M62294FP [RENESAS]
3.3 V, 2.0 V Fixed 2-Output Voltage DC/DC Converter; 3.3 V ， 2.0 V固定2 ，输出电压DC / DC转换器
| 型号： | M62294FP |
| 厂家： | 
RENESAS TECHNOLOGY CORP |
| 描述： | 3.3 V, 2.0 V Fixed 2-Output Voltage DC/DC Converter |
| 文件： | 总7页 (文件大小：77K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
M62294FP
3.3 V, 2.0 V Fixed 2-Output Voltage DC/DC Converter
REJ03D0854-0200
Rev.2.00
Jun 14, 2006
Description
M62294FP is 3.3 V and 2.0 V fixed stable 2-output step-down DC/DC converter.
It is possible to simplify peripheral circuit and to design compact and low cost sets because this device includes
peripheral devices in small size 8-pin package.
The IC also has Reset circuit with time delay that monitors power supply (VCC = 5 V) and one regulator output (Vout1
= 3.3 V; IN1 terminal), therefore an application system is protected system errors.
Especially this is most suitable for application system with microprocessor and ASIC.
Features
•
•
•
•
•
•
3.3 V and 2.0 V step-down converter
4 to 15 V wide input supply voltage (VCC = 5 V typ.)
Reset circuit with time delay monitors
Supply voltage (VCC = 5 V) and regulator output (3.3 V)
110 kHz fixed frequency oscillator without peripheral devices
8-pin SOP package
Application
Application system with microprocessor and ASIC
Block Diagram
VCC
4
Cd
6
IN1; 3.3 V
25 µA
7
RESET
Vref
1.25 V
+
−
+
+
−
Comparator
(3.3 V detect)
Comparator
(VCC detect)
0.6 µA
Oscillator
(110 kHz)
VCC
Cout1 1
3 Cout2
−
+
−
+
+
+
−
PWM comp.
PWM comp.
−
OP Amp
OP Amp
8
5
2
GND
IN1 (3.3 V)
IN2 (2.0 V)
Rev.2.00 Jun 14, 2006 page 1 of 6
M62294FP
Pin Arrangement
M62294FP
Cout1
GND
Cout2
VCC
IN1
1
2
3
4
8
7
6
5
RESET
Cd
IN2
(Top view)
Outline: PRSP0008DA-A (8P2S-A)
Rev.2.00 Jun 14, 2006 page 2 of 6
M62294FP
Absolute Maximum Ratings
(Ta = 25°C, unless otherwise noted)
Item
Supply voltage
Symbol
VCC
Ratings
Unit
V
Conditions
ch1, ch2
Ta = 25°C
16
Output current (DC/DC converter block)
Output current (Reset block)
Power dissipation
IO
30
6
mA
mA
mW
IORESET
Pd
440
Thermal derating
Kθ
4.4
mW/°C Ta > 25°C
Operating temperature
Storage temperature
Topr
Tstg
−20 to +85
−40 to +125
°C
°C
Electrical Characteristics
(Ta = 25°C, VCC = 5 V, unless otherwise noted)
Limits
Typ
5.0
Block
Item
Supply voltage
Supply current
Symbol
VCC
Unit
V
Test Condition
Without load
Min
Max
15
All Blocks
4.0
ICC
1.5
2.8
mA
DC/DC converter block
Error
Amp.
Output voltage
VO1
VO2
Vreg-L
Iin
3.15
1.90
3.30
2.00
5
3.45
2.10
15
V
ch1 output
ch2 output
VCC = 4 to 12 V
ch1
Line regulation
mV
µA
µA
kHz
%
Input current 1
150
100
110
90
450
300
160
Input current 2
Iin
ch2
Oscillator
Output
Oscillator frequency
Maximum on duty
Output leakage current
fOSC
TDUTY
ICL
65
−1
1
V
VCC = 12 V, VC = 12 V
Output saturation voltage Vsat
1.2
2.0
V
IO = 10 mA, Darlington
connection
Reset circuit block
Reset
circuit
Detecting voltage 1
Vs1
∆Vs1
Vs2
∆Vs2
IPD
3.6
30
3.8
50
4.0
80
V
mV
V
VCC = 5 V detection
Hysteresis voltage 1
Detecting voltage 2
Hysteresis voltage 2
Cd output current
Delay time
2.46
30
2.58
50
2.70
80
ch1 output (3.3 V) detection
mV
µA
ms
µA
V
−1.1
5
−0.6
10
−0.3
20
tpd
Cd = 4700 pF
RESET output current
RESET low voltage
RESET high voltage
IOC
−40
−25
−17
VCC = 5 V, VO = 1/2 × VCC
IORESET = 4 mA
VOL
VOH
0.2 VO1
0.8 VO1
V
Rev.2.00 Jun 14, 2006 page 3 of 6
M62294FP
Reset Block Timing Chart
5 V
3.85 V
3.80 V
0 V
t
t
t
3.3 V
2.63 V
2.58 V
0 V
VO1
tpd
tpd
tpd
0 V
note: tpd: RESET delay time···················tpd (ms) ≈ 2.13 × 10−3 × Cd (pF)
Rev.2.00 Jun 14, 2006 page 4 of 6
M62294FP
Application Circuit (3.3 V and 2.0 V 2-output Voltage DC/DC Converter)
VIN (5 V)
+
Cin
4
R2
R1
V
OUT1 (3.3 V)
Q1
8
5
Cout1
Cout2
1
3
IN1
IN2
+
+
Co1
D1
R4
R3
M62294FP
L1
Q2
VOUT2 (2.0 V)
Co2
D2
RESET
7
Cd
6
GND
L2
2
3.3 V Line
2.0 V Line
MCU etc.
The Expression of Circuit Constants
Expressions
O + VF
VIN − VCE (sat) − VO
Constants
TON
V
TOFF
1
fOSC: 110 kHz (VCC = 5 V)
(TON + TOFF
)
MAX
fOSC
TON
TOFF (MIN)
(
)
1 +
(TON + TOFF) /
TOFF
1
− TOFF
TON (MAX)
fOSC
(VIN − VCE (sat) − VO) × TON (MAX)
∆lO
L
(MIN)
1
lpk
lO
+
∆lO
2
Note: VF: Forward voltage drop of an external diode.
Vsat: Output saturation voltage of an external switching transistor.
∆IO: 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".
Rev.2.00 Jun 14, 2006 page 5 of 6
M62294FP
Package Dimensions
JEITA Package Code
P-SOP8-4.4x5-1.27
RENESAS Code
Previous Code
8P2S-A
MASS[Typ.]
0.07g
PRSP0008DA-A
8
5
F
NOTE)
1. DIMENSIONS "*1" AND "*2"
DO NOT INCLUDE MOLD FLASH.
2. DIMENSION "*3" DOES NOT
INCLUDE TRIM OFFSET.
1
4
Index mark
A2
A1
*2
D
Dimension in Millimeters
Reference
Symbol
Min Nom Max
D
E
4.8 5.0 5.2
4.2 4.4 4.6
1.5
A2
A1
A
0.05
*3
bp
e
1.9
0.35 0.4 0.5
0.13 0.15 0.2
y
bp
c
Detail F
0°
10°
HE
e
5.9 6.2 6.5
1.12 1.27 1.42
0.1
y
L
0.2 0.4 0.6
Rev.2.00 Jun 14, 2006 page 6 of 6
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