XC6205 Series
Preliminary
CMOS Low Power Consumption
70µA
Maximum Output Current
: 150mA
Highly Accurate
:
±
2% (± 30mV less than 1.5V)
Output Voltage Range
: 0.9V ~ 1.75V (50mV Step)
High Ripple Rejection
: 60dB
Low Noise
: 30µVrms
Low ESR capacitor compatible
High Speed LDO Regulators
Low ESR Cap. Compatible, Output On/Off Control
February 07, 2003 Ver. 2
Applications
Mobile phones, Cordless phones
Wireless communication equipment
Portable games
Cameras, Video recorders
Portable AV equipment
Reference voltage
Battery powered equipment
General Description
The XC6205 series are highly precise, low noise, positive
voltage LDO regulators manufactured using CMOS processes.
The series achieves high ripple rejection and low dropout and
consists of a voltage reference, an error amplifier, a current
limiter and a phase compensation circuit plus a driver transistor.
Output voltage is selectable in 50mV increments within a range
of 0.9V ~ 1.75V.
The series is also compatible with low ESR ceramic capacitors
which give added output stability. This stability can be
maintained even during load fluctuations due to the excellent
transient response of the series.
The current limiter's foldback circuit also operates as a short
protect for the output current limiter and the output pin.
The CE function enables the output to be turned off, resulting in
greatly reduced power consumption.
Features
Maximum Output Current
Maximum Operating Voltage
Output Voltage Range
Highly Accurate
Low Power Consumption
Standby Current
Low Noise
High Ripple Rejection
Operating Temperature Range
Low ESR Capacitor Compatible
Ultra Small Packages
: 150mA
: 2.0V ~ 10V
: 0.9V~1.75V(50mV Step)
:
±2%
(V
OUT
>1.5V)
:
±30mV
(V
OUT
≤1.5V)
: TYP 70µA
: Less than 0.1µA (TYP)
: 30µVrms (TYP)
: 60dB (10kHz)
: -40
O
C ~ +85
O
C
: Ceramic capacitor
: SOT-25 (SOT-23-5)
SOT-89-5
USP-6B
Typical Application
Electrical Characteristics
Load Transient Response
XC6205B092
VIN=2V, tr=tf=5µsec
CIN=1µF(ceramic), CL=4.7µF(ceramic)
V
IN
V
OUT
V
SS
CE
NC
1.00
5
CL
2.2µF
250
Output Current (mA)
Output Voltage (V)
1
2
3
CIN
1µF
0.95
Output Voltage
200
150
100
50mA
Output Current
0.90
0.85
0.80
0.75
Time (40µsec/div)
4
1
1mA
50
0
XC6205 Series
Preliminary
Pin Assignment
SOT-25
1
2
3
4
5
PIN NUMBER
SOT-89-5 USP-6B
4
1
2
5
3
6
1
2, 4
5
3
PIN NAME
VIN
VSS
CE
NC
VOUT
FUNCTION
Input
Ground
ON/OFF Control
No Connection
Output
High Speed LDO Regulators
Low ESR Cap. Compatible, Output On/Off Control
Block Diagram
V
IN
ON/OFF
Control
each circuit
Current
Limiter
R2
CE
V
OUT
Pin Configuration
V
OUT
5
(NC)
4
VOUT VSS
2
5
VIN
4
VIN 1
NC 2
VOUT
3
R1
Voltage
Reference
6 CE
5
VSS
4
NC
V
SS
* The diode in the above diagram is for the IC's protection.
1
V
IN
2
V
SS
3
CE
1
NC
2
VSS
3
CE
SOT-25 (SOT-23-5)
(TOP VIEW)
SOT-89-5
(TOP VIEW)
USP-6B
(TOP VIEW)
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' + 300MΩ pull-down resistor built-in <between CE-V
SS
> (semi-custom)
Active 'Low' + no pull-up resistor built-in (semi-custom)
Active 'Low' + 300MΩ pull-up resistor built-in <between V
IN
-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 / 300MΩ (TYP.).
Ordering Information
XC6205123456
DESIGNATOR SYMBOL
A
B
DESCRIPTION
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 :
e.g. 1.5V =
2
: 1,
3
: 5
DESIGNATOR SYMBOL
2
DESCRIPTION
Output Voltage : 100mV Step
Accuracy : within
±2%
4
A
M
D
R
L
e.g.
2
=0,
3
=9,
4
=2
⇒
0.9V
Output Voltage : 50mV Step
Accuracy : within
±2%
1
C
D
e.g.
2
=1,
3
=3,
4
=A
⇒
1.35V
5
6
Package Type : SOT-25(SOT-23-5)
USP - 6B
Device Orientation :
Embossed Tape : Standard Feed
Embossed Tape : Reverse Feed
2
3
Integer
2
XC6205 Series
Preliminary
High Speed LDO Regulators
Low ESR Cap. Compatible, Output On/Off Control
Absolute Maximum Rating
PARAMETER
Input Voltage
Output Current
Output Voltage
CE Input Voltage
Power
Dissipation
SOT-25(SOT-23-5)
USP-6B
Topr
Tstg
SYMBOL
V
IN
I
OUT
V
OUT
V
CE
Pd
RATINGS
12
500
V
SS
-0.3 ~ V
IN
+0.3
V
SS
-0.3 ~ V
IN
+0.3
250
100
-40 ~ +85
-55 ~ +125
O
O
UNITS
V
mA
V
V
mW
C
C
Operating Ambient Temperature
Storage Temperature
Electrical Characteristics
PARAMETER
Output Voltage
Maximum Output Current
Load Regulation
Dropout Voltage
Supply Current
Standby Current
Line Regulation
Input Voltage
Output Voltage
Temperature Characteristics
Ripple Rejection Rate
Output Noise
Current Limiter
Short-circuit Current
CE "High" Voltage
CE "Low" Voltage
CE "High" Current
CE "Low" Current
NOTE
XC6205x152 (1.5V)
Ta=25
O
C
SYMBOL
V
OUT
(E)
I
OUT
MAX
∆V
OUT
Vdif1
Vdif2
I
DD
Istby
∆V
OUT /
1mA≤I
OUT
≤100mA
I
OUT
=30mA
I
OUT
=100mA
V
CE
=V
IN
V
CE
=V
SS
V
OUT
(T)+1.0V≤V
IN
≤10V
I
OUT
=30mA
2.0
I
OUT
=30mA
-40 C≤Topr≤85 C
I
OUT
=50mA, f=10kHz
300Hz ~ 50kHz
V
IN
=V
OUT
+1.5V, V
OUT
=V
SS
O
O
CONDITIONS
I
OUT
=30mA
MIN
×
0.98
1.470
150
TYP
V
OUT
(T)
1.500
15
500
600
70
0.01
0.01
MAX
×
1.02
1.530
50
UNITS
V
mA
mV
mV
mV
µA
CIRCUIT
1
1
1
1
2
2
1
-
1
4
3
1
1
2
2
2
2
0.10
0.20
10.0
µA
%/V
V
ppm/
O
C
dB
µVrms
mA
mA
∆V
IN
⋅
V
OUT
V
IN
∆V
OUT /
∆Topr ⋅
V
OUT
PSRR
en
Ilim
Ishort
V
CEH
V
CEL
I
CEH
I
CEL
100
60
30
300
50
1.60
V
IN
0.25
0.10
0.10
V
V
µA
µA
V
CE
=V
IN
V
CE
=V
SS
-0.10
-0.10
(NOTE 1) V
OUT
(T)=Specified Output Voltage
(NOTE 2) V
OUT
(E)=Effective Output Voltage
(I.e. the output voltage when "V
OUT
(T)+1.0V" is provided at the V
IN
pin while maintaining a certain I
OUT
value).
(NOTE 3) Vdif={V
IN
1
(NOTE5)
-V
OUT
1
(NOTE4)
}
(NOTE 4) VOUT 1 = A voltage equal to 98% of the Output Voltage whenever an amply stabilized IOUT {VOUT(T) + 1.0V} is input.
(NOTE 5) V
IN
1=The Input Voltage when V
OUT1
appears as Input Voltage is gradually decreased.
(NOTE 6) Unless otherwise stated, V
IN
=V
OUT
(T)+1.0V
3
XC6205 Series
Preliminary
!
Test Circuits
Circuit 1
VIN
VOUT
High Speed LDO Regulators
Low ESR Cap. Compatible, Output On/Off Control
A
CE
V
CIN=1.0µF
(ceramic)
VSS
CL=2.2µF
(ceramic)
V
RL
V
Circuit 2
A
A
VIN
VOUT
OPEN
CE
VSS
Circuit 3
VIN
VOUT
CE
CIN=1.0µF
(ceramic)
VSS
CL=2.2µF
(ceramic)
F.F.T
IOUT=10mA
Circuit 4
VIN
VIN={VOUT+1} V
DC
+0.5V
p-pAC
VOUT
IOUT=50mA
CE
V
VSS
CL=2.2µF
(ceramic)
V
4
XC6205 Series
Preliminary
High Speed LDO Regulators
Low ESR Cap. Compatible, Output On/Off Control
!
Operational Explanation
Output voltage control with the XC6205 series :
V
IN
CE
ON/OFF
Control
each circuit
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
V
OUT
pin, is then driven by the subsequent output
signal. The output voltage at the V
OUT
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.
Current
Limiter
V
OUT
R2
R1
Voltage
Reference
V
SS
Low ESR Capacitors
With the XC6205 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 (V
OUT
) and the V
SS
pin. Please use an
output capacitor with a capacitance value as shown in the figure below. Also, please connect an input capacitor
(C
IN
) of 0.1µF between the V
IN
pin and the V
SS
pin in order to ensure a stable power input.
Recommended Output Capacitor Values
VOUT
CL
0.9V ~ 1.2V
4.7µF
1.25V ~ 1.75V
2.2µF
Current Limiter, Short-Circuit Protection
The XC6205 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. However, when the input/output voltage differential is quite small, this current will be
about 200mA.
CE Pin
The IC's internal circuitry can be shutdown via the signal from the CE pin with the XC6205 series. In shutdown
mode, output at the V
OUT
pin will be pulled down to the V
SS
level via R1 & R2. The operational logic of the IC's CE
pin is selectable (please refer to the selection guide on page 2). Note that as the standard XC6205B type is ' 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 V
SS
voltage
input at the CE pin. If this IC is used with the correct specifications for the CE pin, the IC will operate normally.
However, supply current may increase as a result of through current in the IC's internal circuitry.
5
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