M62294FP [MITSUBISHI]
3.3V, 2.0V FIXED 2-OUTPUT VOLTAGE DC-DC CONVERTER; 3.3V ， 2.0V固定2 ，输出电压DC -DC转换器
| 型号： | M62294FP |
| 厂家： | 
Mitsubishi Group |
| 描述： | 3.3V, 2.0V FIXED 2-OUTPUT VOLTAGE DC-DC CONVERTER |
| 文件： | 总4页 (文件大小：53K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
MITSUBISHI(Standard Linear ICs)
M62294FP
3.3V, 2.0V FIXED 2-OUTPUT VOLTAGE DC-DC CONVERTER
DESCRIPTION
M62293FP is 3.3V and 2.5V f ixed stable 2-output step-down DC-DC
conv erter.
PIN CONFIGURATION(TOP VIEW)
It is possible to simplif y peripheral circuit and to design compact and low
cost sets because this dev ice includes peripheral dev ices in small size
8pin package.
The IC also has Reset circuit with time delay that monitors power
supply (Vcc=5V) and one regulator output(Vout1=3.3V;IN1 terminal),
theref ore an application system is protected system errors.
Especially this is most suitable f or application sysytem with
microprocessor and ASIC.
1
2
3
4
Cout1
GND
Cout2
Vcc
8
7
IN1
RESET
Cd
6
5
IN2
FEATURES
•3.3V and 2.0V step-down conv erter
Outline 8P2S-A
•4 to 15V wide input supply v oltage (Vcc=5V ty p.)
•Reset circuit with time delay monitors
supply v oltage(Vcc=5V)and regulator output (3.3V)
•110kHz f ixed f requency oscillator without peripheral dev ices
•8pin SOP package
APPLICATION
application system with microprocessor and ASIC
BLOCK DIAGRAM
Vcc
Cd
IN1;3.3V
25µA
RESET
Vref
1.25V
0.6µA
comparator
(3.3V detect)
comparator
(Vcc detect)
Vcc
oscillator
(110kHz)
Cout2
Cout1
PWM comp.
PWM comp.
op amp
op amp
GND
IN2(2.0V)
IN1(3.3V)
4
( 1 / )
000131
MITSUBISHI(Standard Linear ICs)
M62294FP
3.3V, 2.0V FIXED 2-OUTPUT VOLTAGE DC-DC CONVERTER
ABSOLUTE MAXIMUM RATINGS(Ta=25C,unless otherwise noted)
Symbol
Vcc
Parameter
Conditions
Ratings
16
Unit
V
Supply v oltage
Output current(DC-DC conv erter block)
ch1,ch2
mA
mA
mW
mW/ºC
ºC
Io
30
6
IoRESET Output current(Reset block)
440
Pd
Kq
Power dissipation
Ta=25ºC
Ta>25ºC
Thermal derating
4.4
Topr
Tstg
Operating temperature
Storage temperature
-20~+85
-40~+125
ºC
ELECTRICAL CHARACTERISTICS(Ta=25C,Vcc=5V,unless otherwise noted)
Limits
Block
Symbol
Parameter
Test condition
Unit
Min.
4.0
Ty p. Max.
5.0
1.5
15
V
All
Blocks
Vcc
Icc
Supply v oltage
Supply current
Without load
2.8
mA
¾
DC-DC Conv erter Block
Vo1
ch1 output
ch2 output
Vcc=4~12V
3.15
1.90
3.30 3.45
2.00 2.10
Output v oltage
V
Vo2
Error Amp.
Vreg-L Line regulation
5
15
mV
µA
µA
KHz
%
¾
¾
Iin
Iin
Input current 1
150
100
110
90
450
300
160
ch1
ch2
Input current 2
¾
fosc
65
Oscillator
Output
Oscillator frequency
TDUTY Maximum ON duty
¾
-1
¾
¾
1
ICL
Output leakage current
Vcc=12V, Vc=12V
V
¾
Output saturation v oltage Io=10mA,Darlington connection
1.2
2.0
V
Vsat
Reset circuit Block
Vs1
Detecting v oltage 1
hysterisys voltage 1
Detecting v oltage 2
Hysterisy s v oltage 2
Cd output current
Vcc=5V detection
V
mV
V
3.6
30
3.8
50
4.0
80
DVs1
Vs2
ch1output(3.3V)detection
2.46
30
2.58 2.70
50 80
-0.6 -0.3
DVs2
mV
µA
msec
µA
V
Reset
Circuit
IPD
-1.1
5
tpd
IOC
VOL
VOH
Delay time
Cd=4700pF
10
20
RESET output current
RESET LOW v oltage
RESET High v oltage
Vcc=5V, Vo=1/2 X Vcc
-40
-25
-17
IoRESET=4mA
¾
0.2Vo1
¾
V
0.8Vo1
( 2 / )
4
000131
MITSUBISHI(Standard Linear ICs)
M62294FP
3.3V, 2.0V FIXED 2-OUTPUT VOLTAGE DC-DC CONVERTER
RESET BLOCK timing chart
5V
3.85V
3.80V
0V
t
t
t
3.3V
2.63V
2.58V
0V
Vo1
td
td
td
0V
td : RESET Delay Time ···
.
-3
td(msec) = 2.13 X 10 X Cd(pF)
.
( 3 / 4)
000131
MITSUBISHI(Standard Linear ICs)
M62294FP
3.3V, 2.0V FIXED 2-OUTPUT VOLTAGE DC-DC CONVERTER
APPLICATION CIRCUIT (3.3V and 2.0V 2-output voltage DC-DC converter
VIN(5V)
+
Cin
R2
R1
Vcc
VOUT1(3.3V)
Co1
Q1
D1
IN1
IN2
Cout1
Cout2
+
+
L1
M62294FP
R4
Q2
VOUT2(2.0V)
Co2
R3
D2
RESET Cd
GND
L2
3.3V LINE
2.0V LINE
MCU etc.
THE EXPRESSION OF CIRCUIT CONSTANTS
Constants
Expressions
VO+VF
TON
VIN - VCE(sat) - VO
TOFF
1
fosc
(T ON+TOFF)MAX
TOFF(MIN)
TON(MAX)
L(MIN)
fosc:110KHz(Vcc=5V)
TON
)
1 +
( TON + TOFF ) /
(
TOFF
1
fosc
- TOFF
( VIN - VCE(sat) - VO ) X TON(MAX)
DIo
1
2
DIo
Io +
Ipk
note:
·VF
: Forward voltage drop of an external diode
·Vsat : Output saturation voltage of an external switching transistor.
·DIO : Set to 1/3 to 1/5 of maximum output current.
·Choose an external transistor, diode and inductor with peak current rating
approximately greater than "Ipk".
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