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XC6221D451NR-G

更新时间：2025-07-01 10:58:50
品牌：TOREX
描述：XC6221系列是具有高精度,低噪声,高速度,兼容低ESR电容,采用CMOS工艺生产的低压差LDO电压稳压器，内部包括参考电压源电路，误差放大器电路，过流保护电路和相位补偿电路。 XC6221系

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XC6221D451NR-G 概述

XC6221系列是具有高精度,低噪声,高速度,兼容低ESR电容,采用CMOS工艺生产的低压差LDO电压稳压器，内部包括参考电压源电路，误差放大器电路，过流保护电路和相位补偿电路。 XC6221系

XC6221D451NR-G 数据手册

通过下载XC6221D451NR-G数据手册来全面了解它。这个PDF文档包含了所有必要的细节，如产品概述、功能特性、引脚定义、引脚排列图等信息。

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ETR0328_009  
■GENERAL DESCRIPTION  
The XC6221 series is a high accuracy, low noise, high speed, low dropout CMOS regulator with high ripple rejection. The series  
includes a reference voltage source, an error amplifier, a current limiter, and a phase compensation circuit.  
The CE function enables the entire circuit to be in stand-by state by inputting low level signal. In this stand-by mode, the  
electric charge at the output capacitor (CL) will be discharged by 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, using the laser trimming technology set in factory.  
The current limiter's fold-back circuit also operates as a short circuit protection and an output current limiter at the output pin.  
The series achieves a fast response with only 25μA of low power consumption. Also the series has low dropout voltage  
characteristics, which is 80mV at IOUT=100mA and VOUT=3.0V.  
With the use of small USP-4 and ultra small USPN-4 packages, a small footprint circuit can be designed.  
■APPLICATIONS  
■FEATURES  
Output Current  
Dropout Voltage  
Operating Voltage Range  
Output Voltages  
Accuracy  
: 200mA <Up to 250mA (TYP.)>  
:80mV@ IOUT=100mA,VOUT=3.0V  
: 1.6V ~ 6.0V  
: 0.8V~5.0V (0.05V increments)  
: +2% (VOUT >1.5V)  
(+1% option is available)  
+30mV (VOUT≦1.45V)  
(+20mV option is available)  
: 25μA (TYP.)  
●Cellular phones  
●Cordless phones  
●Wireless communication equipment  
●Portable games  
Low Power Consumption  
Stand-by Current  
●Cameras, VCRs  
: Less than 0.1μA  
High Ripple Rejection  
Operating Temperature  
Low ESR Capacitor  
CL High-Speed Auto-Discharge (XC6221B)  
CE Pin internally pulled-down  
Low Output Noise  
: 70dB @ 1kHz  
: -40℃~85℃  
: 1.0μF ceramic capacitor  
●Portable AV equipment  
●PDAs  
Ultra Small Packages  
: USP-4, SOT-25, SSOT-24  
USPN-4  
■TYPICAL APPLICATION CIRCUIT ■TYPICAL PERFORMANCE  
CHARACTERISTICS  
●Load Transient Response  
XC6221x182  
VIN=CE=2.8V, Tr=Tf=5us  
Topr=25 , C =CL=1uF (ceramic)  
IN  
℃
1.9  
300  
250  
200  
150  
100  
50  
Output Voltage  
1.8  
1.7  
1.6  
Output Current  
1.5  
1.4  
1.3  
0
Time (500us/div)  
1/23  
XC6221 Series  
■PIN CONFIGURATION  
VOUT  
5
NC  
4
VIN  
4
VOUT  
3
VSS  
2
1
3 CE  
VOUT  
4
VIN  
1
2
1
2
3
CE  
VSS  
VIN  
VSS  
CE  
SSOT-24  
SOT-25  
USP-4  
(BOTTOM VIEW)  
(TOP VIEW)  
(TOP VIEW)  
3 CE  
VSS  
2
1
VOUT  
4
VIN  
USPN-4  
(BOTTOM VIEW)  
*The heat dissipation pad of the USP-4 package is  
recommended to solder as the recommended  
mount pattern and metal mask pattern for mounting  
strength. The mount pattern should be electrically  
opened or connected to the VSS (No.2) pin.  
■PIN ASSIGNMENT  
PIN NUMBER  
PIN NAME  
FUNCTIONS  
USP-4  
SOT-25  
SSOT-24 USPN-4  
4
1
2
3
-
1
5
2
3
4
4
3
2
1
-
4
1
2
3
-
VIN  
VOUT  
VSS  
CE  
Power Input  
Output  
Ground  
ON/OFF Control  
No Connection  
NC  
2/23  
XC6221  
Series  
■PRODUCT CLASSIFICATION  
●Ordering Information  
(*1)  
XC6221 ①②③④⑤⑥-⑦  
DESIGNATOR  
DESCRIPTION  
SYMBOL  
A
DESCRIPTION  
No CE pull-down resistor without CL auto discharge  
B
C
No CE pull-down resistor with CL auto discharge  
CE pull-down resistor without CL auto discharge  
CE pull-down resistor with CL auto discharge  
Type of Regulator  
(All CE high active)  
①
D
② ③  
Output Voltage  
08 ~ 40  
ex.) VOUT(T) = 3.0V → ② = 3, ③ = 0  
+30mV @ 0.8V≦VOUT(T)≦1.40V  
When 0.1V steps such as VOUT(T)=0.8V → ②=0, ③=8, ④=2  
2
+2% @ VOUT(T)>1.5V  
When 0.1V steps such as VOUT(T)=1.5V → ②=1, ③=5, ④=2  
+30mV @ 0.85V≦VOUT(T)≦1.45V  
When 0.05V steps such as VOUT(T)=0.85V → ②=0, ③=8, ④=A  
+2% @ VOUT(T)>1.55V  
When 0.05V steps such as VOUT(T)=1.55V → ②=1, ③=5, ④=A  
+20mV @ 0.8V≦VOUT(T)≦1.90V  
When 0.1V steps such as VOUT(T)=0.8V → ②=0, ③=8, ④=1  
+1% @ VOUT(T)>2.0V  
A
1
④
Output Accuracy  
When 0.1V steps such as VOUT(T)=2.0V → ②=2, ③=0, ④=1  
+20mV @ 0.85V≦VOUT(T)≦1.95V  
When 0.05V steps such as VOUT(T)=0.85V → ②=0, ③=8, ④=B  
+1% @ VOUT(T)>2.0V  
B
When 0.05V steps such as VOUT(T)=2.05V → ②=2, ③=0, ④=B  
GR  
USP-4  
GR-G  
MR  
USP-4 (Halogen & Antimony free)  
SOT-25  
Packages  
⑤⑥-⑦  
MR-G  
NR  
SOT-25 (Halogen & Antimony free)  
SSOT-24  
Taping Type (*2)  
NR-G  
7R-G  
SSOT-24 (Halogen & Antimony free)  
USPN-4 (Halogen & Antimony free)  
* For the USPN-4 package, 0.8V≦VOUT(T)≦1.15V is under development.  
(*1) The “-G” suffix indicates that the products are Halogen and Antimony free as well as being fully RoHS compliant.  
(*2) 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)  
3/23  
XC6221 Series  
■BLOCK DIAGRAMS  
ON/OFF  
ON/OFF  
Control  
CE  
V
CE  
V
IN  
IN  
Control  
-
+
-
+
Error  
Amp  
Error  
Amp  
Current  
Limit  
Current  
Limit  
CE CE/  
CE CE/  
each  
each  
circuit  
circuit  
V
VOUT  
OUT  
R1  
R1  
Rdischg  
CE/  
R2  
R2  
Voltage  
Voltage  
V
V SS  
SS  
Reference  
Reference  
●XC6221A Series  
●XC6221B Series  
ON/OFF  
Control  
ON/OFF  
Control  
CE  
V
CE  
VIN  
IN  
R Pull  
-down  
R Pull  
-down  
-
-
Error  
Amp  
Error  
Amp  
Current  
Limit  
Current  
Limit  
CE CE/  
CE CE/  
+
+
each  
circuit  
each  
circuit  
V
V
OUT  
OUT  
R1  
R1  
Rdischg  
CE/  
R2  
R2  
Voltage  
Voltage  
VSS  
VSS  
Reference  
Reference  
●XC6221C Series  
●XC6221D Series  
*Diodes inside the circuit are an ESD protection diode and a parasitic diode.  
■ABSOLUTE MAXIMUM RATINGS  
Ta=25℃  
PARAMETER  
Input Voltage  
SYMBOL  
VIN  
RATINGS  
VSS -0.3 ~ +6.5  
400(*1)  
UNITS  
V
mA  
V
Output Current  
Output Voltage  
CE Input Voltage  
IOUT  
VOUT  
VCE  
VSS – 0.3 ~ VIN + 0.3  
VSS – 0.3 ~ +6.5  
120  
V
USP-4  
SOT-25  
SSOT-24  
USPN-4  
250  
Power Dissipation  
Pd  
mW  
150  
100  
Operating Temperature Range  
Storage Temperature Range  
Topr  
Tstg  
- 40 ~ + 85  
- 55 ~ +125  
℃
℃
*1 IOUT=Less than Pd / (VIN-VOUT)  
4/23  
XC6221  
Series  
■ELECTRICAL CHARACTERISTICS  
●XC6221A/BC/D series  
Ta=25℃  
PARAMETER  
SYMBOL  
CONDITIONS  
MIN.  
TYP.  
MAX. UNITS CIRCUIT  
x 0.98  
x 1.02  
1.5V<VOUT(T), VCE=VIN, IOUT=10mA  
(*3)  
(*3)  
Output Voltage  
(Standard)  
VOUT(E)  
(* 2)  
VOUT(T)  
(*4)  
V
V
①
①
-0.03  
+0.03  
VOUT<1.45V, VCE=VIN, IOUT=10mA  
2.0V<VOUT(T), VCE=VIN, IOUT=10mA  
VOUT(T)<1.95V, VCE=VIN, IOUT=10mA  
(*3)  
(*3)  
x 0.99  
x 1.01  
(*3)  
(*3)  
Output Voltage  
(High Accuracy)  
VOUT(E)  
(* 2)  
VOUT(T)  
(*4)  
-0.02  
+0.02  
(*3)  
(*3)  
VCE=VIN, VIN=VOUT(T)+1.0V,  
0.8V<VOUT(T)<5.0V  
VCE=VIN,  
Output Current  
IOUTMAX  
200  
-
250  
10  
-
mA  
mV  
①
①
Load Regulation  
ꢀVOUT  
40  
0.1mA≦IOUT≦100mA  
Dropout Voltage (*5)  
Supply Current  
Vdif  
ISS  
VCE=VIN, IOUT=100mA  
VIN=VOUT+1.0V, IOUT=0mA  
VIN=6.0V, VCE=VSS  
E-2  
25  
mV  
μA  
μA  
①
②
②
-
-
50  
Standby Current  
ISTBY  
0.01  
0.10  
VOUT(T)+0.5V≦VIN≦6.0V  
ꢀVOUT /  
(ꢀVIN･VOUT)  
1.1≦VOUT(T), VCE=VIN, IOUT=10mA  
Line Regulation  
-
0.01  
0.20  
%/V  
①
1.6V≦VIN≦6.0V  
VOUT(T)≦1.05V, VCE=VIN, IOUT=10mA  
Input Voltage  
Output Voltage  
Temperature Characteristics  
VIN  
ꢀVOUT /  
Ta  
1.6  
-
-
6.0  
-
V
①
①
VCE=VIN,  
IOUT=30mA, -40℃<Ta<85℃  
±100  
ppm/℃  
(
ꢀ
･
V
OUT  
)
VIN=5.75VDC+0.5Vp-pAC  
4.75V≦VOUT(T)  
V
CE=VIN, IOUT=30mA, f=1kHz  
60  
70  
VIN=｛VOUT(T)+1.0｝VDC+0.5Vp-pAC  
4.05V≦VOUT(T)≦4.7V  
VCE=VIN, IOUT=30mA, f=1kHz  
Ripple Rejection Rate  
PSRR  
-
-
dB  
③
VIN=｛VOUT(T)+1.0｝VDC+0.5Vp-pAC  
0.85V≦VOUT(T)≦4.0V  
VCE=VIN, IOUT=30mA, f=1kHz  
VIN=1.85VDC+0.5Vp-pAC  
VOUT(T)=0.8V  
VCE=VIN, IOUT=30mA, f=1kHz  
Limit Current  
Short Current  
IL I M  
VCE=VIN  
200  
-
250  
30  
-
-
mA  
mA  
①
①
VCE=VIN, VOUT is short-circuited at the  
VSS level  
ISHORT  
CE High Level Voltage  
CE Low Level Voltage  
VCEH  
VCEL  
1.2  
-
-
-
-
-
-
6.0  
0.3  
V
V
④
④
VCE=VIN (XC6221A/B)  
VCE=6.0V (XC6221C/D)  
VCE=VSS  
-0.1  
1.03  
-0.1  
0.1  
CE High Level Current  
ICEH  
μA  
④
2.37  
0.1  
CE Low Level Current  
CL Auto-Discharge  
Resistance (* 8)  
ICEL  
μA  
④
①
RDCHG  
VIN=6.0V, VOUT(T)=4.0V, VCE=VSS  
-
780  
-
Ω
NOTE:  
* 1: Unless otherwise stated regarding input voltage conditions, VIN=VOUT(T)＋1.0V.  
* 2: VOUT (E) = Effective output voltage (Refer to the voltage chart E-0 and E-1)  
(I.e. the output voltage when HS mode and an amply stabilized "VOUT (T) ＋1.0V" is provided at the VIN pin while maintaining a  
certain IOUT value.)  
* 3: The relation between VOU T (E) and VOUT (T) is shown in the voltage chart E-0 and E-1.  
* 4: VOUT (T) = Nominal output voltage  
* 5: Vdif = {VIN1(*7)-VOUT1(*6)  
}
* 6: VOUT1 is the voltage equal to 98% of the normal output voltage when amply stabilized VOUT (T) +1.0V are input at the VIN pin.  
* 7: VIN1 is the input voltage when VOUT1 appears at the VOUT pin while input voltage is gradually decreased.  
* 8: For the XC6221B series only. The XC6221A series discharges by resistors R1 and R2 only as shown in the block diagrams.  
* 9: For operating supply current of the XC6221C/D, a current through the pull-down resistor should be considered in addition to the  
supply current value mentioned above.  
5/23  
XC6221 Series  
■OUTPUT VOLTAGE CHART  
SYMBOL  
E-0  
E-1  
E-2  
NOMINAL  
OUTPUT  
VOLTAGE  
DROPOUT VOLTAGE  
OUTPUT VOLTAGE  
Standard +2% (V)  
OUTPUT VOLTAGE  
High Accuracy +1% (V)  
Vdif  
(mV)  
(V)  
VOUT(E)  
VOUT(E)  
Vdif  
VOUT(T)  
MIN.  
MAX.  
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  
1.5800  
1.6300  
1.6800  
1.7300  
1.7800  
1.8300  
1.8800  
1.9300  
1.9800  
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  
MIN.  
MAX.  
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  
1.5200  
1.5700  
1.6200  
1.6700  
1.7200  
1.770  
TYP.  
500  
MAX.  
850  
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  
1.5200  
1.5700  
1.6200  
1.6700  
1.7200  
1.7700  
1.8200  
1.8700  
1.9200  
1.9600  
2.0090  
2.0850  
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  
0.7800  
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  
1.5800  
1.6300  
1.6800  
1.7300  
1.7800  
1.8300  
1.8800  
1.9300  
1.9800  
2.0295  
2.0790  
2.1285  
2.1780  
2.2275  
2.2770  
2.3265  
2.3760  
2.4255  
2.4750  
2.5245  
2.5740  
2.6235  
2.6730  
2.7225  
2.7720  
2.8215  
2.8710  
2.9205  
410  
330  
750  
650  
230  
410  
200  
160  
360  
290  
160  
125  
250  
210  
1.8200  
1.8700  
1.9200  
1.9700  
2.0200  
2.0705  
2.1210  
2.1715  
2.2220  
2.2725  
2.3230  
2.3735  
2.4240  
2.4745  
2.5250  
2.5755  
2.6260  
2.6765  
2.7270  
2.7775  
2.8280  
2.8785  
2.9290  
2.9795  
115  
195  
95  
170  
6/23  
XC6221  
Series  
■OUTPUT VOLTAGE CHART (Continued)  
SYMBOL  
E-0  
E-1  
E-2  
NOMINAL  
OUTPUT  
VOLTAGE  
DROPOUT VOLTAGE  
OUTPUT VOLTAGE  
Standard +2% (V)  
OUTPUT VOLTAGE  
High Accuracy +1% (V)  
Vdif  
(mV)  
(V)  
Vdif  
VOUT(E)  
VOUT(E)  
VOUT(T)  
MIN.  
MAX.  
3.0600  
3.1100  
3.1620  
3.2130  
3.2640  
MIN.  
2.9700  
3.0195  
3.0690  
3.1185  
3.1680  
MAX.  
3.0300  
3.0805  
3.1310  
3.1815  
3.2320  
TYP.  
MAX.  
3.00  
3.05  
3.10  
3.15  
3.20  
2.9400  
2.8990  
3.0380  
3.0870  
3.1360  
3.25  
3.1850  
3.3150  
3.2175  
3.2825  
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  
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  
3.3660  
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  
3.2670  
3.3165  
3.3660  
3.4155  
3.4650  
3.5145  
3.5640  
3.6135  
3.6630  
3.7125  
3.7620  
3.8115  
3.8610  
3.9105  
3.9600  
4.0095  
4.0590  
4.1085  
4.1580  
4.2075  
4.2570  
4.3065  
4.3560  
4.4055  
4.4550  
4.5045  
4.5540  
4.6035  
4.6530  
4.7025  
4.7520  
4.8015  
4.8510  
4.9005  
4.9500  
3.3330  
3.3835  
3.4340  
3.4845  
3.5350  
3.5855  
3.6360  
3.6855  
3.7370  
3.7875  
3.8380  
3.8885  
3.9390  
3.9895  
4.0400  
4.0905  
4.1410  
4.1915  
4.2420  
4.2925  
4.3430  
4.3935  
4.4440  
4.4945  
4.5450  
4.5955  
4.6460  
4.6965  
4.7470  
4.7975  
4.8480  
4.8985  
4.9490  
4.9995  
5.0500  
80  
140  
* For the USPN-4 package, 0.8V≦VOUT(T)≦1.15V is under development.  
7/23  
XC6221 Series  
■OPERATIONAL EXPLANATION  
<Output Voltage Control>  
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 & stabilized by a system of negative feedback. The current limit circuit and short protect circuit  
operate in relation to the level of output current. Further, the IC's internal circuitry can be shutdown via the CE pin's signal.  
ON/OFF  
Control  
IN  
V
CE  
-
+
Error  
Amp  
Current  
Limit  
CE  
CE/  
each  
OUT  
V
circuit  
R1  
Rdischg  
CE/  
R2  
Voltage  
SS  
V
Reference  
<Input and Output Capacitors>  
The XC6221 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.  
●Except USPN-4  
OUTPUT VOLTAGE (V)  
OUTPUT CAPACITOR VALUE  
CL ≧4.7μF  
0.8V～1.15V  
1.2V～1.35V  
1.4V～4.0V  
4.05V～5.0V  
CL ≧2.2μF  
CL ≧1.0μF  
CL ≧2.2μF  
●USPN-4  
OUTPUT VOLTAGE (V)  
OUTPUT CAPACITOR VALUE  
1.2V～4.0V  
4.05V～5.0V  
CL ≧2.2μF  
CL ≧4.7μF  
<CL Auto-Discharge Function>  
XC6221B/D 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 (cf. BLOCK DIAGRAM). The CL auto-discharge resistance value is set at 780Ω(VOUT=4.0V @ VIN=6.0V at  
typical). 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) x e –t/  
,
or t=τIn ( V / VOUT(E) )  
τ
where  
V : Output voltage after discharge  
VOUT (E) : Output voltage  
t : Discharge time  
τ: CL auto-discharge resistance RDCHG×Output capacitor (CL) value C)  
8/23  
XC6221  
Series  
■OPERATIONAL EXPLANATION (Continued)  
<Current Limiter, Short-Circuit Protection>  
The XC6221 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 30mA.  
<CE Pin>  
The XC6221 internal circuitry can be shutdown via the CE pin signal. In shutdown mode, output at the VOUT pin will be  
pulled down to the VSS level via R1 & R2. However, with the XC6221B/D 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. For the XC6221A/B, the output voltage becomes unstable, when the CE pin is left  
open. For the XC6221C/D, the output voltage becomes VSS level because the CE pin is short-circuited to VSS via an  
internal pull-down resistor. However, the CE input current will be increased via a pull-down resistor when the IC  
operates. If this IC is used with the correct output 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.  
9/23  
XC6221 Series  
■TEST CIRCUITS  
Circuit 1: Output Voltage, Output Current, Dropout Voltage, Input/Operating Voltage, Line Regulation, Load Regulation,  
Current Limit, Short Current, CL Discharge Resistance  
Circuit 2: Supply Current, Stand-by Current  
●XC6221A/B series  
●XC6221C/D series  
10/23  
XC6221  
Series  
■TEST CIRCUITS (Continued)  
Circuit 3: Ripple Rejection Rate  
Circuit 4: CE “H” “L” Level Voltage, CE “H” “L” Level Current  
11/23  
XC6221 Series  
■TYPICAL PERFORMANCE CHARACTERISTICS  
(1) Output Voltage vs. Output Current  
XC6221x182  
XC6221x182  
VIN=CE=2.8V  
CE=VIN, Topr=25  
C =CL=1.0uF (ceramic)  
℃
C =CL=1.0uF (ceramic)  
IN  
IN  
2.4  
1.8  
1.2  
0.6  
0
2.4  
1.8  
1.2  
0.6  
0
V =1.9V  
IN  
Topr=25  
℃
V =2.8V  
Topr=-40  
℃
IN  
V =6.0V  
Topr=85  
IN  
℃
0
100  
200  
300  
400  
0
100  
200  
300  
400  
Output Current: IOUT (mA)  
Output Current: IOUT (mA)  
XC6221x302  
XC6221x302  
V
IN=CE=4.0V  
CE=VIN, Topr=25  
℃
C =CL=1.0uF (ceramic)  
IN  
C =CL=1.0uF (ceramic)  
IN  
3.5  
3
3.5  
3
2.5  
2
2.5  
2
1.5  
1
1.5  
1
V =3.1V  
IN  
Topr=25  
℃
V =4.0V  
IN  
Topr=-40  
℃
0.5  
0
V =6.0V  
0.5  
0
IN  
Topr=85  
℃
0
100  
200  
300  
400  
0
100  
200  
300  
400  
Output Current: IOUT (mA)  
Output Current: IOUT (mA)  
(2) Output Voltage vs. Input Voltage  
XC6221x182  
XC6221x182  
CE=VIN, Topr=25  
℃
CE=VIN, Topr=25  
℃
C =CL=1.0uF (ceramic)  
IN  
C =CL=1.0uF (ceramic)  
IN  
2
1.9  
1.8  
1.7  
1.6  
1.5  
1.4  
1.9  
1.85  
1.8  
1.75  
1.7  
IOUT=1mA  
I
=1mA  
OUT  
I
=10mA  
OUT  
IOUT=10mA  
I
OUT=30mA  
IOUT=30mA  
1.65  
1.6  
IOUT=100mA  
OUT
I =100mA  
1
1.5  
2
2.5  
3
4
4.5  
5
5.5  
6
Input Voltage: VIN (V)  
Input Voltage: VIN (V)  
12/23  
XC6221  
Series  
■TYPICAL PERFORMANCE CHARACTERISTICS (Continued)  
(2) Output Voltage vs. Input Voltage (Continued)  
XC6221x302  
XC6221x302  
CE=VIN, Topr=25  
CE=VIN, Topr=25  
℃
℃
C =CL=1.0uF (ceramic)  
IN  
C =CL=1.0uF (ceramic)  
IN  
3.1  
3.05  
3
3.2  
3.1  
3
2.9  
2.8  
2.7  
2.6  
2.5  
2.95  
2.9  
IOUT=1mA  
IOUT=10mA  
IOUT=1mA  
IOUT=10mA  
IOUT=30mA  
IOUT=30mA  
2.85  
2.8  
I
=100mA  
IOUT=100mA  
OUT  
2
2.5  
3
3.5  
4
4
4.5  
5
5.5  
6
Input Voltage: VIN (V)  
Input Voltage: VIN (V)  
(3) Dropout Voltage vs. Output Current  
XC6221x182  
XC6221x302  
CE=VIN, Topr=25  
℃
CE=VIN, Topr=25  
℃
C =C =1.0uF (ceramic)  
IN  
L
C
L
IN=C =1.0uF (ceramic)  
0.4  
0.4  
0.35  
0.3  
0.35  
0.3  
Topr=85  
Topr=25  
℃
Topr=85  
℃
Topr=25  
℃
℃
0.25  
0.2  
0.25  
0.2  
Topr=-40  
Topr=-40  
℃
℃
0.15  
0.1  
0.15  
0.1  
0.05  
0
0.05  
0
0
50  
100  
150  
200  
0
50  
100  
150  
200  
Output Current: IOUT (mA)  
Output Current: IOUT (mA)  
(4) Output Voltage vs. Ambient Temperature  
XC6221x182  
XC6221x302  
VIN=CE=4.0V, IOUT=30mA  
C =CL=1.0uF (ceramic)  
VIN=CE=2.8V, IOUT=30mA  
C =CL=1.0uF (ceramic)  
IN  
IN  
3.1  
1.9  
1.85  
1.8  
3.05  
3
2.95  
1.75  
2.9  
1.7  
-50  
-25  
0
25  
50  
75  
100  
-50  
-25  
0
25  
50  
75  
100  
Ambient Temperature: Topr (  
)
℃
Ambient Temperature: Topr (  
)
℃
13/23  
XC6221 Series  
■TYPICAL PERFORMANCE CHARACTERISTICS (Continued)  
(5) Supply Current vs. Input Voltage  
XC6221x182  
CE=VIN, C =CL=1.0uF (ceramic)  
XC6221x302  
CE=VIN, C =CL=1.0uF (ceramic)  
IN  
IN  
70  
60  
50  
40  
30  
20  
10  
0
70  
60  
50  
40  
30  
20  
10  
0
Topr=85  
Topr=25  
℃
Topr=85  
Topr=25  
℃
℃
℃
Topr=-40  
℃
Topr=-40  
℃
0
1
2
3
4
5
6
0
1
2
3
4
5
6
Input Voltage: VIN (V)  
Input Voltage:VIN (V)  
(6) CL-Discharge Resistance vs. Ambient Temperature  
XC6221B  
VIN=6.0V, CE=VSS, VOUT =4.0V  
C =CL=1.0uF (ceramic)  
IN  
1200  
1000  
800  
600  
400  
200  
0
-50  
-25  
0
25  
50  
75  
100  
Ambient Temperature: Topr (  
)
℃
(7) Load Transient Response  
XC6221x302  
XC6221x182  
V
IN=CE=2.8V, Tr=Tf=5us  
V
IN=CE=4.0V, Tr=Tf=5us  
Topr=25 , C =CL=1uF (ceramic)  
IN  
Topr=25 , C =CL=1uF (ceramic)  
IN  
℃
℃
1.9  
1.8  
1.7  
1.6  
1.5  
1.4  
1.3  
300  
3.1  
3
300  
250  
200  
150  
100  
50  
Output Voltage  
Output Voltage  
250  
200  
150  
100  
50  
2.9  
2.8  
2.7  
2.6  
2.5  
Output Current  
Output Current  
0
0
Time (500us/div)  
Time (500us/div)  
14/23  
XC6221  
Series  
■TYPICAL PERFORMANCE CHARACTERISTICS (Continued)  
(8) Line Transient Response  
XC6221x182  
XC6221x182  
CE=VIN, Tr=Tf=5us  
CE=VIN, Tr=Tf=5us  
I
OUT=30mA, Topr=25 , CL=1uF (ceramic)  
℃
IOUT =1mA, Topr=25 , C =1uF (ceramic)  
℃
L
5
4
2
5
4
2
Input Voltage  
Input Voltage  
1.95  
1.9  
1.85  
1.8  
1.75  
1.7  
1.95  
1.9  
1.85  
1.8  
1.75  
1.7  
3
3
2
2
Output Voltage  
Output Voltage  
1
1
0
0
-1  
-1  
Time (20us/div)  
Time (20us/div)  
XC6221x182  
XC6221x302  
CE=VIN, Tr=Tf=5us  
CE=VIN,Tr=Tf=5us  
=1uF (ceramic)  
I
OUT=100mA, Topr=25 , C  
L
=1uF (ceramic)  
I
OUT=1mA, Topr=25 , C  
L
℃
℃
5
4
3
2
1
0
2
6
3.2  
3.15  
3.1  
3.05  
3
Input Voltage  
Input Voltage  
1.95  
1.9  
1.85  
1.8  
1.75  
1.7  
5
4
3
2
1
0
Output Voltage  
Output Voltage  
2.95  
2.9  
-1  
Time (20us/div)  
Time (20us/div)  
XC6221x302  
CE=V , Tr=Tf=5us  
XC6221x302  
CE=V , Tr=Tf=5us  
IN  
IN  
I
=30mA, Topr=25 , C =1uF (ceramic)  
I
=100mA, Topr=25 , C =1uF (ceramic)  
OUT L  
℃
OUT  
L
℃
6
3.2  
3.15  
3.1  
3.05  
3
6
3.2  
3.15  
3.1  
3.05  
3
Input Voltage  
Input Voltage  
5
4
3
2
1
0
5
4
3
2
1
0
Output Voltage  
Output Voltage  
2.95  
2.9  
2.95  
2.9  
Time (20us/div)  
Time (20us/div)  
15/23  
XC6221 Series  
■TYPICAL PERFORMANCE CHARACTERISTICS (Continued)  
(9) Input Rise Characteristics  
XC6221x182xx  
XC6221x182xx  
CE=VIN, Tr=5us  
CE=VIN, Tr=5us  
IOUT=1mA, Topr=25 , CL=1.0uF (ceramic)  
IOUT=30mA, Topr=25 , CL=1.0uF (ceramic)  
℃
℃
4
3
7
6
5
4
3
2
1
0
4
3
7
6
5
4
3
2
1
0
Input Voltage  
Input Voltage  
2
2
1
1
0
0
Output Voltage  
Output Voltage  
-1  
-2  
-3  
-1  
-2  
-3  
Time (40us/div)  
Time (40us/div)  
XC6221x182  
XC6221x302  
CE=VIN, Tr=5us  
CE=VIN, Tr=5us  
I
OUT=100mA, Topr=25 , CL=1.0uF (ceramic)  
IOUT=1mA, Topr=25 , CL=1.0uF (ceramic)  
℃
℃
4
7
6
5
4
3
2
1
0
5
4
8
Input Voltage  
Input Voltage  
7
6
5
4
3
2
1
0
3
2
3
2
1
1
Output Voltage  
0
0
Output Voltage  
-1  
-2  
-3  
-1  
-2  
-3  
Time (40us/div)  
Time (40us/div)  
XC6221x302  
XC6221x302  
CE=VIN, Tr=5us  
CE=VIN, Tr=5us  
IOUT=30mA, Topr=25 , CL=1.0uF (ceramic)  
℃
IOUT=100mA, Topr=25 , CL=1.0uF (ceramic)  
℃
5
8
5
8
7
6
5
4
3
2
1
0
Input Voltage  
Input Voltage  
4
3
7
6
5
4
3
2
1
0
4
3
2
2
1
1
Output Voltage  
Output Voltage  
0
0
-1  
-2  
-3  
-1  
-2  
-3  
Time (40us/div)  
Time (40us/div)  
16/23  
XC6221  
Series  
■TYPICAL PERFORMANCE CHARACTERISTICS (Continued)  
(10) CE Rise Characteristics  
XC6221x182  
XC6221x182  
VIN=2.8V, Tr=5us  
VIN=2.8V, Tr=5us  
IOUT=1mA, Topr=25 , C =CL=1.0uF (ceramic)  
IN  
℃
IOUT=30mA, Topr=25 , C =CL=1.0uF (ceramic)  
IN  
℃
5
4
8
7
6
5
4
3
2
1
0
5
4
8
7
6
5
4
3
2
1
0
CEInput Voltage  
CEInput Voltage  
3
3
2
2
1
1
0
0
Output Voltage  
Output Voltage  
-1  
-2  
-3  
-1  
-2  
-3  
Time (40us/div)  
Time (40us/div)  
XC6221x182  
XC6221x302  
V
IN=2.8V, Tr=5us  
VIN=4.0V, Tr=5us  
IOUT=100mA, Topr=25 , C =CL=1.0uF (ceramic)  
IN  
IOUT=1mA, Topr=25 , C =CL=1.0uF (ceramic)  
IN  
℃
℃
5
4
3
2
1
0
8
7
6
5
4
3
2
1
0
5
8
CEInput Voltage  
4
3
7
6
5
4
3
2
1
0
CEInput Voltage  
2
1
Output Voltage  
0
Output Voltage  
-1  
-2  
-3  
-1  
-2  
-3  
Time (40us/div)  
Time (40us/div)  
XC6221x302  
XC6221x302  
V
IN=4.0V, Tr=5us  
VIN=4.0V, Tr=5us  
I
OUT=30mA, Topr=25 , C =CL=1.0uF (ceramic)  
IN  
I
OUT=100mA, Topr=25 , CIN=C  
L
=1.0uF (ceramic)  
℃
℃
5
4
8
7
6
5
4
3
2
1
0
5
4
3
2
1
0
8
7
6
5
4
3
2
1
0
CEInput Voltage:  
CEInput Voltage  
3
2
1
Output Voltage  
Output Voltage  
0
-1  
-2  
-3  
-1  
-2  
-3  
Time (40us/div)  
Time (40us/div)  
17/23  
XC6221 Series  
■TYPICAL PERFORMANCE CHARACTERISTICS (Continued)  
(11) Ripple Rejection Rate  
XC6221x182  
VIN=CE=2.8VDC+0.5Vp-pAC  
IOUT=30mA, Topr=25 , CL=1.0uF (ceramic)  
XC6221x302  
VIN=CE=4.0VDC+0.5Vp-pAC,  
IOUT =30mA, Topr=25 , C =1.0uF (ceramic)  
,
℃
℃
L
80  
70  
60  
50  
40  
30  
20  
10  
0
80  
70  
60  
50  
40  
30  
20  
10  
0
0.01  
0.1  
1
10  
100  
1000  
0.01  
0.1  
1
10  
100  
1000  
Ripple Frequency: f (kHz)  
Ripple Frequency: f (kHz)  
18/23  
XC6221  
Series  
■PACKAGING INFORMATION  
●USP-4  
●SOT-25  
* Soldering fillet surface is not formed  
because the sides of the pins are plated.  
●SSOT-24  
●USPN-4  
19/23  
XC6221 Series  
■PACKAGING INFORMATION (Continued)  
●USP-4 Reference Pattern Layout  
●USP-4 Reference Metal Mask Design  
●USPN-4 Reference Pattern Layout  
●USPN-4 Reference Metal Mask Design  
20/23  
XC6221  
Series  
■MARKING RULE  
●SOT-25 / USP-4  
①Represents product series  
5
4
MARK  
PRODUCT SERIES  
XC6221******  
XC6221S*****  
3
①
②
③
④
⑤
1
2
4
3
1
2
3
SOT-25  
(TOP VIEW)  
USP-4  
(TOP VIEW)  
②Represents type of regulator  
MARK  
OUTPUT VOLTAGE 0.1V INCREMENTS OUTPUT VOLTAGE 0.05V INCREMENTS  
PRODUCT SERIES  
VOUT =0.8～3.0V  
VOUT =3.1～5.0V  
VOUT =0.85～3.05V  
VOUT =3.15～4.95V  
V
X
A
B
E
F
L
XC6221A*****  
XC6221B*****  
M
Custom products：Represents last 1 digits of registered serial number.  
0 to 9, reverse character 0 to 9 repeated (G, I, J, O, Q, W excepted)  
ex.) CUSTOM PRODUCTS  
MARK  
0
SERIAL  
01  
PRODUCT SERIES  
XC6221S01XM*  
③Represents output voltage  
MARK  
OUTPUT VOLTAGE (V)  
MARK  
OUTPUT VOLTAGE (V)  
0
1
2
3
4
5
6
7
8
9
A
B
C
D
E
-
-
3.1  
3.2  
3.3  
3.4  
3.5  
3.6  
3.7  
3.8  
3.9  
4.0  
4.1  
4.2  
4.3  
4.4  
4.5  
-
-
3.15  
3.25  
3.35  
3.45  
3.55  
3.65  
3.75  
3.85  
3.95  
4.05  
4.15  
4.25  
4.35  
4.45  
4.55  
F
H
K
L
1.6  
1.7  
1.8  
1.9  
2.0  
2.1  
2.2  
2.3  
2.4  
2.5  
2.6  
2.7  
2.8  
2.9  
3.0  
4.6  
1.65  
1.75  
1.85  
1.95  
2.05  
2.15  
2.25  
2.35  
2.45  
2.55  
2.65  
2.75  
2.85  
2.95  
3.05  
4.65  
4.7  
4.75  
-
-
4.8  
4.85  
-
-
4.9  
4.95  
-
-
M
N
P
R
S
T
5.0  
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
0.8  
0.9  
1.0  
1.1  
1.2  
1.3  
1.4  
1.5  
0.85  
0.95  
1.05  
1.15  
1.25  
1.35  
1.45  
1.55  
U
V
X
Y
Z
Custom products：Represents last 1 digits of registered serial number.  
0 to 9, reverse character 0 to 9 repeated (G, I, J, O, Q, W excepted)  
ex.) CUSTOM PRODUCTS  
MARK  
0
SERIAL  
01  
PRODUCT SERIES  
XC6221S01XM*  
④⑤Represents production lot number  
01, …, 09, 10, 11, …99, 0A, …,0Z, 1A, … 9Z, A0, …, Z9, AA, …, ZZ repeated.  
(G, I, J, O, Q, W excepted)  
*No character inversion used.  
21/23  
XC6221 Series  
■MARKING RULE (Continued)  
●SSOT-24  
●USPN-4  
4
3
4
3
1
2
1
2
USPN-4  
（TOP VIEW）  
SSOT-24  
(TOP VIEW)  
①Represents product series  
MARK  
OUTPUT VOLTAGE 0.1V INCREMENTS OUTPUT VOLTAGE 0.05V INCREMENTS  
PRODUCT SERIES  
VOUT =0.8～3.0V  
VOUT =3.1～4.0V  
VOUT =0.85～3.05V  
VOUT=3.15～3.95V  
9
D
F
A
C
E
H
XC6221A*****  
XC6221B*****  
B
* For the USPN-4 package, 0.8V≦VOUT(T)≦1.15V is under development.  
②Represents output voltage  
MARK  
OUTPUT VOLTAGE (V)  
MARK  
OUTPUT VOLTAGE (V)  
0
1
2
3
4
5
6
7
8
9
A
B
C
D
E
-
-
3.1  
3.2  
3.3  
3.4  
3.5  
3.6  
3.7  
3.8  
3.9  
4.0  
-
-
-
3.15  
3.25  
3.35  
3.45  
3.55  
3.65  
3.75  
3.85  
3.95  
-
F
H
K
L
1.6  
1.7  
1.8  
1.9  
2.0  
2.1  
2.2  
2.3  
2.4  
2.5  
2.6  
2.7  
2.8  
2.9  
3.0  
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
1.65  
1.75  
1.85  
1.95  
2.05  
2.15  
2.25  
2.35  
2.45  
2.55  
2.65  
2.75  
2.85  
2.95  
3.05  
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
M
N
P
R
S
T
-
-
-
-
0.8  
0.9  
1.0  
1.1  
1.2  
1.3  
1.4  
1.5  
0.85  
0.95  
1.05  
1.15  
1.25  
1.35  
1.45  
1.55  
-
U
V
X
Y
Z
-
-
-
-
-
-
-
-
③④Represents production lot number  
01, …, 09, 10, 11, …, 99, 0A, …, 0Z, 1A, …, 9Z, A0, …, Z9, AA, …, ZZ repeated.  
(G, I, J, O, Q, W excepted)  
*No character inversion used.  
22/23  
XC6221  
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.  
23/23  

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