switch for LX pin 0.4 0.8 V
∆V
OUT1
Output Voltage Temp. Co. –40˚C≤Topt≤85˚C ±100 ppm/˚C
∆Topt
VOUT1=3.0V, Topt=25˚C
7
RV5VH1××/RV5VH2××
DC/DC Converter 2
Symbol Item Conditions MIN. TYP. MAX. Unit
VSET Set Output Voltage *
1
0 V
VFB Feed Back Voltage –20 0 20 mV
VIN
Maximum Input Voltage 10 V
VOPTmin Minimum Operating Voltage IOUT=1mA 1.8 V
ISS2 Supply Current2 CSW= “H” at No Load 10 µA
Istandby Standby Current CSW=“L” 0.3 µA
IEXT2H
EXT2 “H” Output Current VEXT2=VOUT1–0.4V 2 4 mA
IEXT2L EXT2 “L” Output Current VEXT2=0.4V 4 8 mA
fosc Maximum Oscillator Frequency 110 130 150 kHz
Maxdty Oscillator Duty Cycle V
EXT2=“H” 40 50 60 %
VCSWH CSW “H” Input Voltage VOUT1=3.0V 1.6 VOUT1 V
VCSWL CSW “L” Input Voltage VOUT1=3.0V 0 0.4 V
ICSWleak CSW Input Leakage Current VOUT1=3.0V –0.5 0.5 µA
∆V
FB
Feed Back Voltage Co.Temp. –40˚C≤Topt≤85˚C ±30 µV/˚C
∆Topt
*
) VOUT1=3.0V, IOUT=1mA, Topt=25˚C, unless otherwise specified. (See Typical Application)
*
1 ) Adjustable by external resistors to -30V.
VOUT1=3.0V, Topt=25˚C
RV5VH1××/RV5VH2××
8
Symbol Item Conditions MIN. TYP. MAX. Unit
VDET Detector Threshold 2.633 2.700 2.767 V
VHYS Detector Threshold Hysteresis 0.081 0.135 0.189 V
ISS3 Supply Current3 1.2 µA
VINmax Maximum Input Voltage 10 V
VOPTmin Minimum Operating Voltage 1.8 V
IOUT Output Current
V
DS=0.5V, V
OUT1=1.5V 1.0 2.0 mA
VDS=0.5V, VOUT1=3.0V 4.0 5.0 mA
ISEN Sensing pin Input Current VSEN=3.0V 0.3 1.2 µA
V
SEN Sensing pin Input Voltage 0.7 10 V
tPLH Output Delay 100 µs
∆V
OUT1
Detector Threshold Temp.Co. –40˚C≤Topt≤85˚C ±100 ppm/˚C
∆Topt
I
DOUTleak DOUT Leakage Current 0.03 0.5 µA
VOUT1=3.0V, Topt=25˚C
Voltage Detector
*
) VOUT1=3.0V, Topt=25˚C, unless otherwise specified. (See Typical Application)
9
RV5VH1××/RV5VH2××
• RV5VH102
DC/DC Converter 1
*
) VIN=1.2V, IOUT=10mA, Topt=25˚C, unless otherwise specified. (See Typical Application)
*
1 ) This value only shows the supply current of DC/DC1, not include the supply current of Voltage Detector and external resistors.
VOUT1=5.0V, Topt=25˚C
Symbol Item Conditions MIN. TYP. MAX. Unit
VOUT1 Step-up Output Voltage 4.875 5.000 5.125 V
VINmax Maximum Input Voltage 10 V
Vstart Oscillator Start-up Voltage No Load 0.7 0.8 V
Vhold Hold-on Input Voltage IOUT
=1mA, VIN : 2→0V 1.2 V
ISS1 Supply Current1 *
1
No Load, CSW=“L” 15 µA
ILX LX Switching Current VLX=0.4V 100 mA
ILXleak LX Leakage Current VLX=6.0V, VIN=5.5V 0.03 1 µA
fosc Maximum Oscillator Frequency 110 130 150 kHz
Maxdty Oscillator Duty Cycle ON (VLX=“L”) 55 70 85 %
η Efficiency 80 %
VLXlim Voltage Limit for L
X Switch 0.4 0.8 V
DV
OUT1
Output Voltage Temp. Co. –40˚C≤Topt≤85˚C ±100 ppm/˚C
DTopt
RV5VH1××/RV5VH2××
10
DC/DC Converter 2
VOUT1=5.0V, Topt=25˚C
Symbol Item Conditions MIN. TYP. MAX. Unit
VSET Set Output Voltage *
1
–3.000 0 V
VFB Feed Back Voltage 0 mV
VIN Maximum Input Voltage 10 V
VOPTmin Minimum Operating Voltage IOUT=1mA 1.8 V
ISS2 Supply Current2 CSW= “H” at No Load 25 µA
Istandby Standby Current CSW=“L” 0.3 µA
IEXT2H EXT2 “H” Output Current VEXT2=VOUT1–0.4V 3 6 mA
IEXT2L EXT2 “L” Output Current VEXT2=0.4V 7 14 mA
fosc Maximum Oscillator Frequency 110 130 150 kHz
Maxdty Oscillator Duty Cycle VEXT2=“H” 40 50 60 %
VCSWH CSW “H” Input Voltage VOUT1=5.0V 1.6 VOUT1 V
VCSWL CSW “L” Input Voltage VOUT1=5.0V 0 0.4 V
ICSWleak CSW Input Leakage Current VOUT1=5.0V –0.5 0.5 µA
∆V
FB
Feed Back Voltage Co.Temp. –40˚C≤Topt≤85˚C ±30 µV/˚C
∆Topt
*
) VOUT1=3.0V, IOUT=1mA, Topt=25˚C, unless otherwise specified. (See Typical Application)
*
1 ) Adjustable by external resistors to -30V.
11
RV5VH1××/RV5VH2××
Voltage Detector
VOUT1=5.0V, Topt=25˚C
Symbol Item Conditions MIN. TYP. MAX. Unit
VDET Detector Threshold 4.388 4.500 4.612 V
VHYS Detector Threshold Hysteresis 0.135 0.225 0.315 V
ISS3 Supply Current3*
1
1.8 µA
VINmax Maximum Input Voltage 10 V
VOPTmin Minimum Operating Voltage*
2
1.8 V
IOUT
Output Current
V
DS=0.5V, VOUT1=1.5V 1.0 2.0 mA
VDS=0.5V, VOUT1=5.0V 7.0 10.0 mA
ISEN Sensing Pin Input Current VSEN=5.0V 0.7 2.0 µA
tPLH Output Delay 100 µs
∆V
OUT1
Detector Threshold Temp.Co. –40˚C≤Topt≤85˚C ±100 ppm/˚C
∆Topt
I
DOUTleak DOUT Leakage Current 0.03 0.5 µA
*
) VOUT1=3.0V, Topt=25˚C, unless otherwise specified. (See Typical Application)
RV5VH1××/RV5VH2××
12
Symbol Item Conditions MIN. TYP. MAX. Unit
VOUT1 Step-up Output Voltage IOUT=0mA 2.925 3.000 3.075 V
VINmax Maximum Input Voltage 10 V
Vstart Oscillator Start-up Voltage No Load 0.7 0.8 V
Vhold Hold-on Input Voltage IOUT=1mA 0.7 V
ISS1 Supply Current1 *
1
IOUT=0mA, CSW=“L” 80 µA
IEXT1H EXT1 “H” Output Current VEXT2=VOUT1–0.4V 1.5 3 mA
IEXT1L EXT1 “L” Output Current VEXT2=0.4V 4 8 mA
fosc Maximum Oscillator Frequency 110 130 150 kHz
Maxdty Oscillator Duty Cycle ON (VLX=“L”) 50 65 80 %
∆V
OUT1
Output Voltage Temp. Co. –40˚C≤Topt≤85˚C ±100 ppm/˚C
∆Topt
• RV5VH201
DC/DC Converter 1
VOUT1=3.0V, Topt=25˚C
*
) VIN=1.2V, IOUT=10mA, unless otherwise specified. (See Typical Application)
*
1 ) This value shows only the supply current of DC/DC1, not include the supply current of Voltage Detector and external resistors.
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