M5291P/FP
DC/DC Converter
REJ03D0841-0201
Rev.2.01
Nov 14, 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
REJ03D0841-0201 Rev.2.01 Nov 14, 2007
Page 1 of 8
6 VCC
+
−
5
Comparator
input
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
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
Oscillator
Symbol
Comparator
VTHREG
0.03
0.2
mV/V
IB
40
200
nA
Circuit current
ICC
1.4
2.5
mA
IC
ID
Oscillator voltage
Charge, discharge
current ratio
Output
Charge current
Discharge current
REJ03D0841-0201 Rev.2.01 Nov 14, 2007
Page 3 of 8
Min
Test Conditions
3.0 ≤ VCC ≤ 40 V
VIN = 0 V
