RICOH R1215D Technical data
R1215D SERIES
STEP-UP DC/DC CONTOLLER
NO.EA-134-111123
OUTLINE
The R1215D Series are CMOS-based PWM step-up DC/DC converter controllers with low supply current. Each of the R1215D Series consists of an oscillator, a PWM comparator circuit, a reference voltage unit, an
error amplifier, a reference current unit, a protection circuit, and an under voltage lockout (UVLO) circuit. A low ripple, high efficiency step-up DC/DC converter can be composed of this IC with some external components, or an inductor, a diode, a power MOSFET, resisters, and capacitors.
Maximum duty cycle and the soft start time are easily adjustable with external resistors and capacitors. As for the protection circuit, after the soft-starting time, if the maximum duty cycle is continued for a certain period, the R1215D Series latch the external driver with its off state, or the latch-type protection circuit works.
The delay time for latch the state can be set with an external capacitor.
To release the protection circuit, restart with power-on (Voltage supplier is equal or less than UVLO detector threshold level).
FEATURES
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Input Voltage Range ....................................................... |
1.8V to 5.5V |
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Two Options of Basic Oscillator Frequency .................... |
Typ.700kHz, 1.4MHz |
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Built-in Latch-type Protection Function (Output Delay Time can be set with an external capacitor) |
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Maximum Duty Cycle/Soft-start time ............................. |
Adjustable with external capacitors |
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High Reference Voltage Accuracy .................................. |
±1.5% |
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UVLO Threshold level..................................................... |
Typ.1.6V/1.79V by mask option |
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Small Temperature Coefficient of Reference Voltage |
...Typ.±150ppm/°C |
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Package .......................................................................... |
SON-8 ( t = Max. 0.9mm ) |
APPLICATIONS
•Constant Voltage Power Source for portable equipment.
•Constant Voltage Power Source for LCD and CCD.
1
R1215D
BLOCK DIAGRAM
Internal VR |
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VIN |
VREFOUT |
VREFOUT |
UVLO |
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Oscillator |
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DTC |
EXT |
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PWM Comp |
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Latch |
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VFB |
VREF |
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Er.Amp |
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AMPOUT |
GND |
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DELAY
SELECTION GUIDE
In the R1215D Series, the oscillator frequency and UVLO detector threshold can be selected at the user's request.
Product Name |
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Package |
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Quantity per Reel |
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Pb Free |
Halogen Free |
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R1215D002x-TR-F |
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SON-8 |
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3,000 pcs |
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x Desiguation of Oscillator Frequency and Detector Threshold |
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Code |
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Oscillator Frequency |
UVLO Detector Threshold |
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A |
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TYP. 700kHz |
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TYP. 1.79V |
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B |
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TYP. 1.4MHz |
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TYP. 1.79V |
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E |
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TYP. 700kHz |
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TYP. 1.60V |
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F |
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TYP. 1.4MHz |
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TYP. 1.60V |
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2
R1215D
PIN CONFIGURATION
SON-8
Top View |
Bottom View |
8 |
7 |
6 |
5 |
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5 |
6 |
7 |
8 |
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1 |
2 |
3 |
4 |
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4 |
3 |
2 |
1 |
PIN DESCRIPTION
Pin No |
Symbol |
Description |
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1 |
EXT |
External FET Drive Pin (CMOS Output) |
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2 |
GND |
Ground Pin |
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3 |
DTC |
Pin for Setting Maximum Duty Cycle and Soft start time |
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4 |
DELAY |
Pin for External Capacitor |
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(for Setting Output Delay of Protection) |
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5 |
VFB |
Feedback Pin for monitoring Output Voltage |
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6 |
VREFOUT |
Reference Voltage Output Pin |
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7 |
AMPOUT |
Amplifier Output Pin |
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8 |
VIN |
Power Supply Pin for the IC |
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Tab suspension leads in the |
parts have GND level. (They are connected to the reverse side of this IC.) |
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Do not connect to other wires or land patterns.
ABSOLUTE MAXIMUM RATINGS
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(GND=0V) |
Symbol |
Item |
Rating |
Unit |
VIN |
VIN Pin Voltage |
6.5 |
V |
VEXT |
EXT Pin Output Voltage |
−0.3 to VIN+0.3 |
V |
VDLY |
DELAY Pin Voltage |
−0.3 to VIN+0.3 |
V |
VREFOUT |
VREFOUT Pin Voltage |
−0.3 to VIN+0.3 |
V |
VAMP |
AMPOUT Pin Voltage |
−0.3 to VIN+0.3 |
V |
VDTC |
DTC Pin Voltage |
−0.3 to VIN+0.3 |
V |
VFB |
VFB Pin Voltage |
−0.3 to VIN+0.3 |
V |
IAMP |
AMPOUT Pin Current |
±10 |
mA |
IROUT |
VREFOUT Pin Current |
30 |
mA |
IEXT |
EXT Pin Inductor Drive Output Current |
±80 |
mA |
PD |
Power Dissipation |
480 |
mW |
Topt |
Operating Temperature Range |
−40 to +85 |
°C |
Tstg |
Storage Temperature Range |
−55 to +125 |
°C |
1 For Power Dissipation, please refer to PACKAGE INFORMATION to be described.
3
R1215D
ELECTRICAL CHARACTERISTICS
• R1215D002A |
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Topt=25°C |
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Symbol |
Item |
Conditions |
Min. |
Typ. |
Max. |
Unit |
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VIN |
Operating Input Voltage |
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2.0 |
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5.5 |
V |
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VFB |
VFB Voltage Tolerance |
VIN=2.5V |
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0.985 |
1.000 |
1.015 |
V |
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VFB/ |
VIN |
VFB Voltage Line Regulation |
VIN: from 2.0V to 5.5V |
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3 |
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mV |
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VFB/ |
Topt |
VFB Voltage Temperature |
< |
< |
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±150 |
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ppm/ |
Coefficient |
−40°C = Topt = 85°C |
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°C |
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IFB |
VFB Input Current |
VIN=5.5V, VFB=0V or 5.5V |
−0.1 |
0 |
0.1 |
μA |
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AV |
Open Loop Voltage Gain |
VIN=2.5V |
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100 |
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dB |
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fT |
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Unity Gain Frequency Band |
VIN=2.5V, AV=0 |
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1.0 |
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MHz |
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fosc |
Oscillator Frequency |
VIN=2.5V, VDLY=VFB=0V |
595 |
700 |
805 |
kHz |
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fosc/ |
VIN |
Oscillator Frequency Line |
VIN: from 2.0V to 5.5V |
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50 |
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kHz |
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Regulation |
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Oscillator Frequency |
< |
< |
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±0.3 |
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kHz/ |
fosc/ |
Topt |
Temperature Coefficient |
−40°C = Topt |
= 85°C |
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°C |
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IDD1 |
Supply Current 1 |
VIN=5.5V, VDLY=VFB=0V |
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600 |
1000 |
μA |
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VREFOUT |
VREFOUT Voltage |
VIN=2.5V,IROUT=1mA |
1.280 |
1.300 |
1.320 |
V |
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IOUT |
VREFOUT Maximum Output |
VIN=2.5V |
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10 |
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mA |
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Current |
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VREFOUT/ |
VREFOUT Line Regulation |
VIN: from 2.0V to 5.5V |
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5 |
10 |
mV |
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VIN |
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VREFOUT/ |
VREFOUT Load Regulation |
VIN=2.5V, |
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6 |
20 |
mV |
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IROUT |
IROUT: from 0.1mA to 5.0mA |
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ILIM |
VREFOUT Short Current Limit |
VIN=2.5V, VREFOUT=0V |
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15 |
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mA |
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VREFOUT/ |
VREFOUT Voltage Temperature |
< |
< |
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±150 |
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ppm/ |
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Topt |
Coefficient |
−40°C = Topt |
= 85°C |
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°C |
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REXTH |
EXT "H" ON Resistance |
VIN=2.5V, IEXT=−50mA |
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2.8 |
6.0 |
Ω |
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REXTL |
EXT "L" ON Resistance |
VIN=2.5V, IEXT=50mA |
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1.8 |
4.0 |
Ω |
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tr |
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EXT Rising Time |
VIN=2.5V, CEXT=1000pF |
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12 |
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ns |
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tf |
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EXT Falling Time |
VIN=2.5V, CEXT=1000pF |
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8 |
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ns |
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IDLY1 |
DELAY Pin Charge Current |
VIN=2.5V, VDLY=VFB=0V |
3.0 |
6.0 |
8.5 |
μA |
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IDLY2 |
DELAY Pin Discharge Current |
VIN=VFB=2.0V, VDLY=0.1V |
0.08 |
0.20 |
0.36 |
mA |
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VDLY |
DELAY Pin Detector Threshold |
VIN=2.5V, VFB=0V, VDLY=0V to 2V |
0.95 |
1.00 |
1.05 |
V |
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VUVLO1 |
UVLO Detector Threshold |
VIN=2.5V to 0V, VDLY=VFB=0V |
1.70 |
1.79 |
1.88 |
V |
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VUVLO2 |
UVLO Released Voltage |
VIN=0V to 2.5V, VDLY=VFB=0V |
1.78 |
1.88 |
1.98 |
V |
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VHYS |
UVLO Hysteresis Range |
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0.04 |
0.09 |
0.14 |
V |
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VDTC0 |
Duty=0% DTC Pin Voltage |
VIN=2.5V |
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0.28 |
0.38 |
0.48 |
V |
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VDTC20 |
Duty=20% DTC Pin Voltage |
VIN=2.5V |
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0.48 |
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V |
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VDTC80 |
Duty=80% DTC Pin Voltage |
VIN=2.5V |
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0.92 |
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V |
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VDTC100 |
Duty=100% DTC Pin Voltage |
VIN=2.5V |
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0.92 |
1.02 |
1.12 |
V |
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IAMPH |
AMP "H" Output Current |
VIN=2.5V, VAMP=1.0V, VFB=0.9V |
1.6 |
3.2 |
5.8 |
mA |
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IAMPL |
AMP "L" Output Current |
VIN=2.5V, VAMP=1.0V, VFB=1.1V |
40 |
85 |
130 |
μA |
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4
R1215D
• R1215D002B |
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Topt=25°C |
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Symbol |
Item |
Conditions |
Min. |
Typ. |
Max. |
Unit |
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VIN |
Operating Input Voltage |
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2.0 |
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5.5 |
V |
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VFB |
VFB Voltage Tolerance |
VIN=2.5V |
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0.985 |
1.000 |
1.015 |
V |
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VFB/ |
VIN |
VFB Voltage Line Regulation |
VIN: from 2.0V to 5.5V |
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3 |
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mV |
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VFB/ |
Topt |
VFB Voltage Temperature |
< |
< |
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±150 |
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ppm/ |
Coefficient |
−40°C = Topt = 85°C |
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°C |
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IFB |
VFB Input Current |
VIN=5.5V, VFB=0V or 5.5V |
−0.1 |
0 |
0.1 |
μA |
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AV |
Open Loop Voltage Gain |
VIN=2.5V |
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100 |
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dB |
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fT |
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Unity Gain Frequency Band |
VIN=2.5V, AV=0 |
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1.0 |
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MHz |
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fosc |
Oscillator Frequency |
VIN=2.5V, VDLY=VFB=0V |
1.190 |
1.400 |
1.610 |
MHz |
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fosc/ |
VIN |
Oscillator Frequency Line |
VIN: from 2.0V to 5.5V |
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100 |
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kHz |
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Regulation |
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Oscillator Frequency |
< |
< |
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±0.6 |
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kHz/ |
fosc/ |
Topt |
Temperature Coefficient |
−40°C = Topt |
= 85°C |
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°C |
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IDD1 |
Supply Current 1 |
VIN=5.5V, VDLY=VFB=0V |
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900 |
1800 |
μA |
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VREFOUT |
VREFOUT Voltage |
VIN=2.5V,IROUT=1mA |
1.280 |
1.300 |
1.320 |
V |
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IOUT |
VREFOUT Maximum Output |
VIN=2.5V |
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10 |
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mA |
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Current |
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VREFOUT/ |
VREFOUT Line Regulation |
VIN: from 2.0V to 5.5V |
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5 |
10 |
mV |
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VIN |
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VREFOUT/ |
VREFOUT Load Regulation |
VIN=2.5V, |
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6 |
20 |
mV |
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IROUT |
IROUT: from 0.1mA to 5.0mA |
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ILIM |
VREFOUT Short Current Limit |
VIN=2.5V, VREFOUT=0V |
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15 |
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mA |
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VREFOUT/ |
VREFOUT Voltage Temperature |
< |
< |
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±150 |
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ppm/ |
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Topt |
Coefficient |
−40°C = Topt |
= 85°C |
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°C |
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REXTH |
EXT "H" ON Resistance |
VIN=2.5V, IEXT=−50mA |
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2.8 |
6.0 |
Ω |
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REXTL |
EXT "L" ON Resistance |
VIN=2.5V, IEXT=50mA |
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1.8 |
4.0 |
Ω |
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tr |
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EXT Rising Time |
VIN=2.5V, CEXT=1000pF |
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12 |
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ns |
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tf |
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EXT Falling Time |
VIN=2.5V, CEXT=1000pF |
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8 |
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ns |
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IDLY1 |
DELAY Pin Charge Current |
VIN=2.5V, VDLY=VFB=0V |
3.0 |
6.0 |
8.5 |
μA |
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IDLY2 |
DELAY Pin Discharge Current |
VIN=VFB=2.0V, VDLY=0.1V |
0.08 |
0.20 |
0.36 |
mA |
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VDLY |
DELAY Pin Detector Threshold |
VIN=2.5V, VFB=0V, VDLY=0V to 2V |
0.95 |
1.00 |
1.05 |
V |
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VUVLO1 |
UVLO Detector Threshold |
VIN=2.5V to 0V, VDLY=VFB=0V |
1.70 |
1.79 |
1.88 |
V |
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VUVLO2 |
UVLO Released Voltage |
VIN=0V to 2.5V, VDLY=VFB=0V |
1.78 |
1.88 |
1.98 |
V |
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VHYS |
UVLO Hysteresis Range |
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0.04 |
0.09 |
0.14 |
V |
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VDTC0 |
Duty=0% DTC Pin Voltage |
VIN=2.5V |
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0.28 |
0.38 |
0.48 |
V |
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VDTC20 |
Duty=20% DTC Pin Voltage |
VIN=2.5V |
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0.47 |
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V |
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VDTC80 |
Duty=80% DTC Pin Voltage |
VIN=2.5V |
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0.93 |
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V |
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VDTC100 |
Duty=100% DTC Pin Voltage |
VIN=2.5V |
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0.92 |
1.02 |
1.12 |
V |
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IAMPH |
AMP "H" Output Current |
VIN=2.5V, VAMP=1.0V, VFB=0.9V |
1.6 |
3.2 |
5.8 |
mA |
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IAMPL |
AMP "L" Output Current |
VIN=2.5V, VAMP=1.0V, VFB=1.1V |
40 |
85 |
130 |
μA |
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5
R1215D
• R1215D002E |
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Topt=25°C |
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Symbol |
Item |
Conditions |
Min. |
Typ. |
Max. |
Unit |
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VIN |
Operating Input Voltage |
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1.8 |
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5.5 |
V |
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VFB |
VFB Voltage Tolerance |
VIN=2.5V |
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0.985 |
1.000 |
1.015 |
V |
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VFB/ |
VIN |
VFB Voltage Line Regulation |
VIN: from 1.8 V to 5.5V |
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3 |
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mV |
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VFB/ |
Topt |
VFB Voltage Temperature |
< |
< |
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±150 |
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ppm/ |
Coefficient |
−40°C = Topt = 85°C |
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°C |
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IFB |
VFB Input Current |
VIN=5.5V, VFB=0V or 5.5V |
−0.1 |
0 |
0.1 |
μA |
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AV |
Open Loop Voltage Gain |
VIN=2.5V |
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100 |
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dB |
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fT |
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Unity Gain Frequency Band |
VIN=2.5V, AV=0 |
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1.0 |
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MHz |
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fosc |
Oscillator Frequency |
VIN=2.5V, VDLY=VFB=0V |
595 |
700 |
805 |
kHz |
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fosc/ |
VIN |
Oscillator Frequency Line |
VIN: from 1.8V to 5.5V |
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50 |
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kHz |
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Regulation |
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Oscillator Frequency |
< |
< |
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±0.3 |
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kHz/ |
fosc/ |
Topt |
Temperature Coefficient |
−40°C = Topt |
= 85°C |
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°C |
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IDD1 |
Supply Current 1 |
VIN=5.5V, VDLY=VFB=0V |
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600 |
1000 |
μA |
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VREFOUT |
VREFOUT Voltage |
VIN=2.5V,IROUT=1mA |
1.280 |
1.300 |
1.320 |
V |
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IOUT |
VREFOUT Maximum Output |
VIN=2.5V |
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10 |
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mA |
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Current |
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VREFOUT/ |
VREFOUT Line Regulation |
VIN: from 1.8V to 5.5V |
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5 |
10 |
mV |
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VIN |
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VREFOUT/ |
VREFOUT Load Regulation |
VIN=2.5V, |
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6 |
20 |
mV |
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IROUT |
IROUT: from 0.1mA to 5.0mA |
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ILIM |
VREFOUT Short Current Limit |
VIN=2.5V, VREFOUT=0V |
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15 |
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mA |
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VREFOUT/ |
VREFOUT Voltage Temperature |
< |
< |
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±150 |
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ppm/ |
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Topt |
Coefficient |
−40°C = Topt |
= 85°C |
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°C |
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REXTH |
EXT "H" ON Resistance |
VIN=2.5V, IEXT=−50mA |
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2.8 |
6.0 |
Ω |
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REXTL |
EXT "L" ON Resistance |
VIN=2.5V, IEXT=50mA |
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1.8 |
4.0 |
Ω |
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tr |
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EXT Rising Time |
VIN=2.5V, CEXT=1000pF |
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12 |
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ns |
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tf |
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EXT Falling Time |
VIN=2.5V, CEXT=1000pF |
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8 |
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ns |
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IDLY1 |
DELAY Pin Charge Current |
VIN=2.5V, VDLY=VFB=0V |
3.0 |
6.0 |
8.5 |
μA |
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IDLY2 |
DELAY Pin Discharge Current |
VIN=VFB=1.8V, VDLY=0.1V |
0.08 |
0.18 |
0.36 |
mA |
||
VDLY |
DELAY Pin Detector Threshold |
VIN=2.5V, VFB=0V, VDLY=0V to 2V |
0.95 |
1.00 |
1.05 |
V |
||
VUVLO1 |
UVLO Detector Threshold |
VIN=2.5V to 0V, VDLY=VFB=0V |
1.50 |
1.60 |
1.70 |
V |
||
VUVLO2 |
UVLO Released Voltage |
VIN=0V to 2.5V, VDLY=VFB=0V |
1.56 |
1.67 |
1.78 |
V |
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VHYS |
UVLO Hysteresis Range |
|
|
0.03 |
0.07 |
0.11 |
V |
|
VDTC0 |
Duty=0% DTC Pin Voltage |
VIN=2.5V |
|
0.28 |
0.38 |
0.48 |
V |
|
VDTC20 |
Duty=20% DTC Pin Voltage |
VIN=2.5V |
|
|
0.48 |
|
V |
|
VDTC80 |
Duty=80% DTC Pin Voltage |
VIN=2.5V |
|
|
0.92 |
|
V |
|
VDTC100 |
Duty=100% DTC Pin Voltage |
VIN=2.5V |
|
0.92 |
1.02 |
1.12 |
V |
|
IAMPH |
AMP "H" Output Current |
VIN=2.5V, VAMP=1.0V, VFB=0.9V |
1.6 |
3.2 |
5.8 |
mA |
||
IAMPL |
AMP "L" Output Current |
VIN=2.5V, VAMP=1.0V, VFB=1.1V |
40 |
85 |
130 |
μA |
||
6
R1215D
• R1215D002F |
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Topt=25°C |
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Symbol |
Item |
Conditions |
Min. |
Typ. |
Max. |
Unit |
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VIN |
Operating Input Voltage |
|
|
1.8 |
|
5.5 |
V |
|
VFB |
VFB Voltage Tolerance |
VIN=2.5V |
|
0.985 |
1.000 |
1.015 |
V |
|
VFB/ |
VIN |
VFB Voltage Line Regulation |
VIN: from 1.8V to 5.5V |
|
3 |
|
mV |
|
VFB/ |
Topt |
VFB Voltage Temperature |
< |
< |
|
±150 |
|
ppm/ |
Coefficient |
−40°C = Topt = 85°C |
|
|
°C |
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IFB |
VFB Input Current |
VIN=5.5V, VFB=0V or 5.5V |
−0.1 |
0 |
0.1 |
μA |
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AV |
Open Loop Voltage Gain |
VIN=2.5V |
|
|
100 |
|
dB |
|
fT |
|
Unity Gain Frequency Band |
VIN=2.5V, AV=0 |
|
1.0 |
|
MHz |
|
fosc |
Oscillator Frequency |
VIN=2.5V, VDLY=VFB=0V |
1.190 |
1.400 |
1.610 |
MHz |
||
fosc/ |
VIN |
Oscillator Frequency Line |
VIN: from 1.8V to 5.5V |
|
100 |
|
KHz |
|
Regulation |
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|
Oscillator Frequency |
< |
< |
|
±0.6 |
|
KHz/ |
fosc/ |
Topt |
Temperature Coefficient |
−40°C = Topt |
= 85°C |
|
|
°C |
|
IDD1 |
Supply Current 1 |
VIN=5.5V, VDLY=VFB=0V |
|
900 |
1800 |
μA |
||
VREFOUT |
VREFOUT Voltage |
VIN=2.5V,IROUT=1mA |
1.280 |
1.300 |
1.320 |
V |
||
IOUT |
VREFOUT Maximum Output |
VIN=2.5V |
|
10 |
|
|
mA |
|
Current |
|
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|
VREFOUT/ |
VREFOUT Line Regulation |
VIN: from 1.8V to 5.5V |
|
5 |
10 |
mV |
||
VIN |
|
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VREFOUT/ |
VREFOUT Load Regulation |
VIN=2.5V, |
|
|
6 |
20 |
mV |
|
IROUT |
IROUT: from 0.1mA to 5.0mA |
|
||||||
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|
|
|
|
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ILIM |
VREFOUT Short Current Limit |
VIN=2.5V, VREFOUT=0V |
|
15 |
|
mA |
||
VREFOUT/ |
VREFOUT Voltage Temperature |
< |
< |
|
±150 |
|
ppm/ |
|
Topt |
Coefficient |
−40°C = Topt |
= 85°C |
|
|
°C |
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|
|
|
|
||||
REXTH |
EXT "H" ON Resistance |
VIN=2.5V, IEXT=−50mA |
|
2.8 |
6.0 |
Ω |
||
REXTL |
EXT "L" ON Resistance |
VIN=2.5V, IEXT=50mA |
|
1.8 |
4.0 |
Ω |
||
tr |
|
EXT Rising Time |
VIN=2.5V, CEXT=1000pF |
|
12 |
|
ns |
|
tf |
|
EXT Falling Time |
VIN=2.5V, CEXT=1000pF |
|
8 |
|
ns |
|
IDLY1 |
DELAY Pin Charge Current |
VIN=2.5V, VDLY=VFB=0V |
3.0 |
6.0 |
8.5 |
μA |
||
IDLY2 |
DELAY Pin Discharge Current |
VIN=VFB=1.8V, VDLY=0.1V |
0.08 |
0.18 |
0.36 |
mA |
||
VDLY |
DELAY Pin Detector Threshold |
VIN=2.5V, VFB=0V, VDLY=0V to 2V |
0.95 |
1.00 |
1.05 |
V |
||
VUVLO1 |
UVLO Detector Threshold |
VIN=2.5V to 0V, VDLY=VFB=0V |
1.50 |
1.60 |
1.70 |
V |
||
VUVLO2 |
UVLO Released Voltage |
VIN=0V to 2.5V, VDLY=VFB=0V |
1.56 |
1.67 |
1.78 |
V |
||
VHYS |
UVLO Hysteresis Range |
|
|
0.03 |
0.07 |
0.11 |
V |
|
VDTC0 |
Duty=0% DTC Pin Voltage |
VIN=2.5V |
|
0.28 |
0.38 |
0.48 |
V |
|
VDTC20 |
Duty=20% DTC Pin Voltage |
VIN=2.5V |
|
|
0.47 |
|
V |
|
VDTC80 |
Duty=80% DTC Pin Voltage |
VIN=2.5V |
|
|
0.93 |
|
V |
|
VDTC100 |
Duty=100% DTC Pin Voltage |
VIN=2.5V |
|
0.92 |
1.02 |
1.12 |
V |
|
IAMPH |
AMP "H" Output Current |
VIN=2.5V, VAMP=1.0V, VFB=0.9V |
1.6 |
3.2 |
5.8 |
mA |
||
IAMPL |
AMP "L" Output Current |
VIN=2.5V, VAMP=1.0V, VFB=1.1V |
40 |
85 |
130 |
μA |
||
7
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