XC6211A3AMR [TOREX]
High Speed LDO Regulator; 高速LDO稳压器
| 型号： | XC6211A3AMR |
| 厂家： | 
Torex Semiconductor |
| 描述： | High Speed LDO Regulator |
| 文件： | 总15页 (文件大小：197K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
XC6211 Series
High Speed LDO Regulator
Low ESR Cap. Compatible, On / Off Switch
Preliminary
July 4, 2003 Ver. 3
Low Power Consumption
: 25 µA (TYP)
Applications
Mobile phones
Dropout Voltage
: 60mV (IOUT=30mA)
200mV (IOUT=100mA)
: 150 mA (VOUT < 1.7V)
240 mA ( VOUT ≥ 1.8V)
(300mA limit)
z
z
z
z
z
z
Cordless phones and radio communication equipment
Portable games
Output Current
Cameras, Video recorders
Reference Voltage Source
Battery Powered Equipment
Highly Accurate
: ±2% (±30mV when VOUT=1.5V)
: 0.9V ~ 5.0 V (50mV Step)
Output Voltage Range
Low ESR capacitor compatible
General Description
Features
The XC6211 series are highly accurate, low noise, CMOS LDO
Voltage Regulators. Offering low output noise, high ripple rejection
ratio, low dropout and very fast turn-on times, the XC6211 series
is ideal for today’s cutting edge mobile phone.
Maximum Output Current
: 150 mA (VOUT < 1.7V)
240 mA ( VOUT ≥ 1.8V)
(300mA limit)
Internally the XC6211 includes a reference voltage source, error
amplifiers, driver transistors, current limiters and phase
compensators. The XC6211’s current limiters' foldback circuit also
operates as a short protect for the output current limiter and the
output pin.
The output voltage is set by laser trimming. Voltages are
selectable in 50mV steps within a range of 0.9V to 5.0V. The
XC6211 series is also fully compatible with low ESR ceramic
capacitors, reducing cost and improving output stability. This
high level of output stability is maintained even during frequent
load fluctuations, due to the excellent transient response
performance and high PSRR achieved across a broad range of
frequencies.
Dropout Voltage
: 200mV (IOUT=100mA)
: 2.0V ~ 6.0V
Operating Voltage Range
Output Voltage Range
Highly Accurate
: 0.9V ~ 5.0V (50mV Step)
: ±2% (VOUT>1.5V)
: ±30mV (VOUT≤1.5V)
: 25 µA (TYP.)
Low Power Consumption
Standby Current
: Less than 0.1µA (TYP.)
: 65dB (10kHz)
High Ripple Rejection
O
O
Operating Temperature Range
Low ESR Capacitor Compatible
Ultra Small Packages
: -40 C ~ +85 C
: Ceramic capacitor
: SOT-23-5
The CE function allows the output of regulator to be turned off,
resulting in greatly reduced power consumption.
The XC6211 series is available in the SOT-23-5 package.
Typical Applications
CE
VIN
1
2
3
5
4
VSS
NC VOUT
CIN
1µF
CL
1µF
1
XC6211 Series
High Speed LDO Regulator
Low ESR Cap. Compatible, On / Off Switch
Preliminary
Pin Configuration
Pin Assignment
VIN
5
VOUT
PIN NUMBER
4
PIN NAME
FUNCTION
SOT-25
1
CE
VSS
NC
On/Off Control 1
Ground
2
3
4
5
No Connection
Output 1
2
3
1
VOUT1
VIN
CE
VSS
NC
Power Input
SOT-23-5
(TOP VIEW)
Block Diagram
VIN
CE
ON/OFF
Control
each circuit
Current
Limit
VOUT
VSS
R2
R1
Voltage
Reference
2
XC6211 Series
High Speed LDO Regulator
Low ESR Cap. Compatible, On / Off Switch
Preliminary
Product Classification
z Selection Guide
The following options for the CE pin logic and internal pull-up/down are available:
Active 'High' + no pull-down resistor built-in (standard)
Active 'High' + 2.0MΩ pull-down resistor built-in <between CE-VSS> (semi-custom)
Active 'Low' + no pull-up resistor built-in (semi-custom)
Active 'Low' + 2.0MΩ pull-up resistor built-in <between VIN-CE> (semi-custom)
Note: *With the pull-up resistor or pull-down resistor built-in types,
the supply current during operation will increase by VIN / 2.0MΩ (TYP.)
z Ordering Information XC6211123456
DESIGNATOR
SYMBOL
DESCRIPTION
CE Pin Logic :
Active 'High' (pull-down resistor built in)
Active 'High' (no pull-down resistor built in)
Active 'Low' (pull-up resistor built in)
Active 'Low' (no pull-up resistor built in)
Output Voltage :
A
B
1
C
D
Integer
2 3
4
e.g. 2=3, 3=0, ⇒ 3.0V
Output Voltage: 100mV increments, ±2% accuracy
e.g. 2=2, 3=8, 4=2 ⇒ 2.80V, ±2%
2
Output Voltage : 50mV increments, ±2% accuracy
e.g. 2=2, 3=8, 4=A ⇒ 2.85V
Package Type :
A
5
6
M
SOT-25 (SOT-23-5)
Device Orientation :
R
L
Embossed Tape : Standard Feed
Embossed Tape : Reverse Feed
Absolute Maximum Rating
O
Ta = 25 C
PARAMETER
Input Voltage
Output Current
Output Voltage
SYMBOL
VIN
RATINGS
7.0
UNITS
V
mA
V
IOUT
VOUT
500
VSS -0.3 ~ VIN +0.3
VSS -0.3 ~ VIN +0.3
CE Pin Voltage
VCE
Pd
V
Power Dissipation
mW
250
OC
OC
Operating Ambient Temperature
Storage Temperature
Topr
Tstg
-40 ~ +85
-55 ~ +125
3
XC6211 Series
High Speed LDO Regulator
Low ESR Cap. Compatible, On / Off Switch
Preliminary
Electrical Characteristics XC6211B Series
O
Ta=25 C
UNITS
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
CIRCUIT
Output Voltage
Maximum Output Current
Load Regulation
VOUT (E)
IOUTMAX
∆VOUT
Vdif1
VOUT(T)
× 0.98
× 1.02
IOUT=30mA
* 1
V
1
1
1
150
mA
mV
mV
1mA≤IOUT≤100mA
IOUT=30mA
15
50
E-1
Dropout Voltage
1
Vdif2
E-2
25
IOUT=100mA
mV
Supply Current
Standby Current
IDD
50
2
2
µA
VCE=VIN
Istby
VCE=VSS
µA
% / V
V
0.01
0.01
0.10
∆VOUT /
∆VIN ⋅ VOUT
VIN
VOUT(T)+1.0V≤VIN≤7.0V
IOUT=30mA
Line Regulation
0.20
6.0
1
-
Input Voltage
Output Voltage
2.0
∆VOUT /
∆Topr ⋅ VOUT
PSRR
IOUT=30mA
-40OC≤Topr≤85OC
ppm/
OC
100
1
4
Temperature Characteristics
Ripple Rejection Rate
Current Limiter
dB
IOUT=50mA, f=10kHz
65
300
50
Ilim
mA
mA
V
1
1
1
2
2
2
Short-circuit Current
EN "High" Voltage
EN "Low" Voltage
EN "High" Current
EN "Low" Current
Ishort
VCEH
1.60
VIN
0.25
0.10
0.10
VCEL
V
ICEH
µA
µA
VCE=VIN
VCE=VSS
-0.10
-0.10
ICEL
NOTE
*1 : 150mA (VOUT<1.7V), 240mA (VOUT≥1.8V)
(NOTE 1) VOUT(T)=Specified Output Voltage
(NOTE 2) VOUT(E)=Effective Output Voltage
(I.e. the output voltage when "VOUT(T)+1.0V" is provided at the VIN pin while maintaining a certain IOUT value).
(NOTE 3) Vdif={VIN1(NOTE5)-VOUT1(NOTE4)}
(NOTE 4) VOUT1=A voltage equal to 98% of the Output Voltage whenever an amply stabilized IOUT {VOUT(T)+1.0V} is input.
(NOTE 5) VIN1=The Input Voltage when VOUT1 appears as Input Voltage is gradually decreased.
(NOTE 6) Unless otherwise stated, VIN=VOUT(T)+1.0V
Dropout Voltage
E-1
E-2
SYMBOL
PARAMETER
Vdif 1
Vdif 2
MIN
TYP
MAX
MIN
TYP
MAX
OUTPUT VOLTAGE
0.90
1100
1100
500
200
120
80
1110
510
210
150
120
120
120
100
100
90
1100
1150
550
300
280
240
240
240
220
220
200
200
180
160
1200
600
400
380
350
330
310
290
270
270
250
230
210
1.50
500
500
1.80 ~ 1.85
1.90 ~ 1.95
2.00 ~ 2.05
2.10 ~ 2.25
2.30 ~ 2.45
2.50 ~ 2.75
2.80 ~ 2.95
3.00 ~ 3.05
3.10 ~ 3.95
4.00 ~ 4.95
5.00
200
200
100
100
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
80
80
70
70
60
60
90
60
80
50
70
* The input voltage 2.0V (Min.) is needed to operate the series. When the output voltage is less than 2.0V,
2.0V-VOUT(T) of dropout voltage is needed at minimum.
4
XC6211 Series
High Speed LDO Regulator
Low ESR Cap. Compatible, On / Off Switch
Preliminary
Test Circuits
Circuit 1
VIN
CE
VOUT
VOUT
VOUT
A
CL=1.0µF
(ceramic)
CIN=1.0µF
(ceramic)
VSS
VSS
VSS
RL
V
V
V
Circuit 2
Circuit 3
Circuit 4
VIN
CE
A
OPEN
A
VIN
CE
CIN=1.0µF
(ceramic)
CL=1.0µF
(ceramic)
F.F.T
IOUT=10mA
VIN
CE
VOUT
IOUT=50mA
CL=1.0µF
(ceramic)
VSS
V
V
VIN={VOUT+1}VDC
+0.5Vp-pAC
5
XC6211 Series
High Speed LDO Regulator
Low ESR Cap. Compatible, On / Off Switch
Preliminary
Operational Explanation
Output voltage control with the XC6211 series:
The voltage divided by resistors R1 & R2 is compared with the internal reference voltage by the error amplifier. The P-Channel
MOSFET, which is 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 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.
VIN
CE
ON/OFF
each circuit
Control
Current
Limit
VOUT
R2
R1
VSS
Voltage
Reference
Low ESR Capacitors
With the XC6211 series, a stable output voltage is achievable even if used with low ESR capacitors as a phase
compensation circuit is built-in. In order to ensure the effectiveness of the phase compensation, we suggest that an
output capacitor (CL) is connected as close as possible to the output pin (VOUT) and the VSS pin. Please use an
output capacitor with a capacitance value of at least 1µF. Also, please connect an input capacitor (CIN) of 0.1µF
between the VIN pin and the VSS pin in order to ensure a stable power input.
Current Limiter, Short-Circuit Protection
The XC6211 series includes a combination of a fixed current limiter circuit & a foldback circuit which aid the
operations of the current limiter and circuit protection. When the load current reaches the current limit level, the
fixed current limiter circuit operates and output voltage drops. As a result of this drop in output voltage, the foldback
circuit operates, output voltage drops further and output current decreases. When the output pin is shorted, a
current of about 50mA flows.
CE Pin
The IC's internal circuitry can be shutdown via the signal from the CE pin with the XC6211 series. In shutdown
mode, output at the VOUT pin will be pulled down to the VSS level via R1 & R2. The operational logic of the IC's CE
pin is selectable (please refer to the selection guide on page 3). Note that as the standard XC6211B type's
regulator 1 and 2 are both ' High Active/No Pull Down', operations will become unstable with the CE pin open.
Although the CE pin is equal to an inverter input with CMOS hysteresis, with either the pull-up or pull-down options,
the CE pin input current will increase when the IC is in operation. We suggest that you use this IC with either a VIN
voltage or a VSS voltage input at the CE pin. If this IC is used with the correct specifications for the CE pin, the
operational logic is fixed and the IC will operate normally. However, supply current may increase as a result of
through current in the IC's internal circuitry.
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 keep the resistance low between VIN and VSS wiring in particular.
3 Please wire the input capacitor (CIN) and the output capacitor (CL) as close to the IC as possible.
6
High Speed LDO Regulator
XC6211 Series
Low ESR Cap. Compatible, On / Off Switch
Preliminary
! Typical Performance Characteristics
(1) Output Voltage vs. Output Current
XC6211x182
XC6211x182
VIN=2.8V,
CIN=1µF(ceramics), CL=1µF(ceramics)
2.0
CIN=1µF(Ceramic), CL=1µF(ceramic)
2.0
1.5
1.0
0.5
0.0
VIN=2.8V
1.5
VIN=4.8V
1.0
VIN=3.8V
Topr = 85OC
25OC
0.5
VIN=2.1V
- 40OC
0.0
0
50 100 150 200 250 300 350 400
Output Current IOUT (mA)
0
50 100 150 200 250 300 350 400
Output Current IOUT (mA)
XC6211x252
XC6211x252
VIN=3.5V
CIN=1µF(ceramics), CL=1µF(ceramics)
VIN=4.5V
CIN=1µF(ceramics), CL=1µF(ceramics)
3.0
2.5
2.0
1.5
1.0
0.5
0.0
3.0
2.5
2.0
1.5
1.0
0.5
0.0
VIN=5.5V
Topr = 85OC
25OC
VIN=3.5V
VIN=2.8V
- 40OC
0
50 100 150 200 250 300 350 400
Output Current IOUT (mA)
0
50 100 150 200 250 300 350 400
Output Current IOUT (mA)
XC6211x302
VIN=4.0V,
CIN=1µF(ceramic), CL=1µF(ceramic)
XC6211x302
CIN=1µF(ceramic), CL=1µF(ceramic)
VIN=4V
4.0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0.0
4.0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0.0
VIN=5V
VIN=6V
Topr = 85OC
25OC
VIN=3.3V
- 40OC
0
50 100 150 200 250 300 350 400
Output Current IOUT (mA)
0
50 100 150 200 250 300 350 400
Output Current IOUT (mA)
7
High Speed LDO Regulator
XC6211 Series
Low ESR Cap. Compatible, On / Off Switch
Preliminary
(2) Output Voltage vs. Input Voltage
XC6211x182
XC6211x182
Topr=250C,
Topr=25OC,
CIN=1uF (ceramics), CL=1uF(ceramics)
CIN=1uF (ceramics), CL=1uF(ceramics)
1.90
2.0
1.8
1.6
1.4
1.2
1.0
1.85
1.80
1.75
IOUT=0mA
=1mA
=30mA
=100mA
IOUT=0mA
1.70
=1mA
=30mA
1.65
3.0
4.0
5.0
6.0
1.3
1.8
2.3
Input Voltage VIN (V)
Input Voltage VIN (V)
XC6211x252
XC6211x252
Topr=25OC,
Topr=25OC,
CIN=1uF (ceramics), CL=1uF(ceramics)
CIN=1uF (ceramics), CL=1uF(ceramics)
2.60
2.7
2.5
2.3
2.1
1.9
1.7
2.55
2.50
2.45
2.40
2.35
IOUT=0mA
=1mA
=30mA
=100mA
IOUT=0mA
=1mA
=30mA
3.0
3.5
4.0
4.5
5.0
5.5
6.0
2
2.5
3
Input Voltage VIN (V)
Input Voltage VIN (V)
XC6211x302
XC6211x302
Topr=25OC,
Topr=25OC,
CIN=1uF (ceramics), CL=1uF(ceramics)
CIN=1uF (ceramics), CL=1uF(ceramics)
3.2
3.0
2.8
2.6
2.4
2.2
3.10
3.05
3.00
2.95
2.90
2.85
IOUT = 0mA
= 1mA
IOUT = 0mA
= 1mA
= 30mA
= 100mA
= 30mA
2.5
3
3.5
4.0
4.5
5.0
5.5
6.0
Input Voltage VIN (V)
Input Voltage VIN (V)
8
High Speed LDO Regulator
XC6211 Series
Low ESR Cap. Compatible, On / Off Switch
Preliminary
(3) Dropout Voltage vs. Output Current
XC6211x252
XC6211x182
CIN=1uF (ceramics), CL=1uF(ceramics)
1.0
CIN=1uF (ceramics), CL=1uF(ceramics)
1.0
0.8
0.8
Topr= 85OC
= 25OC
Topr= 85OC
0.6
0.6
= -40OC
= 25OC
= -40OC
0.4
0.2
0.0
0.4
0.2
0.0
0
40
80
120
160
200
0
40
80
120
160
200
Output Current IOUT (mA)
Output Current IOUT (mA)
XC6211x302
CIN=1uF (ceramics), CL=1uF(ceramics)
1.0
0.8
0.6
0.4
0.2
0.0
Topr= 85OC
= 25OC
= -40OC
0
40
80
120
160
200
Output Current IOUT (mA)
(4) Supply Current vs. Input Voltage
XC6211x182
XC6211x252
50.0
40.0
30.0
20.0
50.0
40.0
30.0
20.0
10.0
0.0
Topr= 85OC
Topr= 85OC
= 25OC
= 25OC
10.0
0.0
= -40OC
= -40OC
0
1
2
3
4
5
6
0
1
2
3
4
5
6
Input Voltage VIN (V)
Input Voltage VIN (V)
9
High Speed LDO Regulator
XC6211 Series
Low ESR Cap. Compatible, On / Off Switch
Preliminary
(4) Supply Current vs. Input Voltage (Continued)
XC6211x302
50.0
40.0
30.0
20.0
Topr= 85OC
= 25OC
10.0
= -40OC
0.0
0
1
2
3
4
5
6
Input Voltage VIN (V)
(5) Output Voltage vs. Ambient Temperature
XC6211x252
XC6211x182
VIN=3.2V
VIN=2.8V
CIN=1uF (ceramics), CL=1uF(ceramics)
CIN=1uF (ceramics), CL=1uF(ceramics)
2.60
1.90
1.85
1.80
1.75
1.70
1.65
1.60
2.55
2.50
2.45
IOUT = 0mA
2.40
IOUT = 0mA
1mA
1mA
30mA
100mA
30mA
100mA
2.35
2.30
-40 -20
0
20 40 60 80 100
-40 -20
0
20 40 60 80 100
Ambient Temperature Topr (OC)
Ambient Temperature Topr (OC)
XC6211x302
VIN=4.0V
CIN=1uF (ceramics), CL=1uF(ceramics)
3.10
3.05
3.00
2.95
2.90
2.85
2.80
IOUT = 0mA
1mA
30mA
100mA
-40 -20
0
20 40 60 80 100
Ambient Temperature Topr (OC)
10
High Speed LDO Regulator
XC6211 Series
Low ESR Cap. Compatible, On / Off Switch
Preliminary
(6) Supply Current vs. Ambient Temperature
XC6211x252
XC6211x182
VIN=3.5V
VIN=2.8V
50.0
50.0
40.0
30.0
20.0
10.0
0.0
40.0
30.0
20.0
10.0
0.0
-40 -20
0
20
40
60
80 100
Ambient Temperature Topr (OC)
-40 -20
0
20
40
60
80 100
Ambient Temperature Topr (OC)
XC6211x302
VIN=4.0V
50.0
40.0
30.0
20.0
10.0
0.0
-40 -20
0
20 40 60 80 100
Ambient Temperature Topr (OC)
11
High Speed LDO Regulator
XC6211 Series
Low ESR Cap. Compatible, On / Off Switch
Preliminary
(7) Input Transient Response
XC6211x182
XC6211x182
tr = tf = 5use,
CL=1uF (ceramics), IOUT=10mA
tr = tf = 5use,
CL=1uF (ceramics), IOUT=1mA
5
4
1.88
1.86
1.84
1.82
1.80
1.78
1.76
5
4
1.88
1.86
1.84
1.82
1.80
1.78
1.76
Input Voltage
Input Voltage
3
3
2
2
1
1
Output Voltage
0
0
Output Voltage
-1
-1
Time (40usec/div)
Time (40usec/div)
XC6211x252
XC6211x182
tr = tf = 5use,
CL=1uF (ceramics), IOUT=1mA
tr = tf = 5use,
CL=1uF (ceramics), IOUT=100mA
5
4
2.58
2.56
2.54
2.52
2.50
2.48
2.46
5
4
1.88
1.86
1.84
1.82
1.80
1.78
1.76
Input Voltage
Input Voltage
3
3
2
2
1
1
Output Voltage
0
Output Voltage
0
-1
-1
Time (40usec/div)
Time (40usec/div)
XC6211x252
XC6211x252
tr = tf = 5use,
tr = tf = 5use,
CL=1uF (ceramics), IOUT=10mA
CL=1uF (ceramics), IOUT=100mA
5
4
2.58
2.56
2.54
2.52
2.50
2.48
2.46
5
4
2.58
2.56
2.54
2.52
2.50
2.48
2.46
Input Voltage
Input Voltage
3
3
2
2
1
1
Output Voltage
0
0
Output Voltage
-1
-1
Time (40usec/div)
Time (40usec/div)
12
High Speed LDO Regulator
XC6211 Series
Low ESR Cap. Compatible, On / Off Switch
Preliminary
(7) Input Transient Response (Continued)
XC6211x302
XC6211x302
tr = tf = 5use,
tr = tf = 5use,
CL=1uF (ceramics), IOUT=1mA
CL=1uF (ceramics), IOUT=10mA
6
5
4
3
2
1
0
3.08
6
5
4
3
2
1
0
3.08
3.06
3.04
3.02
3.00
2.98
2.96
3.06
3.04
3.02
3.00
2.98
2.96
Input Voltage
Input Voltage
Output Voltage
Output Voltage
Time (40usec/div)
Time (40usec/div)
XC6211x302
tr = tf = 5use,
CL=1uF (ceramics), IOUT=100mA
6
3.08
3.06
3.04
3.02
3.00
2.98
2.96
5
4
3
2
1
0
Input Voltage
Output Voltage
Time (40usec/div)
(8) Load Transient Response
XC6211x182
XC6211x182
VIN=2.8V, tr = tf = 5use,
VIN=2.8V, tr = tf = 5use,
CIN=1uF (ceramics), CL=1uF (ceramics)
CIN=1uF (ceramics), CL=1uF (ceramics)
2.0
1.9
1.8
1.7
1.6
1.5
1.4
300
250
200
150
100
50
2.0
300
250
200
150
100
50
1.9
1.8
1.7
1.6
1.5
1.4
Output Voltage
Output Voltage
Output Current
100mA
Output Current
50mA
50mA
10mA
0
0
Time (40usec/div)
Time (40usec/div)
13
High Speed LDO Regulator
XC6211 Series
Low ESR Cap. Compatible, On / Off Switch
Preliminary
(8) Load Transient Response (Continued)
XC6211x252
VIN=3.5V, tr = tf = 5use,
XC6211x182
VIN=2.8V, tr = tf = 5use,
CIN=1uF (ceramics), CL=1uF (ceramics)
CIN=1uF (ceramics), CL=1uF (ceramics)
2.7
2.6
2.5
2.4
2.3
2.2
2.1
300
250
200
150
100
50
2.0
1.9
1.8
1.7
1.6
1.5
1.4
300
250
200
150
100
50
Output Voltage
Output Current
Output Voltage
100mA
10mA
Output Current
50mA
10mA
0
0
Time (40usec/div)
Time (40usec/div)
XC6211x252
VIN=3.5V, tr = tf = 5use,
VIN=3.5V, tr = tf = 5use,
CIN=1uF (ceramics), CL=1uF (ceramics)
CIN=1uF (ceramics), CL=1uF (ceramics)
2.7
2.6
2.5
2.4
2.3
2.2
2.1
300
250
200
150
100
50
2.7
300
250
200
150
100
50
2.6
2.5
2.4
2.3
2.2
2.1
Output Voltage
Output Voltage
Output Current
100mA
Output Current
100mA
50mA
10mA
0
0
Time (40usec/div)
Time (40usec/div)
VIN=4.0V, tr = tf = 5use,
VIN=4.0V, tr = tf = 5use,
CIN=1uF (ceramics), CL=1uF (ceramics)
CIN=1uF (ceramics), CL=1uF (ceramics)
3.2
3.1
3.0
2.9
2.8
2.7
2.6
300
250
200
150
100
50
3.2
3.1
3.0
2.9
2.8
2.7
2.6
300
250
200
150
100
50
Output Voltage
Output Voltage
Output Current
100mA
50mA
Output Current
50mA
10mA
0
0
Time (40usec/div)
Time (40usec/div)
14
High Speed LDO Regulator
XC6211 Series
Low ESR Cap. Compatible, On / Off Switch
Preliminary
(8) Load Transient Response (Continued)
XC6211x302
VIN=4.0V, tr = tf = 5use,
CIN=1uF (ceramics), CL=1uF (ceramics)
3.2
300
250
200
150
100
50
3.1
Output Voltage
3.0
2.9
Output Current
2.8
2.7
2.6
100mA
10mA
0
Time (40usec/div)
(9) Ripple Rejection Rate
XC6211x252
XC6211x182
VIN=3.5V, DC + Vp-pAC,
VIN=2.8V, DC + Vp-pAC,
IOUT=50mA, CL=1uF (ceramics)
IOUT=50mA, CL=1uF (ceramics)
100
100
90
80
70
60
50
40
30
20
10
0
90
80
70
60
50
40
30
20
10
0
0.01
0.1
1
10
100
0.01
0.1
1
10
100
Ripple Frequency f (kHz)
Ripple Frequency f (kHz)
XC6211x302
VIN=3.0V, DC + Vp-pAC,
IOUT=50mA, CL=1uF (ceramics)
100
90
80
70
60
50
40
30
20
10
0
0.01
0.1
1
10
100
Ripple Frequency f (kHz)
15
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