ETC RCR2562

®
RCR2562
PFM Step-up DC/DC Converter
z
battery-powered instruments.
Features
• Low Start-up Voltage, 1.1V at 1mA
Consists of an oscillator, a PFM control circuit, a driver Pin
• Minimal Number of External Components ( Only an Inductor,
EXT to external MOSFET, a reference voltage unit, an error
a Diode, a MOSFET and two Capacitors )
amplifier. A low ripple and high efficiency step-up DC/DC
•Adjustable version ( VREF = 1.25V VREF = 2.7V or VREF = 3.3V )
converter can be constructed of this RCR2562 IC with only six
• Ultra Low Input Current ( 12μA at Switch Off )
external components.
• ±2% High Output Voltage Accuracy
The RCR2562 works on ultra low start-up voltage, typically
• Low Ripple and Low Noise
max start-up voltage less than 1.1V at 1mA load current
• 75% Efficiency with Low Cost Inductor
• SOT23-5L Small Packages
z
Applications
• Battery-powered equipment
z
• Cameras, Camcorders, VCRs, PDAs, pagers, electronic
General Description
The RCR2562 Series are PFM Step-up DC/DC ICs with ultra
data banks, and hand-held communication equipment
low supply current by CMOS process and suitable for use with
z
Package Information
③
④
②
①
⑤
Units:mm
1 /7
ISPD-V3.1
®
RCR2562
z
Pin Configurations
Pin Port
SOT23-5L
①
FB
②
VIN
③
NC
④
GND
⑤
EXT
z
Functional Block Diagram
z
Ordering Information
RCR2562 - □□□ □□
Package Type
SK: SOT23-5L
Reference Voltage
125= 1.25V; 270= 2.70V; 330= 3.30V
Indicate The Product Number
z
Absolute Maximum Ratings
Parameter
Symbol
Ratings
Unit
Output Voltage
VOUT
-0.3 to 10
V
EXT Pin Voltage
VEXT
-0.3 to 10
V
EXT Pin Current ( 2 )
IEXT
±30
mA
250
mW
Power Dissipation ( TA = 25℃ )
PD
Operating Temperature Range
TOPR
-40 to +125
℃
Storage Temperature Range
TSTG
-65 to +150
℃
2 /7
ISPD-V3.1
®
RCR2562
z
Electrical Characteristics
TA = 25℃, unless otherwise specified
Parameter
Symbol
Output Voltage Accuracy
Input Voltage
VFB Voltage
Start-up Voltage
Input Current2
Max
Unit
ΔVOUT
-2
--
+2
%
VIN
--
--
10
V
RCR2562 - 125SK
1.22
1.25
1.28
V
RCR2562 - 270SK
2.65
2.70
2.75
V
RCR2562 - 330SK
3.24
3.3
3.36
V
--
1.0
1.1
V
--
75
--
--
85
--
--
30
40
--
50
60
--
6
12
VOUT ≤3.5V
-1.5
--
--
-2
--
--
1.5
--
--
2
--
--
80
120
160
kHz
70
78
85
%
ISS
To be measured at VIN at
no load
ISWITCHING
To be measured at VOUT
in switch off condition
VOUT > 3.5V
VOUT ≤ 3.5V
VOUT > 3. 5V
EXT“H”Output
Current
VOUT ≤3.5V
EXT“L”Output
Current
VOUT ≤ 3.5V
IOUT = 1mA, VIN : 0 to 2V
EFFI
VOUT > 3.5V
Input Current1
Typ
VST
VOUT ≤ 3.5V
Efficiency
Min
VFB
Test Conditions
VOUT > 3. 5V
VOUT > 3. 5V
ISH
ISL
Maximum Oscillator
FMAX
Oscillator Duty Cycle
DOSC
VEXT = VOUT - 0.4V
VEXT = 0.4V
On (VLX ”L” ) side
%
μA
μA
mA
mA
Note1 Vout(T)= Specified output Voltage.
Note2 Unless otherwise provided, VSS = GND, IOUT = 10mA,
Note3 MOSFET: RCR1516
z
Typical Application Circuit ( VOUT = 5V )
Components :
Inductor : 47uH,
Diode : 1N5818,
Input Capacitor : 1uF/10V ( Tantalum )
NMOS : RCR1516
Output Capacitor : 47uF/16V ( Tantalum )
3 /7
ISPD-V3.1
®
RCR2562
z
Typical Performance Characteristics
1、 RCR2562 ( When VOUT = 5V ) :
START-UP Voltage (v)
2.0
RCR1513SI
1.8
xx151
1.6
1.4
RCR1516
1.2
1.0
0.8
0
20
40
60
80
100
120
Output Current(mA)
Figure1.Start-up Voltage VS Output Current
2、 RCR2562-125、RCR2562-27 ( VOUT = 3.0V ) :
Figure2. Output Voltage VS Output Current
Figure3. Efficiency VS Output current
3、 RCR2562 ( VOUT = 3.3V ) :
4 /7
ISPD-V3.1
®
RCR2562
Figure4. Output Voltage VS Output current
Figure5. Efficiency VS Output current
4、 RCR2562 ( VOUT = 5.0V ) :
Figure6. Output Voltage VS Output current
5 /7
ISPD-V3.1
®
RCR2562
5、Efficiency VS. Output Current:
Figure7. Efficiency VS Output current
6 /7
ISPD-V3.1
®
RCR2562
DISCLAIMER
INNOVA SEMICONDUCTOR RESERVES THE RIGHT TO MAKE CHANGES WITHOUT FURTHER NOTICE
TO ANY PRODUCTS HEREIN TO IMPROVE RELIABILITY, FUNCTION OR DESIGN. INNOVA DOES NOT
ASSUME ANY LIABILITY ARISING OUT OF THE APPLICATION OR USE OF ANY PRODUCT OR
CIRCUIT DESCRIBED HEREIN; NEITHER DOES IT CONVEY ANY LICIENCE UNDER ITS PATENT
RIGHTS, NOR THE RIGHTS OF OTHERS.
7 /7
ISPD-V3.1