R5220D141A-TR-FE [RICOH]
Switching Regulator, 0.2A, 1440kHz Switching Freq-Max, CMOS, PDSO6, HALOGEN FREE AND ROHS COMPLIANT, SON-6;
| 型号： | R5220D141A-TR-FE |
| 厂家： | 
RICOH ELECTRONICS DEVICES DIVISION |
| 描述： | Switching Regulator, 0.2A, 1440kHz Switching Freq-Max, CMOS, PDSO6, HALOGEN FREE AND ROHS COMPLIANT, SON-6 开关 光电二极管 |
| 文件： | 总21页 (文件大小：408K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
R5220x SERIES
PWM Step-down DC/DC Converter with switch function
NO.EA-121-120113
OUTLINE
The R5220x Series are CMOS-based PWM step-down DC/DC Converters with synchronous rectifier, low
supply current and LDO mode.
DC/DC converter of the R5220x consists of an oscillator, a PWM control circuit, a reference voltage unit, an
error amplifier, a soft-start circuit, protection circuits, a protection against miss operation under low voltage
(UVLO), PWM-DC to DC converter / LDO alternative circuit, a chip enable circuit, and a driver transistor. A high
efficiency step-down DC/DC converter can be easily composed of this IC with only a few kinds of external
components, or an inductor and capacitors.
LDO of the R5220x consists of a vortage reference unit, an error amplifier, resistors for voltage setting, output
current limit circuit, a driver transistor, and so on. The output voltage is fixed internally in the R5220x. The output
voltage of the DC/DC converter and the LDO can be set independently.
PWM step-down DC/DC converter / LDO alternative circuit is active with Mode Pin of the R5220x Series. Thus,
when the load current is small, the operation can be switching into the LDO operation from PWM operation by
the logic of MODE pin and the consumption current of the IC itself will be small at light load current. As protection
circuits, the current limit circuit which limits peak current of Lx at each clock cycle, and the latch type protection
circuit which works if the term of the over-current condition keeps on a certain time in PWM mode. Latch-type
protection circuit works to latch an internal driver with keeping it disable. To release the protection, after disable
this IC with a chip enable circuit, enable it again, or restart this IC with power-on or make the supply voltage at
UVLO detector threshold level or lower than UVLO.
FEATURES
• Supply Current................................................................Typ. 350μA (DC/DC), Typ. 5μA (VR)
• Standby Current..............................................................Typ. 0.1μA
• Built-in Driver ON Resistance .........................................P-channel 0.5Ω, N-channel 0.5Ω (at VIN=3.6V)
• Output Current ................................................................Min. 400mA (DC/DC), Min. 50mA (VR)
• Input Voltage ...................................................................2.8V to 5.5V (Absolute Input Maximum: 6.5V)
• Output Voltage ................................................................1.0V to 3.3V (0.1V steps)
(For other voltages, please refer to MARK INFORMATIONS.)
>
• Output Voltage Accuracy.................................................±2.0% (VOUT 1.5), ±30mV (VOUT <1.5V)
• Oscillator Frequency (DC/DC) ........................................Typ. 1.2MHz
• Package ..........................................................................SON-6, DFN(PLP)2514-6
• Built-in Soft-start Function...............................................Typ. 0.2ms
• Latch-type Protection Function (Delay Time)..................Typ. 3.0ms
• Built-in fold-back protection circuit (DC/DC, VR)
• Ceramic Capacitor is recommended.
APPLICATIONS
• Power source for portable equipment such as DSC, DVC, and communication equipment.
1
R5220x
BLOCK DIAGRAM
VIN
OSC
OUTPUT
CONTROL
LX
Vref
Current Limit
Soft
Start
1
MODE∗
VOUT
CE
Vref
Current Limit
GND
*1) R5220xxxxA: DC/DC mode: Mode pin= "H", VR mode: Mode pin= "L"
R5220xxxxB: DC/DC mode: Mode pin= "L", VR mode: Mode pin= "H"
SELECTION GUIDE
In the R5220x Series, the output voltage, the version and the pin polalities for the ICs can be selected at the
user's request.
Product Name
R5220Kxx∗$-TR
R5220Dxx∗$-TR-FE
package
DFN(PLP)2514-6
SON-6
Quantity per Reel
5,000 pcs
Pb Free
Halogen Free
○
○
○
○
3,000 pcs
xx： Output Voltage (VOUT) or serial number.
The output voltage can be designed in the range from 1.0V(10) to 3.3V(33) in 0.1V steps.
( If selected the custum-made product)The output voltage can be designed by Serial numbers.
Please refer to the attached Mark Informations.
∗
：（1）Standard (DC/DC output voltage = LDO output voltage)
（2）Custom-made (DC/DC output voltage ≠ LDO output voltage)
$ ：Designation of chip enable and Mode pin polarities
（A）Mode pin; "H"=DC/DC converter mode, "L"=LDO Mode
（B）Mode pin; "L"=DC/DC converter mode, "H"=LDO Mode
2
R5220x
PIN CONFIGURATIONS
SON-6
DFN(PLP)2514-6
Top View Bottom View
Top View
Bottom View
6
5
4
4
5
6
6 5 4
4 5 6
∗
∗
1 2 3
3 2 1
1
2
3
3
2
1
PIN DESCRIPTIONS
Pin No
Symbol
Description
1
2
Lx
LX Pin Voltage Supply Pin
Ground Pin
GND
Mode changer Pin
(Refer to the Selection Guide)
3
MODE
4
5
6
CE
VOUT
VIN
Chip Enable Pin (active with "H")
Output Pin
Voltage Supply Pin
∗1) Tab is GND level. (They are connected to the reverse side of this IC.)
The tab is better to be connected to the GND, but leaving it open is also acceptable.
3
R5220x
ABSOLUTE MAXIMUM RATINGS
Symbol
Item
Rating
6.5
Unit
V
VIN
VIN Supply Voltage
VLX
LX Pin Voltage
V
−0.3 to VIN+0.3
−0.3 to 6.5
−0.3 to 6.5
−0.3 to VIN+0.3
600
VCE
CE Pin Input Voltage
V
VMODE
VOUT
ILX
MODE Pin Input Voltage
VOUT Pin Voltage
V
V
LX Pin Output Current
mA
mA
IOUT
VOUT Pin Output Current
Power Dissipation (SON-6)*
Power Dissipation (DFN(PLP)2514-6)*
Operating Temperature Range
Storage Temperature Range
200
500
PD
mW
730
Topt
Tstg
−40 to 85
−55 to 125
°C
°C
*) For Power Dissipation, please refer to PACKAGE INFORMATION.
ABSOLUTE MAXIMUM RATINGS
Electronic and mechanical stress momentarily exceeded absolute maximum ratings may cause the
permanent damages and may degrade the life time and safety for both device and system using the device
in the field.
The functional operation at or over these absolute maximum ratings is not assured.
RECOMMENDED OPERATING CONDITIONS (ELECTRICAL CHARACTERISTICS)
All of electronic equipment should be designed that the mounted semiconductor devices operate within the
recommended operating conditions. The semiconductor devices cannot operate normally over the
recommended operating conditions, even if when they are used over such conditions by momentary
electronic noise or surge. And the semiconductor devices may receive serious damage when they continue
to operate over the recommended operating conditions.
4
R5220x
ELECTRICAL CHARACTERISTICS
• R5220xxxxA
Topt=25°C
Symbol
Item
Conditions
Min. Typ. Max. Unit
VIN
Input Voltage
2.8
5.5
V
Supply Current 1
(Standby mode)
VIN=VOUT1+1.0V, VCE=GND, VMODE=GND or VIN
VOUT1:DC/DC Set VOUT
ISS1
0.1
1.0
μA
Supply Current 2
(Power Save mode)
Supply Current 3
VIN=VCE=VOUT2+1.0V, VMODE=GND
VOUT2:VR Set VOUT, IOUT=0mA
VIN=VCE=VMODE=3.6V
ISS2
ISS3
5
10
μA
μA
350
450
DC/DC Part
Symbol
Topt=25°C
Item
Output Voltage
Conditions
Min.
Typ.
Max.
Unit
>
VOUT1
1.5
×0.98
−0.03
0.96
×1.02
+0.03
1.44
0.30
0.35
VIN=3.6V
VOUT1
fosc
V
IOUT=50mA
VOUT1 < 1.5
Oscillator Frequency
Soft-start Time
1.20
0.15
0.20
0.5
MHz
ms
VIN=3.6V
VOUT1 < 1.5
TSTART
VIN=3.6V
>
VOUT1
1.5
RONP
RONN
ON Resistance of Pch Transistor
ON Resistance of Nch Transistor
Lx Leakage Current
VIN=3.6V, ILX=−100mA
VIN=3.6V, ILX=−100mA
VIN=5.5V, VCE=0V, LX=5.5V/0V −1.0
Ω
Ω
μA
0.5
ILXLEAK
1.0
ΔVOUT/
ΔTopt
Output Voltage
Temperature Coefficient
−40°C Topt 85°C
±150
ppm/°C
=
=
Maxduty Oscillator Maximum Duty Cycle
100
500
1.0
2.00
2.05
1.0
%
mA
ms
V
V
V
VOUT=0V
VIN=3.6V
VIN=3.6V
VIN=VCE=VMODE, VOUT=0V
VIN=VCE=VMODE, VOUT=0V
ILXlim
Tprot
Lx Current Limit
800
3.0
2.35
2.45
Protection Delay Circuit
UVLO Threshold Voltage
UVLO Released Voltage
MODE "H" Input Voltage
MODE "L" Input Voltage
7.0
2.75
2.80
VUVLO1
VUVLO2
VMODEH
VMODEL
0
0.3
V
VR Part
Symbol
Topt=25°C
Item
Conditions
Min.
Typ.
Max.
×1.02
+0.03
Unit
>
VOUT2
1.5
VIN=VOUT2+1.0V
×0.98
−0.03
50
=
VOUT2
IOUT
Output Voltage
Output Current
V
IOUT=10mA
VOUT2 < 1.5
mA
VIN=VOUT2+1.0V
VOUT2 < 2.3
15
25
35
0.7
0.3
40
50
65
ΔVOUT2/
ΔIOUT
VIN=VOUT2+1.0V
Load Regulation
Dropout Voltage
mV
V
2.3 VOUT2 < 3.0
=
VOUT2
<
10μA
IOUT
25mA
=
=
>
3.0
=
VOUT2 < 1.8
VDIF
IOUT=50mA
>
VOUT2
1.8
=
<
2.8V VIN 5.5V
=
=
VOUT2 < 2.3
IOUT=25mA
ΔVOUT2/
ΔVIN
Line Regulation
Ripple Rejection
0.2
%/V
VOUT2+0.5V VIN 5.5V
=
>
VOUT2
2.3
=
IOUT=25mA
RR
Refer to Typical Characteristics
dB
ΔVOUT/ Output Voltage
ΔTopt
IOUT=30mA,
±100
ppm/°C
Temperature Coefficient
−40°C Topt 85°C
=
Ilim
IPDC
VCEH
VCEL
Short Current Limit
CE pull-down current
CE "H" Input Voltage
CE "L" Input Voltage
60
0.40
mA
μA
V
VOUT=0V
0.12
1.0
0
0.70
0.3
V
5
R5220x
• R5220xxxxB
Symbol
Topt=25°C
Item
Conditions
Min. Typ. Max. Unit
VIN
Input Voltage
2.8
5.5
V
Supply Current 1
(Standby mode)
VIN=VOUT1+1.0V, VCE=GND, VMODE=GND or VIN
VOUT1:DC/DC Set VOUT
ISS1
0.1
1.0
μA
Supply Current 2
(Power Save mode)
Supply Current 3
VIN=VCE=VMODE=VOUT2+1.0V,
VOUT2:VR Set VOUT, IOUT=0mA
VIN=VCE=3.6V, VMODE=GND
ISS2
ISS3
5
10
μA
μA
350
450
DC/DC Part
Symbol
Topt=25°C
Item
Conditions
Min.
×0.98
−0.03
Typ.
Max.
Unit
>
VOUT1
1.5
VIN=3.6V
×1.02
+0.03
1.44
0.30
0.35
=
VOUT1
fosc
Output Voltage
V
IOUT=50mA
VOUT1<1.5
Oscillator Frequency
Soft-start Time
0.96
1.20
0.15
0.20
0.5
MHz
ms
VIN=VSET1+1.5V
VOUT1<1.5
TSTART
VIN=3.6V
>
VOUT1
1.5
=
RONP
RONN
ILXLEAK
ON Resistance of Pch Transistor
ON Resistance of Nch Transistor
Lx Leakage Current
VIN=3.6V, ILX=−100mA
VIN=3.6V, ILX=−100mA
VIN=5.5V, VCE=0V, LX=5.5V/0V
Ω
Ω
μA
0.5
1.0
−1.0
ΔVOUT/ Output Voltage
ΔTopt
−40°C Topt 85°C
±150
ppm/°C
=
Temperature Coefficient
Maxduty Oscillator Maximum Duty Cycle
100
500
1.0
2.00
2.05
1.0
%
mA
ms
V
V
V
VOUT=0V
VIN=3.6V
VIN=3.6V
VCE=VIN, VMODE=GND, VOUT=0V
VCE=VIN, VMODE=GND, VOUT=0V
ILXlim
Tprot
VUVLO1
VUVLO2
Lx Current Limit
800
3.0
2.35
2.45
Protection Delay Circuit
UVLO Threshold Voltage
UVLO Released Voltage
7.0
2.75
2.80
VMODEH MODE "H" Input Voltage
VMODEL
MODE "L" Input Voltage
0
0.3
V
VR Part
Symbol
Topt=25°C
Item
Output Voltage
Output Current
Conditions
Min.
×0.98
−0.03
50
Typ.
Max.
×1.02
+0.03
Unit
>
VOUT2
1.5
VIN=VOUT2+1.0V
IOUT=10mA
=
VOUT2
IOUT
V
VOUT2<1.5
mA
VIN=VOUT2+1.0V
VOUT2<2.3
15
25
35
40
50
65
ΔVOUT2/
ΔIOUT
VIN=VOUT2+1.0V
Load Regulation
mV
V
2.3 VOUT2<3.0
=
VOUT2
<
10μA
IOUT
25mA
=
=
>
3.0
=
VOUT2<1.8V
0.7
0.3
VDIF
Dropout Voltage
IOUT=50mA
>
VOUT2
1.8V
=
<
2.8V VIN 5.5V
=
VOUT2<2.3V
IOUT=25mA
VOUT2+0.5V VIN 5.5V
IOUT=25mA
ΔVOUT2/
ΔVIN
Line Regulation
Ripple Rejection
0.2
%/V
=
>
VOUT2
2.3V
=
RR
Refer to Typical Characteristics
dB
ΔVOUT/ Output Voltage
ΔTopt
IOUT=30mA,
±100
ppm/°C
<
Temperature Coefficient
−40°C Topt 85°C
=
=
Ilim
Short Current Limit
CE pull-down current
CE "H" Input Voltage
CE "L" Input Voltage
60
0.40
mA
μA
V
VOUT=0V
IPDC
0.12
1.0
0
0.70
0.3
VCEH
VCEL
V
6
R5220x
TYPICAL APPLICATION
V
IN
CIN 10μF
L 4.7μH
6
1
Lx
VIN
R5220x
Series
Load
OUT 10μF
2
5
4
GND
V
OUT
C
3
MODE
CE
Parts Recommendation
CIN
10μF Ceramic Capacitor C2012JB0J106K (TDK)
10μF Ceramic Capacitor C2012JB0J106K (TDK)
4.7μH VLP5610T-4R7MR90 (TDK)
COUT
L
External Components
• Set external components such as an inductor, CIN, COUT as close as possible to the IC, in particular,
minimize the wiring to VIN pin and GND pin. If VDD line or GND line’s impedance is high, the internal voltage
level of the IC may fluctuate and the operation may be unstable. Make GND line and VDD line sufficient.
Through the VDD line, the GND line, the inductor, Lx pin, and VOUT line, a large current caused by switching
may flow, therefore, those lines should be sufficient and avoid the cross talk with other sensitive lines. Use
the individual line from the VOUT pin of the IC for the inductor and the capacitor and load.
• Use a low ESR ceramic capacitor COUT/CIN with a capacity of 10μF or more.
• Select an inductor with an inductance range from 4.7μH to 10μH. The internal phase compensation is
secured with these inductance values and COUT value. Choose the inductor with a low DC resistance and
enough permissible current and hard to reach magnetic saturation. In terms of inductance value, choose the
appropriate value with considering the conditions of the input voltage range and the output voltage, and
load current. If the inductance value is too small and the load current is large, the peak current of Lx may
reach the Lx current limit, and the protection against over-current may work.
• The protection circuit against over-current is affected by the self-heating and the heat radiation environment.
Therefore evaluate under the considerable environment of the application.
The performance of power source circuits using these ICs extremely depends upon the peripheral circuits.
Pay attention in the selection of the peripheral circuits. In particular, design the peripheral circuits in a way that
the values such as voltage, current, and power of each component, PCB patterns and the IC do not exceed their
respected rated values.
7
R5220x
OPERATION of step-down DC/DC converter and Output Current
The step-down DC/DC converter charges energy in the inductor when LX transistor is ON, and discharges the
energy from the inductor when LX transistor is OFF and controls with less energy loss, so that a lower output
voltage than the input voltage is obtained. The operation will be explained with reference to the following
diagrams:
<Basic Circuits>
<Current through L>
IL
i1
ILmax
IOUT
VOUT
ILmin
L
Pch Tr
Nch Tr
topen
V
IN
i2
CL
t
GND
ton
toff
T=1/fosc
Step 1: P-channel Tr. turns on and current IL (=i1) flows, and energy is charged into CL. At this moment, IL
increases from ILmin (=0) to reach ILmax in proportion to the on-time period (ton) of P-channel Tr.
Step 2: When P-channel Tr. turns off, Synchronous rectifier N-channel Tr. turns on in order that L maintains IL
at ILmax, and current IL (=i2) flows.
Step 3: IL (=i2) decreases gradually and reaches IL=ILmin=0 after a time period of topen, and N-channel Tr.
Turns off. Provided that in the continuous mode, next cycle starts before IL becomes to 0 because toff
time is not enough. In this case, IL value increases from this ILmin (>0).
In the case of PWM control system, the output voltage is maintained by controlling the on-time period (ton), with
the oscillator frequency (fosc) being maintained constant.
The maximum value (ILmax) and the minimum value (ILmin) of the current flowing through the inductor are the
same as those when P-channel Tr. turns on and off.
The difference between ILmax and ILmin, which is represented by ΔI;
ΔI = ILmax − Ilmin = VOUT × topen / L = (VIN − VOUT) × ton / L.........................................Equation 1
wherein, T = 1 / fosc = ton + toff
duty (%) = ton / T × 100 = ton × fosc × 100
<
topen toff
=
In Equation 1, VOUT × topen / L and (VIN − VOUT) × ton / L respectively show the change of the current at "ON", and
the change of the current at "OFF".
8
R5220x
OUTPUT CURRENT AND SELECTION OF EXTERNAL COMPONENTS
When P-channel Tr. of LX is ON:
(Wherein, Ripple Current P-P value is described as IRP, ON resistance of P-channel Tr. and N-channel Tr. of LX
are respectively described as RONP and RONN, and the DC resistor of the inductor is described as RL.)
VIN = VOUT + (RONP + RL) × IOUT + L × IRP / ton................................................................... Equation 2
When P-channel Tr. of LX is "OFF" (N-channel Tr. is "ON"):
L × IRP / toff = RONN × IOUT + VOUT + RL × IOUT .................................................................. Equation 3
Put Equation 3 to Equation 2 and solve for ON duty of P-channel transistor, ton / (toff + ton) = DON,
DON = (VOUT – RONN × IOUT + RL × IOUT) / (VIN + RONN × IOUT – RONP × IOUT) ........................... Equation 4
Ripple Current is as follows;
IRP = (VIN − VOUT − RONP × IOUT − RL × IOUT) × DON / fosc / L ............................................... Equation 5
wherein, peak current that flows through L, and LX Tr. is as follows;
ILmax = IOUT + IRP / 2...................................................................................................... Equation 6
Consider ILmax, condition of input and output and select external components.
The above explanation is directed to the calculation in an ideal case in continuous mode.
9
R5220x
TIMING CHART
1) IC start-up
The timing chart as shown in the next describes the operation starting the IC is enabled with CE. When the CE
pin voltage becomes higher than the threshold voltage, the IC’s operations starts. At first, only the voltage
regulator (VR) starts. The threshold level of the CE pin is between CE “H” input voltage and CE “L” input voltage.
After starting the operation, the output capacitor (COUT) is charged with the output current of the VR, and the
output level becomes the set VR output voltage. At this moment, the output of Lx is “off”, (“Hi-Z”), the pin voltage,
VLX=VOUT through the external inductor L.
Secondly, the Mode pin voltage is higher than the threshold voltage, internal operation of DC/DC starts. The
threshold level is between Mode “H” input voltage and Mode “L” input voltage. The soft-start circuit inside the
DC/DC converter’s operation is as follows:
(Case 1) DC/DC output voltage < VR output voltage
After the soft-start time, while the output voltage level is down from the VR output voltage to DC/DC output
voltage, the circuit is waiting for the start of DC/DC operation. When the output voltage reaches so set DC/DC
output voltage level, the actual DC/DC operation starts.
(Case 2) DC/DC output voltage> VR output voltage
The soft-start circuit of DC/DC converter makes the voltage reference unit of the IC rise gradually and be
constant. After the voltage reference unit reaches the constant level which the output voltage of DC/DC
converter can balance becomes the output voltage of VR, the set output voltage of DC/DC converter may be
realized.
Therefore, the soft-start time means the time range of starting to the time when the voltage reference unit
reaches the constant level, and the soft-start time is different from turning on speed in some cases. The
operation starting time depends on the ability of the power supply, the load current, the inductance value, the
capacitance value, and the voltage difference between the set VR output and the set DC/DC output.
If CE and Mode are on at once, the same operation as above is happened except the VR start-up and
Soft-start operation start at the same time.
If Mode signal is forced earlier than CE signal, this IC is stand-by until CE signal comes. Therefore when the
CE signal is set, the IC operation starts as above.
• VOUT voltage rising speed at start-up with power supply is affected by the next conditions:
1.The turning on speed of VIN voltage limited by the power supply to the IC and the input capacitor CIN.
2.The output capacitor, COUT value and load current.
• DC/DC operation starting time
>
1.If the VR output DC/DC output, the operation starting time of the DC/DC converter is approximately equal to
the next formula.
TDC/DC_ACT = TSS + (VOUT_VR − VOUT_DC/DC + 15mV) × COUT / (load current at mode change + 1μA)
TSS: Soft-start time
VOUT_VR: VR output voltage
VOUT_DC/DC: DC/DC Output Voltage
*1μA is the supply current of the IC itself for the output.
2.If the VR output < DC/DC output, the operation starting time is the soft-start time + starting operation time
which depends on the power supply, the load current, and the external components.
10
R5220x
V
CEH
CE pin input signal
V
CEL
V
MODEH
MODE pin input signal
V
MODEL
Soft start time
IC DC/DC Voltage Reference Unit
A.VR Output=DC/DC Output voltage
V
OUT
Effect from Power Supply, Load Current, Extemal Components
Lx voltage
DC/DC Operation
B.VR voltage > DC/DC Output
V
OUT
DC/DC does not operate if VR output is larger than
DC/DC
Lx voltage
DC/DC Operation
C. VR voltage < DC/DC voltage
V
OUT
Lx voltage
DC/DC Operating
If CE pin input signal is forced earlier than the supply voltage, the voltage difference between the input and the
output which is according to the input voltage to VIN, is maintained and the VOUT is rising up.
11
R5220x
TEST CIRCUITS
OSCILLOSCOPE
Lx
VIN
Lx
VIN
V
OUT
ND
V
OUT
GND
A
MODE
CE
MODE
CE
Supply Current 1,2,3
Output Voltage(DC/DC)
OSCILLOSCOPE
OSCILLOSCOPE
Lx
VIN
Lx
VIN
V
OUT
GND
G
N
D
V
OUT
MODE
CE
MODE
CE
Oscillator Frequency
Soft-start Time
OSCILLOSCOPE
Lx
VIN
Lx
VIN
V
OUT
GND
V
OUT
GND
A
MODE
CE
MODE
CE
Lx Leakage Current
Lx Current Limit, Output Delay for Protection
Lx Pch transistor ON resistance
Nch transistor ON resistance
12
R5220x
OSCILLOSCOPE
OSCILLOSCOPE
Lx
Lx
V
IN
VIN
VOUT
V
OUT
G
N
D
GND
MODE
MODE
CE
CE
A
UVLO Detector Threshold UVLO Release Voltage
MODEInput Voltage ”H”,”L” Input Current
Lx
Lx
V
IN
VIN
VOUT
N
D
V
OUT
GND
MODE
MODE
CE
CE
Network
Analyzer
V
Output Voltage (VR), Load Regulation
Line Regulation, Dropout Voltage
(J) RippleRejection
Lx
Lx
V
IN
VIN
VOUT
N
D
V
OUT
GND
MODE
MODE
A
CE
CE
V
A
Short Current Limit
CE=”H”/”L” Input Voltage/ Input Current
13
R5220x
TYPICAL CHARACTERISTICS
1) DC/DC Converter
1-1) DC/DC Output Voltage vs. Output Current
1-2) DC/DC Output Voltage vs. Input Voltage
R5220x181A
R5220x181A
1.84
1.84
1.83
1.82
1.81
1.80
1.79
1.83
1.82
1.81
1.80
1.79
1mA
50mA
250mA
1.78
2.8V
1.78
1.77
1.76
3.6V
1.77
5.5V
1.76
0
100
200
300
400
2.5
3.0
3.5
4.0
4.5
5.0
5.5
Input Voltage(V)
Output Current(mA)
1-3) DC/DC Efficiency vs. Output Current
1-4) DC/DC Supply Current vs. Temperature
R5220x181A
V
IN=VCE=VMODE=3.6V
100
80
60
40
20
0
400
380
360
340
320
300
280
260
240
220
200
2.8V
3.6V
5.5V
DC/DC_VSET : 1.0V
DC/DC_VSET : 1.8V
0.1
1
10
100
1000
-50 -25
0
25
50
75
100
Output Current(mA)
Temperature Topt(°C)
1-5) DC/DC Supply Current vs. Input Voltage
1-6) DC/DC Output Waveform
R5220x121A
C
IN=COUT=Ceramic 10μF,L=4.7μH
IN=3.6V,IOUT=300mA
VIN=VCE=VMODE
V
400
380
360
340
320
300
280
260
240
220
200
1.26
1.24
1.22
1.20
1.18
1.16
1.14
-50 -25
0
25
50
75
100
0
1
2
3
4
5
Input Voltage(V)
Time(μs)
14
R5220x
1-7) DC/DC Output Voltage vs. Temperature
R5220x181A
R5220x181A
IOUT=50mA
1.86
1.84
1.82
1.80
1.78
1.76
1.74
1.90
1.88
1.86
1.84
1.82
1.80
1.78
1.76
1.74
1.72
1.70
0
1
2
3
4
5
-50 -25
0
25
50
75
100
Time(μs)
Temperature Topt(°C)
1-8) DC/DC Oscillator Frequency vs. Temperature 1-9) DC/DC Oscillator Frequency vs. Input Voltage
R5220x181A
V
IN=3.6V
1350
1300
1250
1200
1150
1100
1050
1400
1350
1300
1250
1200
1150
1100
1050
1000
2.5
3.0
3.5
4.0
4.5
5.0
5.5
-50 -25
0
25
50
75
100
Input Voltage(V)
Temperature Topt(°C)
1-10) Soft-start time vs. Temperature
1-11) UVLO Detector Threshold/ Released Voltage vs.
Temperature
2.8
250
200
150
100
2.7
UVLO Detector Threshold
2.6
UVLO Released Voltage
2.5
2.4
2.3
2.2
2.1
2.0
DC/DC_VSET : 1.0V
DC/DC_VSET : 1.8V
50
0
-50 -25
0
25
50
75
100
-50 -25
0
25
50
75
100
Temperature Topt(°C)
Temperature Topt(°C)
15
R5220x
1-12) MODE Input Voltage vs. temperature
1-13) Pch Transistor On Resistance vs. Temperature
VIN=3.6V
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0.0
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0.0
-50 -25
0
25
50
75
100
-50 -25
0
25
50
75
100
Temperature Topt(°C)
Temperature Topt(°C)
1-14) Nch Transistor On Resistance vs.
Temperature
1-15) DC/DC Lx Current Limit vs. Temperature
R5220x131A
V
IN=3.6V
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0.0
1200
1000
800
600
400
-50 -25
0
25
50
75
100
-50 -25
0
25
50
75
100
Temperature Topt(°C)
Temperature Topt(°C)
2) VR
2-1) VR Output Voltage vs. Output Current
R5220x121A
R5220x181A
1.4
2.0
1.8
1.6
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0.0
1.2
1.0
0.8
0.6
0.4
0.2
0.0
VIN=2.8V
VIN=3.6V
VIN=5.5V
VIN=2.8V
VIN=3.6V
VIN=5.5V
0
50
100
150
200
0
50
100
150
200
Output Current IOUT(mA)
Output Current IOUT(mA)
16
R5220x
2-2) VR Output Voltage vs. Input Voltage
R5220x121A
R5220x181A
1.4
2.0
1.8
1.6
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0
1.2
1.0
0.8
0.6
I
I
I
OUT=1mA
I
I
I
OUT=1mA
OUT=25mA
OUT=50mA
0.4
0.2
0.0
OUT=25mA
OUT=50mA
0
1
2
3
4
5
6
0
1
2
3
4
5
6
Input Voltage VIN(V)
Input Voltage VIN(V)
2-3) VR Supply Current vs. Input Voltage
R5220x121A
R5220x181A
8.0
8.0
7.0
6.0
5.0
4.0
3.0
2.0
1.0
0.0
7.0
6.0
5.0
4.0
3.0
2.0
1.0
0.0
0
1
2
3
4
5
6
0
1
2
3
4
5
6
Input Voltage VIN(V)
Input Voltage VIN(V)
2-4) VR Output Voltage vs. Temperature
R5220x121A
R5220x181A
1.24
1.84
1.83
1.82
1.81
1.80
1.79
1.78
1.77
1.76
1.23
1.22
1.21
1.20
1.19
1.18
1.17
1.16
-50 -25
0
25
50
75
100
-50 -25
0
25
50
75
100
Temperature Topt(°C)
Temperature Topt(°C)
17
R5220x
2-5) VR Supply Current vs. Temperature
R5220x121A
R5220x181A
10
9
10
9
8
7
6
5
4
3
2
1
0
8
7
6
5
4
3
2
1
0
V
V
IN=3.6V
IN=5.5V
V
V
IN=3.6V
IN=5.5V
-50 -25
0
25
50
75
100
-50 -25
0
25
50
75
100
Temperature Topt(°C)
Temperature Topt(°C)
2-6) Dropout Voltage vs. Output Current
R5220x121A
R5220x181A
800
1.86
1.84
1.82
1.80
1.78
1.76
1.74
700
600
500
400
300
200
100
0
-40°C
25°C
85°C
0
1
2
3
4
5
0
10
20
30
40
50
Time(μs)
Output Current IOUT(mA)
2-7) Ripple Rejection vs. Input Voltage
R5220x121A
R5220x181A
Ripple 0.2Vp-p,IOUT=25mA,
Ripple 0.2Vp-p,IOUT=25mA,
C
IN=none,COUT=Ceramic10μF
C
IN=none,COUT=Ceramic10μF
80
70
60
50
40
30
20
10
0
80
70
60
50
40
30
20
10
0
f=400Hz
f=1kHz
f=10kHz
f=100kHz
f=400Hz
f=1kHz
f=10kHz
f=100kHz
1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5
1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5
Input Voltage VIN(V)
Input Voltage VIN(V)
18
R5220x
2-8) VR Ripple Rejection vs. Frequency
R5220x121A
R5220x181A
VIN=2.8V+0.2Vp-p
V
IN=2.2V+0.2Vp-p
C
IN=none COUT=Ceramic10μF
C
IN=none COUT=Ceramic10μF
100
90
80
70
60
50
40
30
20
10
0
100
90
80
70
60
50
40
30
20
10
0
I
I
I
OUT=50mA
OUT=25mA
OUT=1mA
I
I
I
OUT=50mA
OUT=25mA
OUT=1mA
0.1
1
10
100
0.1
1
10
100
Frequency f (kHz)
Frequency f (kHz)
2-9) Input Transient Response
R5220x121A
R5220x181A
IOUT=10mA
I
OUT=10mA
C
IN=none, COUT=Ceramic10μF
C
IN=none, COUT=Ceramic10μF
1.28
1.26
1.24
1.22
1.20
1.18
1.16
5
4
3
2
1
0
1.88
1.86
1.84
1.82
1.80
1.78
1.76
5
4
3
2
1
0
0.0
0.2
0.4
0.6
0.8
1.0
0.0
0.2
0.4
0.6
0.8
1.0
Time T(ms)
Time T(ms)
2-10) Load Transient Response
R5220x121A
R5220x121A
V
IN=3.6V,CIN=COUT=Ceramic10μF
V
IN=3.6V,CIN=COUT=Ceramic10μF
1.40
1.35
1.30
1.25
1.20
1.15
1.10
50
25
0
1.40
1.35
1.30
1.25
1.20
1.15
1.10
50
25
0
1mA
25mA 1mA
0mA
10mA 0mA
0.0
0.8
1.6
2.4
3.2
4.0
0.0
0.8
1.6
2.4
3.2
4.0
Time T(μs)
Time (μs)
19
R5220x
R5220x181A
R5220x181A
V
IN=3.6V,CIN=COUT=Ceramic10μF
V
IN=3.6V,CIN=COUT=Ceramic10μF
2.00
1.95
1.90
1.85
1.80
1.75
1.70
50
25
0
2.00
1.95
1.90
1.85
1.80
1.75
1.70
50
25
0
1mA
25mA
1mA
0mA
10mA
0mA
0.0
0.8
1.6
2.4
3.2
4.0
0.0
0.8
1.6
2.4
3.2
4.0
Time T(μs)
Time T(μs)
3) Mode Transient Response between VR and DC/DC
3-1) VR to DC/DC Mode Transient Response
3-2) DC/DC to VR Mode Transient Response
R5220x151A
R5220x151A
V
IN=3.6V,IOUT=0.5mA
V
IN=3.6V,IOUT=0.5mA
C
IN=COUT=Ceramic10μF
C
IN=COUT=Ceramic10μF
1.60
1.55
1.50
1.45
1.40
1.35
1.30
20
1.60
1.55
1.50
1.45
1.40
1.35
1.30
20
16
12
8
16
12
8
V
OUT
V
OUT
4
4
V
MODE
V
MODE
0
0
0
200
400
600
800 1000
0
200
400
600
800 1000
Time (μs)
Time (μs)
20
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discontinuation of production without notice for reasons such as improvement. Therefore, before
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■
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