RP132x Series
Low Voltage 1A LDO with Ext. V
OUT
Adjustable
The RP132x Series are CMOS-based LDO regulators featuring 1A output with low on-resistance. RP132x offers almost the same basic performances as the RP131x Series.
But RP132x offers an excellent load regulation. While the output voltage is internally set in the RP131x Series, the RP132x Series is available in two versions: fixed version
in which the output voltage is internally set and the adjusted version in which it is set with an external resistor. RP132x has an inrush current limit circuit that limits
approximately 500mA when the voltage regulator turns on. The E/F Version can set the inrush current limit time by connecting a capacitor with DELAY pin.
∗)
RP132H/S/J Series are suitable for automotive applications too. Please refer to our "Car Electronics Products Catalog" or contact us.
FEATURES
•
Supply Current (I
SS
) ························ Typ. 65μA (V
IN
=6.5V)
•
Standby Current (I
standby
) ················· Typ. 0.15μA (V
IN
=6.5V, CE="L")
•
Dropout Voltage (V
DIF
) ···················· Typ. 0.52V (I
OUT
=1A, V
SET
=2.8V)
•
Ripple Rejection (RR)····················· Typ. 70dB (f=1kHz, V
SET
≤
3.3V)
•
Input Voltage Range (V
IN
) ··············· 1.4V to 6.5V
•
Output Voltage Range (V
OUT
)·········· 0.8V to 5.5V (Internally fixed)
•
•
•
•
Load Regulation ····························· Typ. 3mV(I
OUT
=300mA)
•
Fold-back Protection Circuit ··········· Current limit Typ. 250mA
•
Inrush Current Limit Circuit ············ Typ.500mA (B/D: for 500μs after start-up)
•
Thermal Shutdown Circuit·············· Stops at 165°C.
•
Auto-discharge Function ················ D/F Version
•
Packages ······································· DFN (PLP)1820-6, SOT-89-5,
•
Ceramic capacitors can be used.··· 2.2μF or more (V
SET
≤
3.6V)
HSOP-6J, TO-252-5-P2
Typ. 5mV(I
OUT
=1A)
(E/F: The inrush current limit Time can be adjusted with an external capacitor.)
0.8V to 5.5V with external resistors (001)
(Feedback voltage : 0.8V)
Output Voltage Accuracy ················± 1%
Temp. coeff. of Output Voltage ······· Typ.
±
60ppm/°C
Line Regulation······························· Typ. 0.05%/V
(The above shows specification at Topt=25
°
C. Design assurance value at -40
°
C
≤
Topt
≤
85
°
C is also available. For details, please refer to the datasheet.)
BLOCK DIAGRAMS
RP132S/Hxx1x
(Internally fixed output voltage type)
V
DD
V
OUT
V
DD
RP132J/Kxx1x
(Internally fixed output voltage type)
V
OUT
V
FB
V
DD
RP132x001x
(Externally adjustable output voltage type)
V
OUT
V
FB
Vref
Vref
Current Limit
Thermal Shutdown
Vref
Current Limit
Thermal Shutdown
Current Limit
Thermal Shutdown
CE
DELAY
GND
CE
DELAY
GND
CE
DELAY
GND
DELAY pin: only RP132Sxx1E/F
DELAY pin: only RP132Kxx1E/F
DELAY pin: only RP132K0001E/F
SELECTION GUIDES
Halogen Free
Package
DFN(PLP)1820-6
SOT-89-5
HSOP-6J
TO-252-5-P2
Q'ty per Reel
5,000 pcs
1,000 pcs
1,000 pcs
3,000 pcs
Part No.
RP132K.xx.1.
∗
-TR
RP132H.xx.1.# -T1-FE
RP132S.xx.1.
∗
-E2-FE
RP132J.xx.1.# -T1-FE
TYPICAL APPLICATIONS
RP132J/Kxx1x
Internally fixed output voltage type
V
DD
C
IN
CE
V
OUT
V
FB
RP132x001x
Ext. adjustable output voltage type
V
DD
C
IN
CE
V
OUT
R1
C
OUT
R2
V
FB
GND
OUT
RP132x
C
OUT
OUT
RP132J/K
GND
.xx.
:Specify the output voltage within the range of 0.8V (.08.) to 5.5V (.55.)
in 0.1V steps. For the externally adjustable output voltage type (.00.).
.#.
:Select from (.B.) without auto-discharge function or
(.D.) with auto-discharge function.
:Select from (.B.) without auto-discharge function or
.∗
(.D.) with auto-discharge function,
(.E.) without auto-discharge function, with inrush current limit time adjustable pin,
(.F. ) with auto-discharge function, with inrush current limit time adjustable pin.
(RP132S001E/F is not available)
C
IN
: 2.2μF or more,
RP132K001E/F
C
OUT
: 2.2μF or more (V
SET
≤
3.6V)
Ext. adjustable output voltage with DELAY pin
4.7μF or more (V
SET
> 3.6V)
OUT
V
V
Please refer to the datasheet for
R1
RP132K
001E/F
details of the externally adjustable
C
C
V
R2
output voltage type.
DD
OUT
IN
OUT
FB
CE
GND
DELAY
PACKAGES (Top View)
DFN(PLP)1820-6
6
5
4
TYPICAL CHARACTERISTIC
TO-252-5-P2
∗
SOT-89-5
5
4
HSOP-6J
6
5
4
RP132x331x
0.8
Dropout Voltage vs. Output Current
85°C
25°C
- 40°C
∗
Dropout Voltage V
DIF
(V)
0.6
0.4
0.2
0
1
2
3
1
2
3
1
2
3
1
2
3
4
5
V
OUT
V
FB
GND
CE
NC or
5
DELAY
6 V
DD
1
2
3
4
1
2
3
4
5
CE or
GND
NC or
V
DD
V
OUT
1 V
OUT
2 GND
NC or
3
or DELAY
4 CE
5 GND
6 V
DD
1
2
3
4
5
CE
V
DD
GND
V
OUT
V
FB
0 100 200 300 400 500 600 700 800 900 1000
Output Current I
OUT
(mA)
∗
) The tab is substrate level (GND).
APPLICATIONS
•
Power source for hand-held communication equipment, cameras, and VCRs
•
Power source for home appliances
No.EK-265-121001
•
Power source for battery-powered equipment
CMOS LDO Regulator
RP132x Series
Low Voltage 1A LDO with Ext. V
OUT
Adjustable
Technical Information on Ricoh LDO Regulators
CMOS LDO Regulator
Adjustable Output Voltage Type
Adjustable Output Voltage Type Settings
The externally adjustable output voltage type can adjust the output voltage by using the external division resistance.
If the V
FB
voltage is described as set V
FB
, the output voltage can be set by using the following equations (set V
FB
:0.8V)
For better accuracy, choosing R1 (<<RIC) reduces this error.（RIC=Typ.1.3MΩ:(guaranteed by design), T
opt
=25°C）
The output voltage without the error-causing factor
V
OUT
= Set V
FB
x ((R1 + R2) / R2)
Notes
•
The V
OUT
pin of RP132x081x should be connected to the V
FB
pin.
•
RP132x081x can be adjusted the output voltage up to 5.5V.
•
Please use 16k
Ω
or less for R2 resistor.
V
OUT
R1
V
FB
R
IC
GND
I
IC
R2
I2
setV
FB
V
OUT
I1
Inrush Current Limit Time Adjustable Function
If you need to limit the inrush current completely in case of using the large output capacitor, Ricoh recommends the product
equipped with the Inrush Current Limit Time Adjustable Function.
The inrush current limit circuit of the RP132x Series has a DELAY pin and is able to adjust time of the inrush current limitation by
connecting capacitor with a DELAY pin. (Graph 4)
The relation between the inrush current limit time (t
D
) and the capacitance of the capacitor connecting with DELAY pin (C
D
(F)) is
calculatable by the following formula;
-12
6
t
D
=( C
D
+ 70
×
10
)
×
0.525
×
10
The inrush current is limited even if the capacitor is not connected with the DELAY pin. In this case, the time is calculated as C
D
=0
by the formula above. (t
D
= about 37μs)
When you do not use C
D
of E/F version, the delay pin should be open.
Imaginary graph
CE Input Voltage
CE Input Voltage
Output Voltage
Output Voltage
Limiting not enough because of the
limiting time is too short
Limiting the inrush current
Inrush Current
Inrush Current
Extended the
inrush current
limiting time
Time t (µs)
Time t (µs)
(Graph 4)
Good Load Regulation
RP132x is less affected by the output current load because it separates the output voltage pin and the feedback voltage pin.
So, RP132x is very good load regulation, the load regulation is Typ.5mV (I
OUT
=1A)
The currently available information as of October 2012 is provided in this New Product News.
EK-265-121001
Embedded System
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