XC6225 Series
ETR0342-002
30mA High Speed LDO Regulator
■GENERAL DESCRIPTION
The XC6225 series is a high accuracy, low noise, and low dropout CMOS LDO regulator. The series includes a
reference voltage source, an error amplifier, a driver transistor, a current limiter, and a phase compensation circuit.
The CE function enables the entire circuit to be turned off by a low level input signal to the CE pin. In this stand-by
state, the XC6225B series can discharge the electric charge stored at the output capacitor through the internal
auto-discharge switch, and as a result the VOUT pin quickly returns to the VSS level. The output stabilization capacitor
(CL) is also compatible with low ESR ceramic capacitors. Output voltage is selectable in 0.05V increments within a
range of 0.8V~5.0V. The current limit fold-back circuit works as a short circuit protection as well as the output current
limiter. The series achieves a fast response with only 25μA of low power consumption. The current limit is set to
50mA (TYP.) so that the device is optimized to protect the circuit from over-current. It is ideally suited for applications
requiring 30 mA or less.
A small USP-4 package makes high density mounting possible.
■APPLICATIONS
● Cellular phones
● Cordless phones,
Wireless communication equipment
● Portable games
● Cameras, VCRs
● Portable AV equipment
● PDAs
■FEATURES
Output Current
Dropout Voltage
Operating Voltage Range
Output Voltage Range
Accuracy
: 30mA <50mA (TYP.) Limit>
: 70mV@ IOUT=30mA, VOUT=3.2V
: 2.5V ~ 6.0V
: 0.8V~5.0V (0.05V increments)
: +2% (VOUT>1.5V)
+0.03V (VOUT≦1.45V)
: 25μA (TYP.)
: Less than 0.1μA
: 70dB @ 1kHz
: -40℃~+85℃
Low Power Consumption
Stand-by Current
High Ripple Rejection
Operating Temperature
Range
Output Capacitor
: 1.0μF ceramic capacitor
CL High-Speed Auto-Discharge (XC6225B)
Low Output Noise
Packages
: USP-4, SOT-25
SSOT-24 (under development)
■TYPICAL APPLICATION CIRCUIT
1/15
XC6225 Series
■PIN CONFIGURATION
(under development)
*The heat sink pad of the USP-4 is recommended
to be soldered to enhance the strength. Please
refer to the reference mount pattern and metal
mask pattern. This pad should be electrically
opened or connected to the VSS (No.2) pin.
■PIN ASSIGNMENT
PIN NUMBER
PIN NAME
FUNCTIONS
4
VIN
Power Input
5
3
VOUT
Output
2
2
VSS
Ground
3
4
1
-
CE
NC
ON/OFF Control
No Connection
USP-4
SOT-25
SSOT-24
4
1
1
2
3
-
*SSOT-24 is under development.
2/15
XC6225
Series
■PRODUCT CLASSIFICATION
●Ordering Information
XC6225①②③④⑤⑥-⑦(*1)
DESIGNATOR
①
② ③
④
⑤⑥-⑦
(*1)
(*2)
DESCRIPTION
Type of Regulator
Output Voltage
SYMBOL
CE High Active, Without CL discharge function
B
CE High Active, With CL discharge function
08～50
e.g. 3.0V → ①=3, ②=0
2
nd
Output voltage is { x.x0V } (the 2 decimal place is “0”)
2% (VOUT(T)≧1.5V), Within ±0.03V (VOUT(T)≦1.40V)
A
nd
Output voltage is { x.x5V } (the 2 decimal place is “5”)
±2% (VOUT≧1.55V), Within ±0.03V (VOUT≦1.45V)
Output Voltage
Accuracy
Packages
Taping Type (*2)
DESCRIPTION
A
GR-G
MR-G
NR-G
USP-4 (Halogen & Antimony free)
SOT-25 (Halogen & Antimony free)
SSOT-24 (Halogen & Antimony free) under development
The ”-G” suffix indicates that the products are Halogen and Antimony free as well as being fully RoHS compliant.
The device orientation is fixed in its embossed tape pocket.
For reverse orientation, please contact your local Torex sales office or representative.
(Standard orientation: ⑤R-⑦, Reverse orientation: ⑤L-⑦)
3/15
XC6225 Series
■BLOCK DIAGRAMS
●XC6225B Series
●XC6225A Series
*Diodes inside the circuit are an ESD protection diode and a parasitic diode.
■ABSOLUTE MAXIMUM RATINGS
PARAMETER
Input Voltage
Output Current
Output Voltage
CE Input Voltage
USP-4
Power Dissipation
SOT-25
SSOT-24
Operating Temperature Range
Storage Temperature Range
(*1)
IOUT ≦ Pd / (VIN-VOUT)
*SSOT-24 is under development.
4/15
SYMBOL
VIN
IOUT
VOUT
VCE
Pd
Topr
Tstg
RATINGS
VSS-0.3～+6.5
400 (*1)
VSS-0.3～VIN+0.3
VSS-0.3～+6.5
120
250
150
-40～+85
-55～+125
Ta=25℃
UNITS
V
mA
V
V
mW
℃
℃
XC6225
Series
■ELECTRICAL CHARACTERISTICS
●XC6225A/B Series
PARAMETER
Output Voltage
SYMBOL
VOUT(E)
CONDITIONS
MIN.
TYP.
MAX.
VOUT(T)≧1.50V
VCE=VIN, IOUT=10mA
×0.98
VOUT(T)≦1.45V
VCE=VIN, IOUT=10mA
-0.03
+0.03
（*3）
（*3）
（*3）
(*2)
UNITS
Ta=25℃
CIRCUIT
V
①
×1.02
VOUT(T)
（*3）
（*4）
Output Current
IOUTMAX
VCE=VIN
VIN= VOUT(T)+1.0V
1.5V≦VOUT(T)≦5.0V
VCE=VIN
VIN=2.5V
0.8V≦VOUT(T)≦1.45V
Load Regulation
ΔVOUT
VCE=VIN
0.1mA≦IOUT≦30mA
-
12
mV
①
Vdif
IOUT=30mA, VCE=VIN
DROPOUT VOLTAGE
CHART
mV
①
Supply Current
ISS
VIN=VOUT+1.0V, IOUT=0ｍA
-
25
50
μA
②
Stand-by Current
ISTBY
VIN=6.0V, VCE=VSS
-
0.01
0.1
μA
②
-
0.01
0.20
%/V
①
2.5
-
6.0
V
①
-
±100
-
ppm/℃
①
Dropout Voltage
(*5)
Line Regulation
ΔVOUT/
(ΔVIN・VOUT)
Input Voltage
VIN
Output Voltage
Temperature
Characteristics
ΔVOUT/
(ΔTa・VOUT)
VOUT(T)+0.5V≦VIN≦6.0V
VOUT(T)≧2.0V,
VCE=VIN, IOUT=10mA
2.5V≦VIN≦6.0V
VOUT(T)≦1.95V
VCE=VIN, IOUT=10mA
VCE=VIN, IOUT=30mA
-40℃≦Ta≦85℃
30
50
-
mA
①
5
5/15
XC6225 Series
■ELECTRICAL CHARACTERISTICS (Continued)
Ta=25℃
●XC6225A/B Series (Continued)
PARAMETER
SYMBOL
CONDITIONS
VIN=5.75VDC+0.5Vp-pAC
5.0V≧VOUT(T)≧4.8V
VCE=VIN, IOUT=30mA, f=1kHz
Ripple Rejection
Rate
Limit Current1(*9)
Limit Current2(*9, *10)
PSRR
ILIM1
ILIM 2
Limit Current3(*9, *10)
ILIM 3
Short Current
ISHORT
CE High Level
Voltage
CE Low Level Voltage
MIN.
TYP.
MAX.
-
60
-
VIN=｛VOUT(T)+1.0｝VDC+0.5Vp-pAC
4.75V≧VOUT(T)≧4.05V
VCE=VIN, IOUT=30mA, f=1kHz
VIN=｛VOUT(T)+1.0｝VDC+0.5Vp-pAC
4.0V≧VOUT(T)≧1.75V
VCE=VIN, IOUT=30mA, f=1kHz
VIN=2.75VDC+0.5Vp-pAC
1.7V≧VOUT(T)≧0.8V
VCE=VIN, IOUT=30mA, f=1kHz
VIN=6.0V, VCE=VIN
5.0V≧VOUT(T)≧0.8V
VIN=VOUT(T)+1.0V, VCE=VIN
5.0V≧VOUT(T)≧1.5V
VIN=2.5V
1.45V≧VOUT(T)≧0.8V
VIN=VOUT(T)+0.1V
5.0V≧VOUT(T)≧2.4V
VIN=2.5V
2.35V≧VOUT(T)≧1.55V
VCE=VIN
VOUT is short-circuited at the VSS level
-
70
-
30
50
70
30
50
70
UNITS
CIRCUIT
dB
③
mA
①
-
50
70
-
15
-
mA
①
VCEH
1.2
-
6.0
V
④
VCEL
-
-
0.3
V
④
CE High Level
Current
ICEH
VCE=VIN
-0.1
-
0.1
μA
④
CE Low Level Current
ICEL
VCE=VSS
-0.1
-
0.1
μA
④
CL Auto-Discharge
Resistance (*8)
RDCHG
-
780
-
Ω
①
VIN=6.0V, VOUT=4.0V, VCE= VSS
NOTE:
* 1: Unless otherwise stated regarding input voltage conditions, 1.5V≦VOUT(T)≦5.0V is VIN=VOUT(T)＋1.0V, and 0.8V≦VOUT(T)≦1.45V is VIN=2.5V.
* 2: VOUT (E) = Effective output voltage (Refer to the voltage chart)
(I.e. the output voltage when stabilized "VOUT (T) ＋1.0V" is provided at the VIN pin while maintaining a certain IOUT value.)
* 3: The output voltage VOUT (E) is shown in the voltage chart.
* 4: VOUT (T) = Nominal output voltage
(*7)
(*6)
* 5: Vdif ={VIN1 -VOUT1 }
* 6: VOUT1=A voltage equal to 98% of the output voltage when an amply stabilized {VOUT (T) +1.0V} is input.
* 7: VIN1= The input voltage when VOUT1 appears at the VOUT pin while input voltage is gradually decreased.
* 8: For the XC6225B series only. The XC6225A series discharges by using the two resistors R1 and R2 shown in the block diagram.
*9: Limit current is defined as the output current when VOUT(E) x 0.95 is impressed at the VOUT pin.
*10: The device may not satisfy the specification values when it is used with the input voltages lower than the conditions of ILIM2(1.45V≧VOUT(T)≧0.8V) and ILIM3.
6/15
XC6225
Series
■OUTPUT VOLTAGE CHART
●Voltage Table1
NOMINAL
OUTPUT VOLTAGE
OUTPUT
±2% (V)
VOLTAGE
(V)
VOUT(E)
VOUT(T)
MIN.
MAX.
0.80
0.85
0.90
0.95
1.00
1.05
1.10
1.15
1.20
1.25
1.30
1.35
1.40
1.45
1.50
1.55
1.60
1.65
1.70
1.75
1.80
1.85
1.90
1.95
2.00
2.05
2.10
2.15
2.20
2.25
2.30
2.35
2.40
2.45
2.50
2.55
2.60
2.65
2.70
2.75
2.80
2.85
2.90
2.95
0.7700
0.8200
0.8700
0.9200
0.9700
1.0200
1.0700
1.1200
1.1700
1.2200
1.2700
1.3200
1.3700
1.4200
1.4700
1.5190
1.5680
1.6170
1.6660
1.7150
1.7640
1.8130
1.8620
1.9110
1.9600
2.0090
2.0580
2.1070
2.1560
2.2050
2.2540
2.3030
2.3520
2.4010
2.4500
2.4990
2.5480
2.5970
2.6460
2.6950
2.7440
2.7930
2.8420
2.8910
0.8300
0.8800
0.9300
0.9800
1.0300
1.0800
1.1300
1.1800
1.2300
1.2800
1.3300
1.3800
1.4300
1.4800
1.5300
1.5810
1.6320
1.6830
1.7340
1.7850
1.8360
1.8870
1.9380
1.9890
2.0400
2.0910
2.1420
2.1930
2.2440
2.2950
2.3460
2.3970
2.4480
2.4990
2.5500
2.6010
2.6520
2.7030
2.7540
2.8050
2.8560
2.9070
2.9580
3.0090
DROPOUT VOLTAGE
Vdif
(mV)
Vdif
TYP.
MAX.
325
235
160
115
85
50
40
1700
1650
1600
1550
1500
1450
1400
1350
1300
1250
1200
1150
1100
1050
1000
950
900
850
800
750
700
650
600
550
500
450
400
350
300
250
200
150
120
70
7/15
XC6225 Series
■OUTPUT VOLTAGE CHART (Continued)
●Voltage Table2
NOMINAL
OUTPUT
VOLTAGE
(V)
VOUT(T)
3.00
3.05
3.10
3.15
3.20
3.25
3.30
3.35
3.40
3.45
3.50
3.55
3.60
3.65
3.70
3.75
3.80
3.85
3.90
3.95
4.00
4.05
4.10
4.15
4.20
4.25
4.30
4.35
4.40
4.45
4.50
4.55
4.60
4.65
4.70
4.75
4.80
4.85
4.90
4.95
5.00
8/15
OUTPUT VOLTAGE
±2% (V)
VOUT(E)
MIN.
MAX.
2.9400
2.9890
3.0380
3.0870
3.1360
3.1850
3.2340
3.2830
3.3320
3.3810
3.4300
3.4790
3.5280
3.5770
3.6260
3.6750
3.7240
3.7730
3.8220
3.8710
3.9200
3.9690
4.0180
4.0670
4.1160
4.1650
4.2140
4.2630
4.3120
4.3610
4.4100
4.4590
4.5080
4.5570
4.6060
4.6550
4.7040
4.7530
4.8020
4.8510
4.9000
3.0600
3.1110
3.1620
3.2130
3.2640
3.3150
3.3660
3.4170
3.4680
3.5190
3.5700
3.6210
3.6720
3.7230
3.7740
3.8250
3.8760
3.9270
3.9780
4.0290
4.0800
4.1310
4.1820
4.2330
4.2840
4.3350
4.3860
4.4370
4.4880
4.5390
4.5900
4.6410
4.6920
4.7430
4.7940
4.8450
4.8960
4.9470
4.9980
5.0490
5.1000
DROPOUT VOLTAGE
Vdif
(mV)
Vdif
TYP.
MAX.
70
120
95
170
XC6225
Series
■OPERATIONAL EXPLANATION
The voltage divided by resistors R1 & R2 is compared with the internal reference voltage by the error amplifier. The P-channel
MOSFET connected to the VOUT pin, is then driven by the subsequent output signal. The output voltage at the VOUT pin is
controlled and stabilized by a system of negative feedback. The current limit circuit and short-circuit protection circuit operate in
relation to the level of output current. Further, the IC’s entire circuitry is turned off by the input signal to the CE pin.
●BLOCK DIAGRAM
CE
ON/OFF
Control
V IN
CE
CE/
Error
Amp
Current
Limit
+
each
circuit
V OUT
R1
Rdischg
CE/
R2
Voltage
Reference
V SS
<Input and Output Capacitors>
The XC6225 needs an output capacitor CL for phase compensation. Values required for the phase compensation are shown in
the chart below. If a loss of the capacitance happens, the stable phase compensation may not be obtained. Please ensure to
use a capacitor which does not depend on bias or temperature too much. For a stable power input, please connect an input
capacitor CIN of 1.0μF between the VIN pin and the VSS pin.
OUTPUT VOLTAGE
OUTPUT CAPACITOR
0.8V～1.15V
1.2V～1.35V
1.4V～4.0V
4.05V～5.0V
CL=4.7μF
CL=2.2μF
CL=1.0μF
CL=2.2μF
<CL Auto-Discharge Function>
XC6225B series can discharge the electric charge in the output capacitor (CL), when a low signal to the CE pin, which enables
the whole IC circuit to be turned off, is inputted via the N-channel transistor located between the VOUT pin and the VSS pin (refer
to BLOCK DIAGRAM). The CL auto-discharge resistance value is set at 780Ω(VOUT=4.0V @ VIN=6.0V at TYP.). The discharge
time of the output capacitor (CL) is set by the CL auto-discharge resistance (R) and the output capacitor (CL). By setting the time
constant of the CL auto-discharge resistance value [RDCHG] and the output capacitor value (CL) as τ(τ=C x RDCHG), the output
voltage after discharge via the N-channel transistor is calculated by the following formula.
V= VOUT(E) ×e-t / τ or ｔ= τln（V/ VOUT(E)）
Where
V: Output voltage after discharge
VOUT (E) : Output voltage
t : Discharge time,
τ: CL auto-discharge resistance RDCHG ×Output capacitor （CL）value C
9/15
XC6225 Series
■OPERATIONAL EXPLANATION (Continued)
<Current Limiter, Short-Circuit Protection>
The XC6225 series’ fold-back circuit operates as an output current limiter and a short protection circuit for the output pin. When
the load current reaches the current limit level, the fixed current limiter circuit operates and output voltage drops. When the output
pin is short-circuited to the VSS pin, the current falls and reaches about 15mA.
<CE Pin>
The IC's internal circuitry can be shutdown via the signal from the CE pin with the XC6225 series. In the shutdown state, output
at the VOUT pin will be pulled down to the VSS level via R1 & R2. However, with the XC6225B series, the CL auto-discharge
resistor is connected in parallel to R1 and R2 while the power supply is applied to the VIN pin. Therefore, time until the VOUT pin
reaches the VSS level is shorter.
The output voltage is in an undefined state when the CE pin is left open. If this IC is used with the correct voltage for the CE pin,
the logic is fixed and the IC will operate normally. However, the supply current may increase as a result of shoot-through current
in the IC's internal circuitry when a medium voltage is input.
■NOTES ON USE
1. Please use this IC within the stated absolute maximum ratings. The IC is liable to malfunction should the ratings be exceeded.
2. Where wiring impedance is high, operations may become unstable due to noise and/or phase lag depending on output current.
Please wire the input capacitor (CIN) and the output capacitor (CL) as close to the IC as possible.
10/15
XC6225
Series
■TEST CIRCUITS
●Circuit①: Output Voltage, Output Current, Dropout Voltage, Line Regulation, Load Regulation, Current Limit,
Short Current, CL Discharge Resistance
●Circuit②:
Supply Current, Stand-by Current
・測定回路 2（消費電流・スタンバイ電流）
●Circuit③:
Ripple Rejection Rate
・測定回路 3（リップル除去率）
11/15
XC6225 Series
■TEST CIRCUITS (Continued)
●Circuit④:
CE “High” “Low” Level Voltage, CE “High” “Low” Level Current
・測定回路 4（CE”H”L”レベル電圧・CE”H”L”レベル電流）
12/15
XC6225
Series
■PACKAGING INFORMATION
1.3MAX
1.1±0.1
0.2MIN
●SOT-25 (unit: mm)
+0.2
1.6
-0.1
2.8±0.2
●USP-4 (unit: mm)
●SSOT-24 (unit: mm)
(under development)
13/15
XC6225 Series
■PACKAGING INFORMATION (Continued)
●USP-4 Reference Pattern Layout
●USP-4 参考パターンレイアウト
●USP-4 Reference
Metal Mask Design
●USP-4
参考メタルマスクデザイン
1.0
0.8
0.35
0.35
0.35
4
3
4
3
1
2
0.6
14/15
0.5
1.9
0.3
0.3
0.4
0.7
2.0
0.3
0.4
0.35
1
0.6
2
XC6225
Series
1. The products and product specifications contained herein are subject to change without
notice to improve performance characteristics.
Consult us, or our representatives
before use, to confirm that the information in this datasheet is up to date.
2. We assume no responsibility for any infringement of patents, patent rights, or other
rights arising from the use of any information and circuitry in this datasheet.
3. Please ensure suitable shipping controls (including fail-safe designs and aging
protection) are in force for equipment employing products listed in this datasheet.
4. The products in this datasheet are not developed, designed, or approved for use with
such equipment whose failure of malfunction can be reasonably expected to directly
endanger the life of, or cause significant injury to, the user.
(e.g. Atomic energy; aerospace; transport; combustion and associated safety
equipment thereof.)
5. Please use the products listed in this datasheet within the specified ranges.
Should you wish to use the products under conditions exceeding the specifications,
please consult us or our representatives.
6. We assume no responsibility for damage or loss due to abnormal use.
7. All rights reserved. No part of this datasheet may be copied or reproduced without the
prior permission of TOREX SEMICONDUCTOR LTD.
15/15