Renesas M5291P Dc/dc converter Datasheet

M5291P/FP
DC/DC Converter
REJ03D0841-0300
Rev.3.00
Jun 15, 2007
Description
M5291 is a semiconductor integrated circuit which is designed for switching regulator control. The device consists of a
comparator, controlled pulse width oscillator (with peak current protection circuit), temperature compensated reference,
and high current output switch.
Especially, this IC was designed for Step-Down and Step-Up and Voltage-Inverting applications.
Features
• Wide supply voltage range: 2.5 to 40 V
• Low dissipation current: 1.4 mA
• Wide range of output
Voltage adjust: 1.17 to 40 V
• Output switch current: 200 mA
• Wide range of switching frequency: 100 Hz to 100 kHz
• Built-in peak current protection circuit
Application
General power supply system
Block Diagram
Switch
collector
1
8 Driver
Q
S
R
Switch
emitter
2
7
Peak current
sense
Oscillator
Timing
capacitor
3
Comparator
1.17 V
Reference
Ground
4
REJ03D0841-0300 Rev.3.00 Jun 15, 2007
Page 1 of 9
6 VCC
+
−
5
Comparator
input
M5291P/FP
Pin Arrangement
M5291P/FP
Switch collector
1
8
Driver
Switch emitter
2
7
Peak current sense
Timing capacitor
3
6
VCC
Ground
4
5
Comparator input
(Top view)
Outline: PRDP0008AA-A (8P4) [P]
PRSP0008DE-C [FP] (recommend)
PRSP0008DA-A (8P2S-A) [FP] (not recommend for new design)
REJ03D0841-0300 Rev.3.00 Jun 15, 2007
Page 2 of 9
M5291P/FP
Absolute Maximum Ratings
(Ta = 25°C, unless otherwise noted)
Item
Power supply voltage
Symbol
VCC
Ratings
40
Unit
V
Input voltage
Switch collector voltage
VIN
VC (S)
−0.3 to 40
40
V
V
Switch emitter voltage
VE (S)
40
V
Collector emitter voltage
Driver collector voltage
VCE (S)
VC (D)
40
40
V
V
Switch current
Internal power dissipation
ISW
Pd
200
625
mA
mW
Thermal derating
Kθ
440
6.25
mW/°C
Operating ambient temperature
Topr
4.5
−20 to +75
Storage temperature
Tstg
−55 to +125
Conditions
Comparator input
8-pin DIP
8-pin FLAT
8-pin DIP
8-pin FLAT
°C
°C
Electrical Characteristics
(Ta = 25°C, VCC = 5 V)
Item
Oscillator
Output
Comparator
Circuit current
Symbol
Limits
Typ
Max
Unit
20
150
35
200
50
250
µA
µA
VOSC
ID/IC


0.6
6


VP-P

Current protection,
detecting voltage
Saturation voltage
VIPK
270
330
390
mV
Vsat1

1.5
2.0
V
Darlington connection
ISW = 50 mA
Saturation voltage
Vsat2

0.3
0.6
V
ISW = 50 mA
IC (D) = 10 mA
Collector leak current
Threshold voltage
IL
VTH

1.11
10
1.17

1.23
nA
V
VCE = 40 V
Threshold voltage
regulation
Input bias current
VTHREG

0.03
0.2
mV/V
IB

40
200
nA
ICC

1.4
2.5
mA
Charge current
Discharge current
IC
ID
Oscillator voltage
Charge, discharge
current ratio
REJ03D0841-0300 Rev.3.00 Jun 15, 2007
Page 3 of 9
Min
Test Conditions
3.0 ≤ VCC ≤ 40 V
VIN = 0 V
M5291P/FP
Application Circuits
1. Step-up Circuit
L
VIN = 5 V
VOUT = 12 V
IO = 20 mA
f = 50 kHz
510 µH
1
8
Q
R3
240 Ω
S
R
2
7
Oscillator
RSC
3Ω
D
Comparator
3
CT
−
4
+
+
+
1.17 V
820 pF
VOUT
12 V/20 mA
6
VIN
5V
CIN
100 µF
5
COUT
100 µF
R1
9.1 kΩ
R2
1 kΩ
2. Step-up Circuit with Transistor
L
VIN = 5 V
VOUT = 12 V
IO = 1 A
f = 50 kHz
10 µH
1
8
Q
R3
1 kΩ
S
R
NPN
Tr
2
7
R4
Oscillator
RSC
60 mΩ
680 Ω
D
CT
820 pF
3
Comparator
6
+
1.17 V
−
4
VOUT
12 V/1 A
+
COUT
100 µF
REJ03D0841-0300 Rev.3.00 Jun 15, 2007
Page 4 of 9
+
CIN
100 µF
5
R1
9.1 kΩ
VIN
5V
R2
1 kΩ
M5291P/FP
3. Step-down Circuit
VIN = 24 V
VOUT = 5 V
IO = 0.1 A
f = 50 kHz
1
8
Q
R3
1.2 kΩ
S
R
2
7
D
Oscillator
CT
3
Comparator
330 pF
+
+
−
4
VOUT
5 V/0.1 A
6
+
1.17 V
L
440 µH
RSC
2Ω
VIN
24 V
CIN
100 µF
5
COUT
100 µF
R1
3.6 kΩ
R2
1.2 kΩ
4. Step-down Circuit with Transistor
VIN = 24 V
VOUT = 5 V
IO = 1 A
f = 50 kHz
R3
100 Ω
PNP
Tr
1
8
R4
300 Ω
Q
S
R
D
2
7
Oscillator
L
47 µH
CT
330 pF
3
Comparator
RSC
0.16 Ω
6
+
1.17 V
+
CIN
VIN
24 V
−
4
VOUT
5 V/1 A
+
COUT
100 µF
REJ03D0841-0300 Rev.3.00 Jun 15, 2007
Page 5 of 9
5
R1
3.6 kΩ
R2
1.2 kΩ
M5291P/FP
5. Inverse Polarity Circuit
VIN = 5 V
VOUT = −5 V
IO = 40 mA
f = 50 kHz
1
8
Q
S
R
L
2
7
Oscillator
260 µH
3
RSC
1.5 Ω
Comparator
CT
820 pF
−
4
+
+
+
1.17 V
D
VOUT
−5 V/40 mA
6
VIN
5V
CIN
100 µF
5
R1
1 kΩ
COUT
100 µF
R2
3.3 kΩ
6. Inverse Polarity Circuit with Transistor
VIN = 5 V
VOUT = −12 V
IO = 1 A
f = 50 kHz
R3
100 Ω
PNP
Tr
1
8
R4
24 Ω
Q
S
R
L
20 µH
2
7
Oscillator
3
CT
820 pF
Comparator
−
4
+
COUT
220 µF
REJ03D0841-0300 Rev.3.00 Jun 15, 2007
Page 6 of 9
6
+
1.17 V
D
VOUT
−12 V/1 A
RSC
0.1 Ω
+
CIN
100 µF
5
R1
2.4 kΩ
VIN
5V
R2
22 kΩ
M5291P/FP
Constant Definition
Constant
Step-down Circuit
Step-up Circuit
Inverse Polarity Circuit
VOUT + VF
VOUT + VF
VIN (MIN) − Vsat −VOUT
VOUT + VF − VIN (MIN)
VIN (MIN) − Vsat
1
1
fMIN
TON + TOFF
TON
1+
TOFF
1
− TOFF
fMIN
fMIN
TON + TOFF
TON
1+
TOFF
1
− TOFF
fMIN
VIN − Vsat
1
fMIN
TON + TOFF
TON
1+
TOFF
1
− TOFF
fMIN
CT
6 × 10−5 • TON
6 × 10−5 • TON
6 × 10−5 • TON
IPK
2 • IOUT (MAX)
TON
TOFF
(TON + TOFF) MAX
TOFF
TON
L (MIN)
RSC
VO
Note:
(
VIN (MIN) − Vsat − VOUT
) • TON (MAX)
IPK
0.33
IPK
1.17 × (1 +
2 • IOUT (MAX) • ( 1 +
(
VIN (MIN) − Vsat
IPK
TON
)
TOFF
) • TON (MAX)
0.33
IPK
R1
)
R2
1.17 × (1 +
2 • IOUT (MAX) • ( 1 +
(
VIN (MIN) − Vsat
IPK
TON
TOFF
)
) • TON (MAX)
0.33
IPK
R1
)
R2
1.17 × (1 +
R1
)
R2
VF: Forward Voltage of Diode
Vsat: Output saturation voltage of M5291 (0.6 Vmax at single output, 2.0 Vmax at Darlington output)
Setting switching frequency first and calculate each constant value.
Notes:
1. Peak current sense
In overcurrent function, oscillator is stop, when voltage descend of external detecting resistance is more than 330
mV.
2. ON/OFF Control
If you need stop the action, connected resistance (5 to 10 kΩ) between supply voltage terminal and timing capacitor
terminal.
TON
3.
is not established more than 0.857, because charge and discharge current ratio fixed 1 : 6.
TON + TOFF
REJ03D0841-0300 Rev.3.00 Jun 15, 2007
Page 7 of 9
M5291P/FP
Package Dimensions
RENESAS Code
PRDP0008AA-A
5
1
4
MASS[Typ.]
0.5g
c
*1
E
8
Previous Code
8P4
e1
JEITA Package Code
P-DIP8-6.3x8.84-2.54
NOTE)
1. DIMENSIONS "*1" AND "*2"
DO NOT INCLUDE MOLD FLASH.
2. DIMENSION "*3" DOES NOT
INCLUDE TRIM OFFSET.
*2
D
e1
D
E
A
A1
A2
bp
b2
b3
c
L
A1
A
A2
Reference
Symbol
SEATING PLANE
*3 b
3
*3 b
2
bp
e
e
L
JEITA Package Code
P-SOP8-4.4x4.85-1.27
RENESAS Code
PRSP0008DE-C
*1
Previous Code
—
Min Nom Max
7.32 7.62 7.92
8.7 8.9 9.1
6.15 6.3 6.45
4.5
0.51
3.3
0.4 0.5 0.6
0.9 1.0 1.3
1.4 1.5 1.8
0.22 0.27 0.34
15°
0°
2.29 2.54 2.79
3.0
MASS[Typ.]
0.1g
F
D
8
Dimension in Millimeters
NOTE)
1. DIMENSIONS"*1 (Nom)"AND"*2"
DO NOT INCLUDE MOLD FLASH.
2. DIMENSION"*3"DOES NOT
INCLUDE TRIM OFFSET.
5
c
*2
E
HE
bp
Index mark
Terminal cross section
( Ni/Pd/Au plating )
Z
Reference
Symbol
4
1
e
*3
bp
x
M
A
A2
L1
A1
θ
L
y
Detail F
REJ03D0841-0300 Rev.3.00 Jun 15, 2007
Page 8 of 9
D
E
A2
A1
A
bp
b1
c
c1
θ
HE
e
x
y
Z
L
L1
Dimension in Millimeters
Min Nom Max
4.65 4.85 5.05
4.2
4.4 4.6
1.85
0.00 0.1 0.20
2.03
0.34 0.4 0.46
0.15 0.20 0.25
0°
8°
5.7 6.2 6.5
1.12 1.27 1.42
0.12
0.10
0.75
0.25 0.45 0.65
0.90
M5291P/FP
JEITA Package Code
P-SOP8-4.4x5-1.27
RENESAS Code
PRSP0008DA-A
MASS[Typ.]
0.07g
E
5
*1
HE
8
Previous Code
8P2S-A
F
1
NOTE)
1. DIMENSIONS "*1" AND "*2"
DO NOT INCLUDE MOLD FLASH.
2. DIMENSION "*3" DOES NOT
INCLUDE TRIM OFFSET.
4
Index mark
c
A2
*2
A1
D
L
A
Reference
Symbol
*3
e
bp
y
D
E
A2
A1
A
bp
c
Detail F
HE
e
y
L
REJ03D0841-0300 Rev.3.00 Jun 15, 2007
Page 9 of 9
Dimension in Millimeters
Min Nom Max
4.8 5.0 5.2
4.2 4.4 4.6
1.5
0.05
1.9
0.35 0.4 0.5
0.13 0.15 0.2
0°
10°
5.9 6.2 6.5
1.12 1.27 1.42
0.1
0.2 0.4 0.6
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