*RP105Q
(SC-88A) is the discontinued product as of June, 2016.
RP105x Series
Low Voltage 400 mA LDO Regulator
NO.EA-179-160420
OUTLINE
The RP105x is a 400 mA output type CMOS-based voltage regulator with capability of low input voltage
(Min. 0.9 V) and low output voltage (Min. 0.6 V). This device is remarkably improved the performance at low
input voltage compared with conventional low voltage LDOs, and two power supply voltage type. (Another
power source, V
BIAS
pin voltage must be Min. 2.4 V). The device consists of a voltage reference unit, an error
amplifier, resistor-net for voltage setting, a current limit circuit to avoid the destruction, a UVLO circuit with
monitoring input voltage, and so on.
The RP105x has the ultra-low on resistance output driver, the on resistance is Typ. 0.4
Ω
(V
OUT
= 0.8 V, I
OUT
= 300 mA). The built-in driver is Nch MOSFET, thus the load transient response is excellent, (under the
condition of the current between 1 mA and 400 mA, tr = 0.5
µs,
the undershoot level is approximately 50 mV).
The output voltage of this device is fixed with high accuracy. Since the packages for the device are
DFN(PLP)1212-6, DFN1212-5, SOT-23-5 and SC-88A therefore high density mounting of the IC on boards is
possible.
FEATURES
●
Supply Current ......................................................... Typ. 28
µA
●
Standby Current ....................................................... Typ. 0.1
µA
●
Ripple Rejection ....................................................... Typ. 80 dB (f = 1 kHz, V
IN
Ripple)
··········································································· .
Typ. 50 dB (f = 1 kHz, V
BIAS
Ripple)
●
Output Voltage Range .............................................. 0.6 V to 1.5 V (0.1 V step)
Contact Ricoh sales representatives for other voltages.
Input Voltage Range (V
BIAS
) ..................................... 2.4 V to 5.25 V (V
OUT
< 0.8 V)
······································································
Set V
OUT
+ 1.6 V to 5.25 V (V
OUT
≥ 0.8 V)
●
Input Voltage Range (V
IN
) ........................................ RP105xxxxB/D: 0.9 V to V
BIAS
(V
OUT
< 0.8 V)
Set V
OUT
+ 0.1 V to V
BIAS
(V
OUT
≥ 0.8 V)
RP105xxxxE/F: 0.9 V to V
BIAS
●
Output Voltage Accuracy.......................................... Typ.
±15
mV (Ta = 25°C)
●
Temperature-Drift Coefficient of Output Voltage ...... Typ.
±50
ppm/°C
●
Dropout Voltage ....................................................... DFN1212-5: Typ. 105 mV
(I
OUT
= 400 mA, V
OUT
= 1.5 V, V
BIAS
= 3.6 V)
●
Line Regulation ........................................................ Typ. 0.02%/V
●
Packages ................................................................. DFN(PLP)1212-6, SC-88A, SOT-23-5, DFN1212-5
●
Built-in Fold Back Protection Circuit ........................ Typ. 120 mA (Current at short mode)
●
Ceramic capacitors are recommended .................... C
BIAS
= C
IN
= 1.0
µF
or more, C
OUT
= 2.2
µF
or more
●
APPLICATIONS
●
●
●
Power source for battery-powered equipment.
Power source for electrical appliances such as cameras, VCRs and camcorders.
Power source for portable communication equipment.
1
*RP105Q
(SC-88A) is the discontinued product as of June, 2016.
NO.EA-179-160420
BLOCK DIAGRAMS
RP105xxxxB/E
V
BIAS
V
IN
V
BIAS
V
OUT
V
IN
V
OUT
RP105xxxxD/F
UVLO
Vref
Current Limit
UVLO
Vref
Current Limit
CE
GND CE
GND
SELECTION GUIDE
The output voltage, the UVLO circuit, the auto-discharge function
(1)
, the package, and the taping type for the
device are user-selectable options.
Product Name
RP105Kxx1∗-TR
RP105Qxx2∗-TR-FE
(2)
RP105Nxx1∗-TR-FE
RP105Lxx1∗-TR
Package
DFN(PLP)1212-6
SC-88A
SOT-23-5
DFN1212-5
Quantity per Reel
5,000 pcs
3,000 pcs
3,000 pcs
5,000 pcs
Pb Free
Yes
Yes
Yes
Yes
Halogen Free
Yes
Yes
Yes
Yes
xx : The set output voltage (V
SET
) can be designated within the range of
0.6 V (06) to 1.5 V (15) in 0.1 V step.
If the set output voltage (V
SET
) is designated in 0.01 V step, indicate the product name as follows.
1.05 V: RP105x10x∗5-TR
∗
: CE pin polarity and auto-discharge function of the product can be defined as follows.
(B) "H" active, auto-discharge function is not included, UVLO is included
(D) "H" active, auto-discharge function is included, UVLO is included
(E) "H" active, auto-discharge function is not included, UVLO is not included
(F) "H" active, auto-discharge function is included, UVLO is not included
(1)
Auto-discharge function quickly lowers the output voltage to 0 V, when the chip enable signal is switched from the
active mode to the standby mode, by releasing the electrical charge accumulated in the external capacitor.
(2)
RP105Qxx2∗-TR-FE supports only RP105Qxx2B/D.
2
*RP105Q
(SC-88A) is the discontinued product as of June, 2016.
NO.EA-179-160420
ABSOLUTE MAXIMUM RATINGS
Symbol
V
BIAS
V
IN
V
CE
V
OUT
I
OUT
Input Voltage
Input Voltage (for Driver)
Input Voltage (CE Pin)
Output Voltage
Output Current
DFN(PLP)1212-6
P
D
Power Dissipation
(Standard Test Land Pattern)
(1)
Operating Temperature
Storage Temperature
SC-88A
SOT-23-5
DFN1212-5
Ta
Tstg
Item
Rating
6.0
−0.3 to V
BIAS
+ 0.3
6.0
−0.3 to V
IN
+ 0.3
500
400
380
420
650
−40 to 85
−55 to 125
°C
°C
mW
Unit
V
V
V
V
mA
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.
(1)
Refer to
POWER DISSIPATION
for detailed information.
5
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