To our custo mers,
Old Company Name in Catalogs and Other Documents
On April 1st, 2010, NEC Electronics Corporation merged with Renesas Technology
Corporation, and Renesas Electronics Corpor ation took over all the business of both
companies. Therefore, althoug h the old com pany name remains in this docum ent, it is a valid
Renesas Electronics document. W e appreciate your understanding.
Renesas Electronics website: http://www.renesas.com
April 1st, 2010
Renesas Electronics Corporation
Issued by: Renesas Electronics Corporation (http://www.renesas.com)
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Rev.2.00 Jun 14, 2006 page 1 of 6
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 Re set circui t with time delay that monito rs 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 de lay monitors
• Suppl y vol tage (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
Cout1
IN1 (3.3 V) IN2 (2.0 V)
PWM comp.
PWM comp.
Comparator
(3.3 V detect)
V
CC
Cd
GND
RESET
OP Amp OP Amp
Oscillator
(110 kHz)
Vref
1.25 V
Comparator
(V
CC
detect)
IN1; 3.3 V
25 µA
V
CC
0.6 µA
Cout2
7
3
64
+
+
−
+
−
+
−
+
−
+
−
85 2
1
+
−
M62294FP
Rev.2.00 Jun 14, 2006 page 2 of 6
Pin Arrangement
Cout1
GND
Cout2
VCC
IN1
RESET
Cd
IN2
(Top view)
Outline: PRSP0008DA-A (8P2S-A)
M62294FP
1
2
3
45
6
7
8
M62294FP
Rev.2.00 Jun 14, 2006 page 3 of 6
Absolute Maximum Ratings
(Ta = 25°C, unless otherwise noted)
Item Symbol Ratings Unit Conditions
Supply voltage VCC 16 V
Output current (DC/DC converter block) IO 30 mA ch1, ch2
Output current (Reset block) IORESET 6 mA
Power dissipation Pd 440 mW Ta = 25°C
Thermal derating Kθ 4.4 mW/°C Ta > 25°C
Operating temperature Topr −20 to +85 °C
Storage temperature Tstg −40 to +125 °C
Electrical Characteristics
(Ta = 25°C, VCC = 5 V, unle s s otherwise noted)
Limits
Block
Item
Symbol Min Typ Max
Unit
Test Condition
Supply voltage VCC 4.0 5.0 15 V All Blocks Supply current ICC 1.5 2.8 mA Without load
DC/DC converter block VO1 3.15 3.30 3.45 ch1 output Output voltage VO2 1.90 2.00 2.10 V ch2 output
Line regulation Vreg-L 5 15 mV VCC = 4 to 12 V
Input current 1 Iin 150 450 µA ch1
Error
Amp.
Input current 2 Iin 100 300 µA ch2
Oscillator Oscillator frequency fOSC 65 110 160 kHz
Maximum on duty TDUTY 90 %
Output leakage current ICL −1 1 V VCC = 12 V, VC = 12 V
Output
Output saturation voltage Vsat 1.2 2.0 V IO = 10 mA, Darlington
connection
Reset circuit block
Detecting voltage 1 Vs1 3.6 3.8 4.0 V VCC = 5 V detection
Hysteresis voltage 1 ∆Vs1 30 50 80 mV
Detecting voltage 2 Vs2 2.46 2.58 2.70 V ch1 output (3.3 V) detection
Hysteresis voltage 2 ∆Vs2 30 50 80 mV
Cd outpu t current IPD −1.1 −0.6 −0.3 µA
Delay time tpd 5 10 20 ms Cd = 4700 pF
RESET output current IOC −40 −25 −17 µA VCC = 5 V, VO = 1/2 × VCC
RESET low voltage VOL 0.2 VO1 V IORESET = 4 mA
Reset
circuit
RESET high voltage VOH 0.8 VO1 V
M62294FP
Rev.2.00 Jun 14, 2006 page 4 of 6
Reset Block Timing Chart
5 V
3.85 V
3.80 V
0 V
3.3 V
2.63 V
2.58 V
0 V
V
O
1
0 V
RESET output ch1 output (V
O
1) V
CC
t
t
t
tpdtpdtpd
note: tpd: RESET delay time···················tpd (ms) ≈ 2.13 × 10−3 × Cd (pF)
M62294FP
Rev.2.00 Jun 14, 2006 page 5 of 6
Application Circuit (3.3 V and 2.0 V 2-output Voltage DC/DC Converter)
MCU etc.
+
+
+Cin
V
IN
(5 V)
V
OUT1
(3.3 V)
V
OUT2
(2.0 V)
C
o2
C
o1
V
CC
IN1
IN2
RESET Cd GND
Cout2
Cout1
M62294FP
R1
L1
D1
Q1
R3
L2 D2
Q2
R4
R2
2.0 V Line
3.3 V Line
8
5
76 2
3
1
4
The Expression of Circuit Constants
(T
ON
+ T
OFF
) /
( )
T
ON
T
OFF
1 +
(V
IN
− V
CE (sat)
− V
O
)
× T
ON (MAX)
∆l
O
V
O
+ V
F
V
IN
− V
CE (sat)
− V
O
− T
OFF
1
f
OSC
(T
ON
+ T
OFF
)
MAX
T
OFF (MIN)
T
ON (MAX)
lpk
L
(MIN)
T
ON
T
OFF
l
O
+ ∆l
O
1
2
Constants Expressions
1
f
OSC
f
OSC
: 110 kHz (V
CC
= 5 V)
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".
M62294FP
Rev.2.00 Jun 14, 2006 page 6 of 6
Package Dimensions
2.
1. DIMENSIONS "*1" AND "*2"
DO NOT INCLUDE MOLD FLASH.
NOTE)
DIMENSION "*3" DOES NOT
INCLUDE TRIM OFFSET.
b
p
A
1
H
E
y0.1
e1.27
c
0° 10°
L0.2 0.4 0.6
0.05
A1.9
5.9 6.2 6.5
A
2
1.5
E4.2 4.4 4.6
D4.8 5.0 5.2
Reference
Symbol
Dimension in Millimeters
Min Nom Max
0.35 0.4 0.5
0.13 0.15 0.2
P-SOP8-4.4x5-1.27 0.07g
MASS[Typ.]
8P2S-APRSP0008DA-A
RENESAS CodeJEITA Package Code Previous Code
1.12 1.42
Detail F
L
A
1
A
2
F
*1
*2
*3
85
41 Index mark
y
b
p
e
A
c
E
H
E
D
Keep safety first in your circuit designs!
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may occur with them. Trouble with semiconductors may lead to personal injury, fire or property damage.
Remember to give due consideration to safety when making your circuit designs, with appropriate measures such as (i) placement of substitutive, auxiliary
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