R5325x SERIES
150mA Dual LDO REGULATOR
NO.EA-127-071112
OUTLINE
The R5325x Series are CMOS-based voltage regulator ICs with high output voltage accuracy, low supply
current (Typ. 3.0µA), low dropout, and fast transient response. Each of these voltage regulator ICs consists of a
voltage reference unit, an error amplifier, resistors for setting output voltage, a current limit circuit, and a chip
enable circuit.
These ICs perform with low dropout voltage due to built-in transistor with low ON resistance, and a chip enable
function prolongs the battery life of each system. The line transient response and load transient response of the
R5325x Series are excellent, thus these ICs are very suitable for the power supply for hand-held communication
equipment.
The supply current at no load of R5325x Series is remarkably reduced compared with R5323x Series. The
mode change signal to reduce the supply current is not necessary.
The output voltage of these ICs is internally fixed with high accuracy (±1.0%). Since the packages for these
ICs are SOT-23-6 and DFN(PLP)1820-6 package, dual LDO regulators are included in each, high density
mounting of the ICs on boards is possible.
FEATURES
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Input Voltage ................................................................. 1.5V to 6.0V
Output Voltage ..............................................................1.2V to 4.0V
Output Voltage Accuracy...............................................±1.0%
Supply Current ..............................................................Typ. 3.0µA (VR1, VR2)
Standby Current ............................................................ Typ. 0.1µA (VR1, VR2)
Dropout Voltage ............................................................ Typ. 0.2V (I
OUT
=150mA
,V
OUT
=3.0V)
Ripple Rejection............................................................ Typ. 55dB (f=1kHz)
Built-in fold-back protection circuit ................................ Typ. 50mA (Current at short mode)
Temperature-Drift Coefficient of Output Voltage ........... Typ.
±100ppm/°C
Line Regulation ............................................................. Typ.0.1%/V
Built-in chip enable circuit (active “H”)
Fast Transient Response Time from large load current to small load current. (50% less than R5323x)
Packages ..................................................................... SOT-23-6, DFN(PLP)1820-6
Ceramic Capacitor is recommended. (0.1µF or more)
APPLICATIONS
•
Power source for handheld communication equipment.
•
Power source for electrical appliances such as cameras, VCRs and camcorders.
•
Power source for battery-powered equipment.
1
R5325x
BLOCK DIAGRAMS
R5325xxxxA
CE1
V
OUT1
Error
Amp.
Vref
Current Limit
R1_1
R2_1
V
DD
R1_2
Error
Amp.
Vref
Current Limit
R2_2
GND
CE2
V
OUT2
R5325xxxxB
CE1
V
OUT1
Error
Amp.
Vref
Current Limit
R1_1
R2_1
V
DD
GND
R1_2
Error
Amp.
Vref
Current Limit
R2_2
CE2
V
OUT2
2
R5325x
SELECTION GUIDE
The output voltage, auto discharge function*, and the taping type for the ICs can be selected at the user's
request.
The selection can be made with designating the part number as shown below;
R5325xxxxx-xx-x
←
Part Number
↑ ↑ ↑ ↑ ↑
a b c d e
Code
Contents
a
b
c
d
e
Designation of Package Type:
N: SOT-23-6
K: DFN(PLP)1820-6
Setting combination of 2ch Output Voltage (V
OUT
) :
Serial Number for Voltage Setting, Stepwise setting with a step of 0.1V in the range of
1.2V to 4.0V is possible for each channel.
Designation of Mask Option:
A version: without auto discharge function* at OFF state.
B version: with auto discharge function* at OFF state.
Designation of Taping Type:
Ex. TR (refer to Taping Specifications; TR type is the standard direction.)
Designation of composition of plating:
−
F : Lead free plating (SOT-23-6)
None : Au plating (DFN(PLP)1820-6)
*) When the mode is into standby with CE signal, auto discharge transistor turns on, and it makes the turn-off
speed faster than normal type.
3
R5325x
PIN CONFIGURATION
SOT-23-6
Top View
6
5
4
6
5
4
4
5
6
DFN(PLP)1820-6
Bottom View
(mark side)
1
2
3
1
2
3
3
2
1
PIN DESCRIPTIONS
•
SOT-23-6
Pin No.
Symbol
Description
•
V
OUT1
V
DD
V
OUT2
CE2
GND
CE1
Output Pin 1
Input Pin
Output Pin 2
Chip Enable Pin 2
Ground Pin
Chip Enable Pin 1
DFN(PLP)1820-6
Pin No.
Symbol
Description
1
2
3
4
5
6
1
2
3
4
5
6
V
OUT2
V
DD
V
OUT1
CE1
GND
CE2
Output Pin 2
Input Pin
Output Pin 1
Chip Enable Pin 1
Ground Pin
Chip Enable Pin 2
∗
Tab in the
parts have GND level.
(They are connected to the back side of this IC.)
Do not connect to other wires or land patterns.
4
R5325x
ABSOLUTE MAXIMUM RATINGS
Symbol
Item
Rating
Unit
V
IN
V
CE
V
OUT
I
OUT1
, I
OUT2
P
D
Topt
Tstg
Input Voltage
Input Voltage (CE Pin)
Output Voltage
Output Current
Power Dissipation (SOT-23-6) *
Power Dissipation (DFN(PLP)1820-6) *
Operating Temperature Range
Storage Temperature Range
6.5
−
0.3 to 6.5
−
0.3 to V
IN
+
0.3
V
V
V
mA
mW
°
C
°
C
200
420
880
−
40 to 85
−
55 to 125
*) For Power Dissipation, please refer to PACKAGE INFORMATION to be described.
ABSOLUTE MAXIMUM RATINGS
Absolute Maximum ratings are threshold limit values that must not be exceeded ever for an instant under
any conditions. Moreover, such values for any two items must not be reached simultaneously. Operation
above these absolute maximum ratings may cause degradation or permanent damage to the device.
These are stress ratings only and do not necessarily imply functional operation below these limits.
5
ARM技术
