RP500X

RP500X RICOH | Alldatasheet

Document overview

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Technical content

NO.EA-155-070919 OUTLINE The RP500X Series are CMOS-based step-down DC/DC Converters with synchronous rectifier. Each of these ICs consists of an oscillator, a switching control circuit, a reference voltage unit, an error amplifier, a soft-start circuit, protection circuits, UVLO circuit, switching transistors, and so on. A low ripple, high efficiency step-down DC/DC converter can be easily composed of this IC with only an inductor and capacitors. In terms of the output voltage, since the feedback resistances are built-in, the voltage is fixed internally. 50mV(custom-made) step output can be set by laser-trim and 1.5% or 24mV tolerance depending on the output voltage is guaranteed. Mode alternative circuit works automatically for improving the efficiency. Considering fixed noise frequency, PWM fixed control type is also available. 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 exist. The latch-type protection circuit works to latch an internal driver with keeping it disable. To release the condition of the protection, after disabling 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. Since packages are PLP1820-6, SOT23-6, WLCSP-6 (0.16 φ), high density mounting on boards is possible.

FEATURES

±24mV (Vout<1.6V) device.)

APPLICATIONS

/G13Power source for portable equipment such as cellular, PDA, DSC, Notebook PC /G13Power source for HDD /G13Power source for Li-ion battery-used equipment

2.8 2.9 PLP-1820-6 1 23 64 5 2.0 1.8 TOP VIEW WL-CSP-6 (Under Development) 6 5 4 1 3 2 BUMP SIDE 0.87 1.27 SWITCHING CONTROL CURRENT PROTECTION SOFT START VREF LX VOUT VIN CE PGND OSCILLATOR PWM CURRENT FEEDBACK RAMP COMPENSATION UVLO AGND CHIP ENABLE

Pin No. Symbol Pin Description

1 V OUT Output

2 PGND Ground

3 L X Lx Switching

4 V IN Voltage Supply

5 AGND Ground

6 CE Chip Enable (High Active)

Pin No. Symbol Pin Description

1 CE Chip Enable (High Active)

2 AGND Ground

3 V IN Voltage Supply

4 L X Lx Switching

5 PGND Ground

6 V OUT Output

Vin Supply Voltage VIN 6.5 V Lx Pin Voltage VLX -0.3 to VIN+0.3 V CE Pin Input Voltage VCE -0.3 to VIN+0.3 V Vout Pin Voltage VOUT -0.3 to VIN+0.3 V Lx Pin Output Current ILX 800 mA PLP 880 SOT 430 Power Dissipation PD WLCSP T.B.D. mW Operating Temp. Range Topt -40 to 85 °C Storage Temp. Range Tstg -55 to 125 °C

ç Selection Guide ç In the RP500 series, output voltage, function options, etc. can be designated with user's request. Part number can be designated as follows: ç çç RP500Xxxxx-xx ˡ Part Number ç ç Code Contents a Designation of the package K: PLP-1820-6 N: SOT-23-6W Z: WL-CSP-6 (Under Development) b Designation of output voltage Designation is possible in the range from 1.1V to 3.3V with a step of 0.1V c Designation of the function (with or without PWM/PFM Alternative function, auto discharge function) 1:with PWM/PFM alternative, without auto discharge 2:without PWM/PFM alternative, without auto discharge 4:without PWM/PFM alternative function, with auto discharge function d Frequency A: 1.2MHz e Designation of the taping type: (-TR is the standard.) ˢ ˢˢˢ ˢ a b c d e * 0.05V step is also available as a custom code.

ELECTRICAL CHARACTERISTICS

Symbol Item Condition Min. Typ. Max. Unit VIN Operating Input Voltage 2.55 5.50 V VOUT Step-down Output Voltage VIN=VCE=3.6V or VSET+1V V OUT≥1.6V VOUT<1.6V -1.5% -0.024 +1.5% 0.024 V ∆VOUT/∆T Step-down Output Voltage Temperature Coefficient -40°C≤TOPT≤85°C ±100 ppm/°C FOSC Oscillator Frequency VIN=VCE=3.6V or VSET+1V -20% 1.2 +20% MHz ISS1 Supply Current 1 VIN=VCE=5.5V,VOUT=0 400 500 µA ISS2 Supply Current 2 VIN=VCE=5.5V,VOUT=5.5V 100 160 µA ISTB Standby Current VIN=5.5V,VCE=0V 0 5 µA ICEH CE "H" Input Current VIN=VCE=5.5V -1 0 1 µA ICEL CE "L" Input Current VIN=5.5V,VCE=0V -1 0 1 µA IVOUTH VOUT "H" Input Current VIN=VOUT=5.5V,VCE=0V -1 0 1 µA IVOUTL VOUT "L" Input Current VIN=5.5V,VCE=VOUT=0V -1 0 1 µA ILXLEAKH Lx Leakage Current "H" VIN=VLx=5.5V,VCE=0V -1 0 5 µA ILXLEAKL Lx Leakage Current "L" VIN=5.5V,VCE=VLx=0V -5 0 1 µA VCEH CE "H" Input Voltage VIN=5.5V 1.0 V VCEL CE "L" Input Voltage VIN=5.5V 0.4 V RONP On Resistance of Pch Tr. ILx=-100mA 0.5 Ω RONN On Resistance of Nch Tr. ILx=-100mA 0.5 Ω Maxdty Max Duty Ratio 100 % TSTART Soft-start Time VIN=VCE=3.6V or VSET+1V 120 150 µs ILXLIM Lx Current Limit VIN=VCE=3.6V or VSET+1V 600 900 mA TPROT Protection Delay Time VIN=VCE=3.6V or VSET+1V 0.5 1.5 5.0 ms VUVLO1 UVLO Detector Voltage VIN=VCE 2.1 2.2 2.3 V VUVLO2 UVLO Released Voltage VIN=VCE 2.2 2.3 2.4 V *) Test circuit is "OPEN LOOP" and VIN=VCE=3.6V or VSET+1V, AGND=PGND=0V unless otherwise noted.

1) Output Voltage vs. Output Current RP500X121A RP500X251A 1.17 1.18 1.19 1.2 1.21 1.22 1.23 1 10 100 1000 Output Current(mA) Output Voltage(V) Vin=5V Vin=3.6V 2.44 2.46 2.48 2.5 2.52 2.54 2.56 1 10 100 1000 Output Current(mA) Output Voltage(V) Vin=5V Vin=3.6V RP500X331A RP500X152A 3.24 3.26 3.28 3.3 3.32 3.34 3.36 1 10 100 1000 Output Current(mA) Output Voltage(V) Vin=5V Vin=4.3V 1.47 1.48 1.49 1.5 1.51 1.52 1.53 1 10 100 1000 Output Current(mA) Output Voltage(V) Vin=5V Vin=3.6V 2) Output Voltage vs. Input Voltage RP500X121A RP500X251A 1.17 1.18 1.19 1.20 1.21 1.22 1.23 33 . 544 . 555 . 5 Input Voltage(V) Output Voltage(V) Iout=1mA Iout=50mA Iout=200mA 2.44 2.46 2.48 2.50 2.52 2.54 2.56 33 . 544 . 555 . 5 Input Voltage(V) Output Voltage(V) Iout=1mA Iout=50mA Iout=200mA

3.24 3.26 3.28 3.30 3.32 3.34 3.36 33 . 544 . 555 . 5 Input Voltage(V) Output Voltage(V) Iout=1mA Iout=50mA Iout=200mA 1.47 1.48 1.49 1.50 1.51 1.52 1.53 33 . 544 . 555 . 5 Input Voltage(V) Output Voltage(V) Iout=1mA Iout=50mA Iout=200mA 3) Efficiency vs. Output Current RP500X121A RP500X251A 100 1 10 100 1000 Output Current(mA) Efficiency(%) Vin=5V Vin=3.6V Vin=2.5V 100 1 10 100 1000 Output Current(mA) Efficiency(%) Vin=5V Vin=3.6V RP500X331A RP500X152A 100 1 10 100 1000Output Current(mA) Efficiency(%) Vin=5V Vin=4.3V 100 1 10 100 1000 Output Current(mA) Efficiency(%) Vin=5V Vin=3.6

4) Supply Current 1, 2 vs. Temperature 5) Supply Current 1,2 vs. Input Voltage RP500X151A RP500X151A VIN=VCE=5.5V 100 200 300 400 500 -50 -25 0 25 50 75 100 Temperature(C) Supply Current(uA) ISS1 ISS2 100 200 300 400 500 2.5 3.5 4.5 5.5 Input Voltage(V) Supply Current(uA) ISS1 ISS2 6) DC/DC Output Waveform RP500X121A CIN=COUT=Ceramic10uF, L=4.7uH I OUT=1mA I OUT=200mA 1.14 1.16 1.18 1.2 1.22 1.24 1.26 00 . 511 . 5 Time(ms) Output Voltage(V) 1.14 1.16 1.18 1.2 1.22 1.24 1.26

0123 Time(us)

Output Voltage(V) RP500X251A CIN=COUT=Ceramic10uF, L=4.7uH I OUT=1mA I OUT=200mA 2.44 2.46 2.48 2.5 2.52 2.54 2.56 00 . 511 . 5 Time(ms) Output Voltage(V) 2.44 2.46 2.48 2.5 2.52 2.54 2.56 Output Voltage(V)

RP500X331A CIN=COUT=Ceramic10uF, L=4.7uH I OUT=1mA I OUT=200mA 3.24 3.26 3.28 3.3 3.32 3.34 3.36 0 0.5 1 1.5 Time(ms) Output Voltage(V) 3.24 3.26 3.28 3.3 3.32 3.34 3.36 0123 Time(us) Output Voltage(V) 7) Output Voltage vs. Temperature RP500X151A RP500X331A 1.47 1.48 1.49 1.50 1.51 1.52 1.53 -50 -25 0 25 50 75 100 Temperature(C) Output Voltage(V) 3.24 3.26 3.28 3.3 3.32 3.34 3.36 -50 -25 0 25 50 75 100 Temperature(C) Output Voltage(V) 8) Oscillator Frequency vs. Temperature 9) Oscillator Frequency vs. Input Voltage V IN=3.6V 1050 1100 1150 1200 1250 1300 1350 -50 -25 0 25 50 75 100 Temperature(C) Frequency(kHz) 1050 1100 1150 1200 1250 1300 1350 2.5 3.5 4.5 5.5 Input Voltage(V) Frequency(kHz) -40C 25C 85C

10) Soft-start Time vs. Temperature 11) UVLO Detector threshold/Released Voltage vs. Temperature 100 110 120 130 140 150 160 -50 -25 0 25 50 75 100 Temperature(C) Soft-Start Time(us) 2.1 2.2 2.3 2.4 2.5 -50 -25 0 25 50 75 100 Temperature(C) Input Voltage(V) UVLO Detector Threshold UVLO Released Voltage 12) CE Input Threshold Voltage vs. Temperature 13) Lx Current Limit vs. Temperature 0.0 0.2 0.4 0.6 0.8 1.0 -50 -25 0 25 50 75 100 Temperature(C) CE Input Threshold Voltage(V) 600 700 800 900 1000 -50 -25 0 25 50 75 100 Temperature(C) Lx Limit Current(mA) 14) Nch Transistor On Resistance vs. Temperature 15) Pch Transistor On Resistance vs. Temperature 0.1 0.2 0.3 0.4 0.5 0.6 -50 -25 0 25 50 75 100 Temperature(C) NchTr. ON Resistance(Ω) 0.1 0.2 0.3 0.4 0.5 0.6 -50 -25 0 25 50 75 100 Temperature(C) PchTr. ON Resistance(Ω)

16) Turn-on Waveform C IN=COUT=Ceramic10uF, L=4.7uH RP500X111A RP500X251A 0.2 0.4 0.6 0.8 1.2 1.4 0 100 200 300 400 Time(us) Output Voltage(V) 0.5 1.5 2.5 0 100 200 300 400 Time(us) Output Voltage(V) RP500X331A RP500X152A 0 100 200 300 400 Time(us) Output Voltage(V) 0.5 1.5 0 100 200 300 400 Time(us) Output Voltage(V) 17) Load Transient Response (Tr=Tf=1us) RP500X121X Vin=3.6V, Iout=0mA to 400mA 0.50 0.60 0.70 0.80 0.90 1.00 1.10 1.20 1.30 04 0 8 0 TIME[us] VOUT[V] 200 400 600 800 IOUT[mA]

RP500X121A C IN=COUT=Ceramic10uF, L=4.7uH,VIN=3.6V IOUT= 0 m A t o 2 0 0 m A I OUT=200mA to 0mA 1.00 1.05 1.10 1.15 1.20 1.25 0 2 04 06 08 0 1 0 0 Time(us) Output Voltage(V) 200 400 600 800 1000 Output Current(mA) Output Voltage Output Current 1.05 1.10 1.15 1.20 1.25 1.30 0 200 400 600 800 1000 Time(us) Output Voltage(V) 200 400 600 800 1000 Output Current(mA) Output Voltage Output Current R P 5 0 0 X 1 2 1 A C IN=COUT=Ceramic10uF, L=4.7uH,VIN=3.6V IOUT= 1 0 0 m A t o 4 0 0 m A I OUT=400mA to 100mA 1.00 1.05 1.10 1.15 1.20 1.25 0 2 04 06 08 0 1 0 0 Time(us) Output Voltage(V) 200 400 600 800 1000 Output Current(mA)Output Voltage Output Current 1.05 1.10 1.15 1.20 1.25 1.30 0 2 04 06 08 0 1 0 0 Time(us) Output Voltage(V) 200 400 600 800 1000 Output Current(mA) Output Voltage Output Current RP500X251X Vin=5V, Iout=0 to 50mA RP500X251X Vin=5V, Iout=50mA to 0mA RP500K251A 1.80 1.90 2.00 2.10 2.20 2.30 2.40 2.50 2.60 0 40 80 120 160 200 240 280 320 360 400 TIME[us] VOUT[V] 200 400 600 800 IOUT[mA] VOUT[V] IOUT[mA] RP500K251A 1.90 2.00 2.10 2.20 2.30 2.40 2.50 2.60 2.70 0 40 80 120 160 200 240 280 320 360 400 TIME[us] VOUT[V] 200 400 600 800 IOUT[mA] VOUT[V] IOUT[mA]

RP500X251X Vin=5V, Iout=0 to 200mA RP500X251X Vin=5V, Iout=200mA to 0mA R P 5 0 0 X 2 5 1 A C IN=COUT=Ceramic10uF, L=4.7uH,VIN=5.0 V IOUT= 0 m A t o 2 0 0 m A I OUT=200mA to 0mA 2.30 2.35 2.40 2.45 2.50 2.55 2.60 0 2 04 06 08 0 1 0 0 Time(us) Output Voltage(V) 200 400 600 800 1000 Output Current(mA) Output Voltage Output Current 2.30 2.35 2.40 2.45 2.50 2.55 2.60 0 200 400 600 800 1000 Time(us) Output Voltage(V) 200 400 600 800 1000 Output Current(mA) Output Voltage Output Current R P 5 0 0 X 2 5 1 A C IN=COUT=Ceramic10uF, L=4.7uH,VIN=5.0 V IOUT= 1 0 0 m A t o 4 0 0 m A I OUT=400mA to 100mA 2.30 2.35 2.40 2.45 2.50 2.55 2.60 0 2 04 06 08 0 1 0 0 Time(us) Output Voltage(V) 200 400 600 800 1000 Output Current(mA) Output Voltage Output Current 2.30 2.35 2.40 2.45 2.50 2.55 2.60 0 2 04 06 08 0 1 0 0 Time(us) Output Voltage(V) 200 400 600 800 1000 Output Current(mA) Output Voltage Output Current 1.80 1.90 2.00 2.10 2.20 2.30 2.40 2.50 2.60 04 0 8 0 TIME[us] VOUT[V] 200 400 600 800 IOUT[mA] VOUT[V] IOUT[mA] 1.80 1.90 2.00 2.10 2.20 2.30 2.40 2.50 2.60 0 40 80 120 160 200 240 280 320 360 400 TIME[us] VOUT[V] 200 400 600 800 IOUT[mA] VOUT[V] IOUT[mA]

RP500X331X Vin=5V, Iout=0mA to 50mA RP500X331X Vin=5V, Iout=50mA to 0mA RP500X331A C IN=COUT=Ceramic10uF, L=4.7uH,VIN=5.0 V IOUT=0mA to 200mA I OUT=200mA to 0mA 3.10 3.15 3.20 3.25 3.30 3.35 3.40 0 200 400 600 800 1000 Time(us) Output Voltage(V) 200 400 600 800 1000 Output Current(mA) Output Voltage Output Current RP500X331A C IN=COUT=Ceramic10uF, L=4.7uH,VIN=5.0 V IOUT= 1 0 0 m A t o 4 0 0 m A I OUT=400mA to 100mA 3.10 3.15 3.20 3.25 3.30 3.35 3.40 0 2 04 06 08 0 1 0 0 Time(us) Output Voltage(V) 200 400 600 800 1000 Output Current(mA) Output Voltage Output Current 3.10 3.15 3.20 3.25 3.30 3.35 3.40 0 2 04 06 08 0 1 0 0 Time(us) Output Voltage(V) 200 400 600 800 1000 Output Current(mA) Output Voltage Output Current 2.60 2.70 2.80 2.90 3.00 3.10 3.20 3.30 3.40 0 40 80 120 160 200 240 280 320 360 400 TIME[us] VOUT[V] 100 150 200 250 300 350 400 IOUT[mA] VOUT[V] IOUT[mA] 2.60 2.70 2.80 2.90 3.00 3.10 3.20 3.30 3.40 0 40 80 120 160 200 240 280 320 360 400 TIME[us] VOUT[V] 100 150 200 250 300 350 400 IOUT[mA] VOUT[V] IOUT[mA] 3.10 3.15 3.20 3.25 3.30 3.35 3.40 0 2 04 06 08 0 1 0 0 Time(us) Output Voltege(V) 200 400 600 800 1000 Output Current(mA) Output Voltage Output Current

RP500X152A C IN=COUT=Ceramic10uF, L=4.7uH,VIN=3.6V IOUT= 0 m A t o 2 0 0 m A I OUT=200mA to 0mA 1.30 1.35 1.40 1.45 1.50 1.55 1.60 0 2 04 06 08 0 1 0 0 Time(us) Output Voltage(V) 200 400 600 800 1000 Output Current(mA) Output Voltage Output Current 1.30 1.35 1.40 1.45 1.50 1.55 1.60 0 40 80 120 160 200 Time(us) Output Voltage(V) 200 400 600 800 1000 Output Current(mA) Output Voltage Output Current RP500X152A C IN=COUT=Ceramic10uF, L=4.7uH,VIN=3.6V IOUT= 1 0 0 m A t o 4 0 0 m A I OUT=400mA to 100mA 1.30 1.35 1.40 1.45 1.50 1.55 1.60 0 2 04 06 08 0 1 0 0 Time(us) Output Voltage(V) 200 400 600 800 1000 Output Current(mA)Output Voltage Output Current 1.30 1.35 1.40 1.45 1.50 1.55 1.60 0 2 04 06 08 0 1 0 0 Time(us) Output Voltage(V) 200 400 600 800 1000 Output Current(mA) Output Voltage Output Current

CIN 10 µF (Ceramic) COUT 10µF (for 1.2MHz type) L 4.7µH (for 1.2MHz type) COUT CE AGND VIN Lx Vout VIN CIN L Load P G N D RP500 Series