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5.0V FIXED OUTPUT VOLTAGE DC-DC CONVERTER
GENERAL DESCRIPTION
The M62290L/FP is a general purpose DC-DC converter which
provides 5.0V fixed output.
It is possible to simplify peripheral circuits and to design compact and
low cost sets because this IC includes a lot of functions in small 5- or
8-pin packages.
Especially this is most suitable for a local voltage regulator of audio
sets as a converter from 12V to 5V.
FEATURES
• Wide operation voltage range ·········· 6 to 15 V (typ.Vcc=12V)
•Low power dissipation ··········1.1mA (max.,Vcc=12V)
•Built-in oscillator without peripheral devices (120KHz typ.)
•Built-in over current protection circuit
•Small 5-pin SIP and 8-pin SOP packages
MITSUBISHI <Dig./Ana. INTERFACE>
M62290L/FP
PIN CONFIGURATION (TOP VIEW)
IN
5
VCC
4
CLM
3
GND
2
M62290L
COLLECTOR
1
Outline 5P5T
M62290FP
COLLECTOR
GND
CLM
VCC
1
2
3
4
8
NC
7
NC
6
NC
5
IN
APPLICATIONS
Local voltage regulator of audio sets and general electric products
BLOCK DIAGRAM
OVER CURRENT
VCC
OP Amp
DETECTION RESISTOR
IN
5
1.25V
OSC
.
(120KHz)
CLM
34
CURRENT LIMIT
CIRCUIT
PWM
Comp
Outline 8P2S-A
NC : NO CONNECTION
1
Collector
1
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2
GND
OUT
April 1997
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MITSUBISHI <Dig./Ana. INTERFACE>
M62290L/FP
5.0V FIXED OUTPUT VOLTAGE DC-DC CONVERTER
ABSOLUTE MAXIMUM RATINGS (Ta=25°C, unless otherwise noted)
Symbol Parameter Conditions Ratings Unit
Vcc
Io
Pd Power dissipation
K
Topr
Tstg
Supply voltage
Output current
Thermal derating
Operating temperature
Storage temperature
Ta = 25°C
Ta > 25°C
5-pin SIP
8-pin SOP
5-pin SIP
8-pin SOP
16 V
100 mA
450 mW
4.5
4.4
-20 to +85
-40 to +125
mW440
mW/ °C
mW/ °C
°C
°C
ELECTRICAL CHARACTERISTICS (Ta=25°C, Vcc=12V, unless otherwise noted)
Block Symbol Parameter Test conditions Unit
All
block
Error
Amp.
Oscillator
CLM
Output
Vcc Supply voltage
Icc Supply current
Vo
Vreg-L
Iin
fosc
VTHCLM
ICL
Vsat
Output voltage
REF line regulation
IN input current
Oscillator frequency 120 kHz
Maximum on dutyTDUTY 90 %
Current limit voltage 140 mV
Output leakage current
Output saturation voltage
Vcc= 6 to 15V
Vcc - CLM
Vcc = 15V, Vc = 15V
Io = 100mA
Min. Typ. Max.
6.0 15 V
—
70 170
110 170
-1 1
—
Limits
780
5.004.75 5.25
160
1100Without load
5 30
300
—
0.1 0.3
µA—
V
mV
µA
µA
V
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2
April 1997
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TYPICAL CHARACTERISTICS
MITSUBISHI <Dig./Ana. INTERFACE>
M62290L/FP
5.0V FIXED OUTPUT VOLTAGE DC-DC CONVERTER
OUTPUT VOLTAGE vs.
SUPPLY VOLTAGE
5.2
5.1
5.0
4.9
OUTPUT VOLTAGE Vo(V)
4.8
6 8 10 12 14 16
SUPPLY VOLTAGE Vcc(V)
INPUT CURRENT vs.
SUPPLY VOLTAGE
220
200
CIRCUIT CURRENT vs.
SUPPLY VOLTAGE
800
750
700
650
CIRCUIT CURRENT Icc(µA)
600
4 6 8 10 12 14 16
SUPPLY VOLTAGE Vcc(V)
OSCILLATOR FREQUENCY vs.
SUPPLY VOLTAGE
130
120
180
160
140
INPUT CURRENT Iin(µA)
120
6 8 10 12 14 16
SUPPLY VOLTAGE Vcc(V)
MAX. ON DUTY vs.
SUPPLY VOLTAGE
100
95
90
85
MAX. ON DUTY TDUTY(%)
110
100
90
OSCILLATOR FREQUENCY fosc(kHz)
6 8
SUPPLY VOLTAGE Vcc(V)
CURRENT LIMIT VOLTAGE vs.
160
150
140
130
10 12 14 16
SUPPLY VOLTAGE
80
6 8 10 12 14 16
SUPPLY VOLTAGE Vcc(V)
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CURRENT LIMIT VOLTAGE VTHCLM(mV)
120
6 8 10 12 14 16
SUPPLY VOLTAGE Vcc(V)
April 1997
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MITSUBISHI <Dig./Ana. INTERFACE>
M62290L/FP
5.0V FIXED OUTPUT VOLTAGE DC-DC CONVERTER
CLM TERM. INPUT CURRENT vs.
12
11
10
9
8
7
CLM TERM. INPUT CURRENT ICLM(µA)
800
750
700
650
600
550
SUPPLY CURRENT Icc(µA)
500
SUPPLY VOLTAGE
6 8 10 12 14 16
SUPPLY VOLTAGE Vcc(V)
SUPPLY CURRENT vs.
TEMPERATURE
Vcc=16V
Vcc=12V
Vcc=6V
-40-20 0 20 40 60 80100120140
TEMPERATURE Ta(°C)
OUTPUT VOLTAGE vs.
TEMPERATURE
5.2
5.1
5.0
Vcc=16V
4.9
OUTPUT VOLTAGE Vo(V)
4.8
-40-20 0 20 40 60 80100120140
TEMPERATURE Ta(°C)
INPUT CURRENT vs.
TEMPERATURE
250
200
150
INPUT CURRENT Iin(µA)
100
-40-20 0 20 40 60 80100120140
Vcc=6V
Vcc=12V
Vcc=16V
TEMPERATURE Ta(°C)
Vcc=6VVcc=6V
Vcc=12V
OSCILLATOR FREQUENCY vs.
160
140
120
100
80
60
OSCILLATOR FREQUENCY fosc(kHz)
TEMPERATURE
Vcc=16V
Vcc=12V
Vcc=6V
-40-20 0 20 40 60 80 100120140
TEMPERATURE Ta(°C)
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MAX. ON DUTY TDUTY(%)
MAX. ON DUTY vs.
TEMPERATURE
100
Vcc=16V
95
90
85
80
Vcc=12V
Vcc=6V
-40-20 0 20 40 60 80100120140
TEMPERATURE Ta(°C)
April 1997
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MITSUBISHI <Dig./Ana. INTERFACE>
M62290L/FP
5.0V FIXED OUTPUT VOLTAGE DC-DC CONVERTER
CURRENT LIMIT VOLTAGE vs.
200
150
Vcc=12V
100
CURRENT LIMIT
VOLTAGE VTHCLM(mV)
150
Vcc=16V
50
-40 -20 0 20 40 60 80100120140
OUTPUT SATURATION VOLTAGE vs.
200
TEMPERATURE
Vcc=6V
TEMPERATURE (°C)
TEMPERATURE
CLM INPUT CURRENT vs.
20
15
10
5
CLM INPUT CURRENT ICLM(µA)
0
-40-20 0 20 40 60 80100120140
TEMPERATURE
Vcc=6V
Vcc=12V
Vcc=16V
TEMPERATURE Ta(°C)
100
VOLTAGE Vsat(mV)
50
OUTPUT SATURATION
0
Test condition: Ic=100mA
-40 -20 0 20 40 60 80100120140
TEMPERATURE Ta(°C)
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April 1997
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5.0V FIXED OUTPUT VOLTAGE DC-DC CONVERTER
Application Circuit (5V Output DC-DC converter)
RCLM
VIN (12V)
+
100µ F
0.09Ω
34
Vcc CLM
VOUT(5.0V,1A)
Collector
GND
1
100µ F
IN
5
+
M62290
MITSUBISHI <Dig./Ana. INTERFACE>
M62290L/FP
1KΩ
1KΩ
Fig.1 Example of application circuit of the M62290L/FP
•Current Limit Detection:
When the voltage drop between pin 3 and 4 becomes more than 140mV,
the Current Limit Detection circuit begins operating. The peak switch
current "Ipk" is limited to 140mV / RCLM. In the example of application
(fig.1), the current is limited to 1.5A.
The Expression of Circuit Constants
CONSTANTS
TON
TOFF
(TON+TOFF)MAX
TOFF(MIN)
TON(MAX)
L(MIN)
Ipk
RCLM
1
fosc
( TON + TOFF ) /
( VIN - VCE(sat) - VO ) X TON(MAX)
0.14
Ipk
2
EXPRESSIONS
VO+VF
VIN - VCE(sat) - VO
fosc:120KHz(Vcc=12V)
TON
1 +( )
TOFF
1
- TOFF
fosc
∆Io
1
Io +
∆VCLM:140mV(Vcc=12V)
∆Io
2
150µ H
• VF : Forward voltage drop of an external diode.
• Vsat : Output saturation voltage of an external switching transistor.
• ∆IO : Set between 1/3 and 1/5 of the maximum output current.
• An external transistor, diode and inductor must be have a peak current capability of
approximately greater than "Ipk".
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Application circuit characteristics
MITSUBISHI <Dig./Ana. INTERFACE>
M62290L/FP
5.0V FIXED OUTPUT VOLTAGE DC-DC CONVERTER
OUTPUT VOLTAGE vs.
6
SUPPLY VOLTAGE
5
4
3
2
1
OUTPUT VOLTAGE Vout (V)
IL=0mA
IL=50mA
IL=100mA
IL=500mA
0
0 2 4 6 8 10 12 14 16
SUPPLY VOLTAGE Vcc (V)
OUTPUT VOLTAGE vs.
LOAD CURRENT
5.2
5.1
Vcc=15V
Vcc=12V
Vcc=8V
5.0
4.9
OUTPUT VOLTAGE Vout (V)
4.8
Vcc=6V
0 200 400 600 800 1000 1200
LOAD CURRENT Iload (mA)
EFFICIENCY vs. LOAD CURRENT
100
90
80
70
60
EFFICIENCY ETA(%)
Vcc=6V
Vcc=8V
Vcc=12V
Vcc=15V
50
0 200 400 600 800 1000 1200
LOAD CURRENT (mA)
LOAD REGULATION vs.
0.10
SUPPLY VOLTAGE
0.08
1mA≤IL≤100mA
0.06
1mA≤IL≤200mA
1mA≤IL≤500mA
1mA≤IL≤1000mA
0.04
0.02
LOAD REGULATION Reg_L (V)
0
6 8 10 12 14 16
SUPPLY VOLTAGE Vcc (V)
LINE REGULATION vs.
LOAD CURRENT
80
60
40
Test condition:
20
LINE REGULATION Reg-in (dB)
0
6V≤Vcc≤15V
0 200 400 600 800 1000 1200
LOAD CURRENT Iload(mA)
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April 1997
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