■
■
XC6603 Series
ETR03070-001
1A, 0.5V Low Input Voltage, High Speed LDO Regulator
（Adjustable Soft-start time with an external component）
GENERAL DESCRIPTION
The XC6603 series is a low voltage input (0.5V) operation and provides high accuracy ±15mV / ±20mV and can supply large
current efficiently due to its ultra low on-resistance even at low output voltages.
The series is ideally suited to the applications which require high current in low input/output voltages and consists of a N-ch
driver transistor, a voltage reference, an error amplifier, a current limiter, a foldback circuit, a thermal shutdown (TSD) circuit, an
under voltage lock out (UVLO) circuit, a soft-start circuit and a phase compensation circuit.
Output voltage is selectable in 0.1V increments within a range of 0.5V to 1.8V using laser trimming technology and ceramic
capacitors can be used for the output stabilization capacitor (C
start-up can be reduced and makes the V
The inrush current conflicts with the soft-start time, therefore if soft-start is set longer, the inrush current is decreased.
The CE function enables the output to be turned off and the series to be put in stand-by mode resulting in greatly reduced
power consumption. At the time of entering the stand-by mode, the series enables the electric charge at the output capacitor
) to be discharged via the internal switch. As a result the V
(C
L
The CE pull-down function keeps the IC to be in stand-by mode even if the CE pin is left open.
■APPLICATIONS
● Mobile phones / Smart Phones
● Digital still cameras / Video cameras
● Note PCs / Tablet PCs
● E-book Readers
● Wireless LAN
■TYPICAL APPLICATION CIRCUIT
stable. Soft-start time can be adjustable with connecting a capacitor to the SS pin.
IN
). The inrush current (I
L
pin quickly returns to the VSS level.
OUT
) from VIN to V
RUSH
OUT
FEATURES
Maximum Output Current
ON Resistance
Bias Voltage Range
Input Voltage Range
Output Voltage Range
Output Voltage Accuracy
±0.020V＠V
Ripple Rejection
75dB＠f=1kHz (V
Low Power Consumption
Stand-by Current
Under-voltage Lockout
Thermal Shutdown
Protection Circuit
Function
Output Capacitor
Operating Ambient Temperature
Packages
Environmentally Friendly
1A (1.3A Limit)
:
: 0.15Ω＠V
: 2.5V～6.0V
: 0.5V～3.0V
: 0.5V～1.8V (0.1V increments)
: ±0.015V＠V
: 60dB＠f=1kHz (V
: 100μA (V
: 0.01μA (V
1.8V (V
:
: 150℃＠detect, 125℃＠release
Foldback Current Limit, TSD, UVLO
:
Adjustable Soft-start time with an external component
:
CE Pull-Down (Active High)
C
: Ceramic Capacitor Compatible (2.2μF)
: -40℃～+85℃
USP-6C, SOT-26W
:
EU RoHS Compliant, Pb Free
:
BIAS
BIAS
Auto Discharge
L
■TYPICAL PERFORMANCE
CHARACTERISTICS
4
(V)
2
CE
0
-2
XC6603A121xR-G
V
=3.6V, VCE=0V→3.6V(tr=5μs), VIN=1.5V
BIAS
I
=100mA, C
OUT
BIAS=CIN
=1.0μF, CL=2.2μF, Ta=25℃
CE Input Voltage
Output Voltage
for charging CL at
=3.6V, V
＜1.2V
OUT
≧1.2V
OUT
), 6.5μA (VIN)＠V
BIAS
), 0.01μA (VIN)
BIAS
), 0.4V (VIN)
OUT
BIAS_PSRR
IN_PSRR
4
3
2
1
=1.2V
)
)
(V)
OUT
OUT
=1.2V
-4
CE Input Voltage: V
-6
Time (1ms/ div)
0
-1
Output Voltage: V
1/29
XC6603 Series
■BLOCK DIAGRAMS
Type A
■PRODUCT CLASSIFICATION
●Ordering Information
XC6603①②③④⑤⑥-⑦
DESIGNATOR ITEM SYMBOL DESCRIPTION
①
②③
④
⑤⑥-⑦
(*1)
The “-G” suffix denotes Halogen and Antimony free as well as being fully RoHS compliant.
(*1)
Output Voltage Accuracy 1
Packages (Order Unit)
●Selection Guide
TYPE SOFT-START
A Adjustable Yes Yes Yes Yes Yes
Type A Refer to Selection Guide
Output Voltage
05～18 e.g. 1.2V → ②=1, ③=2
±0.015V (V
OUT
ER-G USP-6C (3,000/Reel)
MR-G SOT-26W (3,000/Reel)
CURRENT
LIMITTER
THERMAL
SHUTDOWN
UVLO
CE PULL-DOWN
RESISTOR
＜1.2V)、±0.020V (V
CL AUTO DISCHARGE
OUT
≧1.2V)
2/29
XC6603
Series
■PIN CONFIGURATION
*The dissipation pad for the USP-6C package should be solder-plated in recommended mount pattern and metal masking so as to enhance
mounting strength and heat release. If the pad needs to be connected to other pins, it should be connected to the V
(No. 2) pin.
SS
■PIN ASSIGNMENT
PIN NUMBER
PIN NAME FUNCTIONS
USP-6C SOT-26W
1 6 V
Power Supply Input
BIAS
3 4 VIN Driver Transistor Input
4 3 V
Output
OUT
5 2 SS Soft-Start Capacitor Connection
2 5 VSS Ground
6 1 CE ON/OFF Control
■FUNCTION CHART
PIN NAME SIGNAL STATUS
L Stand-by
CE
H Active
OPEN Stand-by
3/29
XC6603 Series
■ABSOLUTE MAXIMUM RATINGS
PARAMETER SYMBOL RATINGS UNITS
Ta =2 5℃
Bias Voltage V
Input Voltage VIN
Output Current I
Output Voltage
(*2)
V
CE Input Voltage VCE
SS Pin Voltage
(*3)
SS
USP-6C
Power Dissipation
SOT-26W
Operating Ambient Temperature Topr
Storage Temperature Tstg
* All voltages are described based on the VSS pin.
(*1) I
≦Pd/（VIN-V
OUT
(*2) The maximum value should be either V
(*3) The maximum value should be either V
(*4) The power dissipation measured with the test board condition is listed as reference data.
Please refer to page 25〜26 for details.
OUT
）
BIAS
BIAS
BIAS
-0.3～+6.5
-0.3～+6.5
OUT
OUT
-0.3～V
-0.3～VIN+0.3 or +6.5
（*1）
1.65
+0.3 or +6.5
BIAS
-0.3～+6.5
Pd
-0.3～V
1000 (PCB mounted)
+0.3 or +6.5
BIAS
120
250
600 (PCB mounted)
-40～+85 ℃
-55～+125 ℃
+0.3, VIN+0.3 or +6.5 in the lowest.
+0.3 or +6.5 in the lowest.
(*4)
(*4)
V
V
A
V
V
V
mW
4/29
■ELECTRICAL CHARACTERISTICS
PARAMETER SYMBOL CONDITIONS MIN. TYP. MAX. UNITS CIRCUIT
Bias Voltage V
Input Voltage V
Output Voltage V
(*3
Maximum Output Current
)
I
Load Regulation ΔV
Dropout Voltage Vdif
Supply Current 1
(*6)
I
Supply Current 2 IIN I
Stand-by Current 1 I
Stand-by Current 2 I
Bias Line Regulation
Input Line Regulation
Bias UVLO Voltage V
Bias UVLO Release Voltage
Input UVLO Voltage VIN_
Input UVLO Release Voltage
Output Voltage
Temperature Characteristics
Bias Ripple Rejection R
atio V
Input Ripple Rejection Ratio
Current Limit
(*3)
I
Short - Circuit Current I
Thermal Shutdown
Detect Temperature
Thermal Shutdown
Release Temperature
Thermal Shutdown
Hysteresis Width
CL Auto-Discharge Resistance
CE "H" Level Voltage V
CE "L" Level Voltage V
CE "H" Level Current I
CE "L" Level Current I
SS Pin Current Isoft SS Pin=V
Soft-Start
Threshold Voltage
NOTE:
Unless otherwise stated, V
(*1) V
(*2) V
(*3) Mount conditions affect heat dissipation. Maximum output current is not guaranteed when TSD starts to operate earlier.
(*4) Vdif＝{V
(*5) Please refer to the table E-1 named DROPOUT VOLTAGE CHART
(*6) Supply current 1 (I
(*7) Design value
= Effective output voltage
OUT(E)
= Nominal output voltage
OUT(T)
IN1－VOUT1
is an input voltage when V
V
IN1
V
is a voltage equal to 98% of the output voltage where V
OUT1
(*7)
BIAS=VCE
}
) may be fluctuated because that some bias current flows into the output.
BIAS
2.5 - 6.0 V ①
BIAS
0.5 - 3.0 V ①
IN
V
＜1.2V -0.015 +0.015
(*1)
I
OUT(E)
OUTMAX
1mA≦I
OUT
(*4)
I
I
BIAS
V
BIAS_STB
V
IN_STB
ΔV
/
OUT
(ΔV
・
V
BIAS
OUT
ΔV
/
OUT
(ΔVIN・
V
）
OUT
BIAS_UVLOD
V
BIAS_UVLOR
UVLOD
VIN_
UVLOR
ΔV
/
OUT
・
V
(ΔTopr
OUT
BIAS_PSRR
V
IN_PSRR
V
LIM
V
SHORT
T
Junction Temperature - 150 - ℃ ①
TSD
T
Junction Temperature - 125 - ℃ ①
TSR
T
TSD-TTSR
R
VCE=VSS, V
DCHG
0.65 - 6.00 V ④
CEH
V
CEL
V
CEH
V
CEL
=100mA
OUT
V
＜1.2V, V
OUT（T)
V
≧1.2V, V
OUT（T)
=0A
OUT
=6.0V, VIN=3.0V, VCE=VSS - 0.01 0.10 μA ②
BIAS
=6.0V, VIN=3.0V, VCE=VSS - 0.01 0.15 μA ②
BIAS
V
＜
1.2V, VCE=V
OUT(T)
）
V
≧
1.2V, VCE=V
OUT（T)
V
OUT（T)
V
2.5 - 6.0 V ①
V
0.5 - 3.0 V ①
）
-40℃≦Topr≦85℃
V
BIAS=VCE
I
=100mA, f=1kHz, C
OUT
VIN=V
OUT(T)
I
=100mA, f=1kHz, CIN=OPEN
OUT
={V
OUT
Junction Temperature - 25 - ℃ ①
BIAS=VCE
BIAS
OUT(T)
V
≧1.2V -0.020
OUT(T)
=2.5V
BIAS=VCE
BIAS=VCE=VOUT(T)
≦1A - 37 68 mV ①
OUT
=1A - E-1
OUT
=0A 76 100 143 μA ②
OUT
V
OUT(T)
V
OUT(T)
, 2.5V
BIAS
, V
BIAS
OUT(T)
+1.3V
＜1.2V 0.1 - 8.7
≧1.2V 3.9 - 14.2
≦V
≦
6.0V
BIAS
+1.3V
≦V
≦
6.0V
BIAS
1.0 - - A ①
- 0.01 0.10 %/V ①
V
OUT(T)
(*2)
+0.020
(*5)
mV ①
+0.1V≦VIN≦3.0V - 0.01 0.10 %/V ①
- 1.28 V ①
SS
- 0.23 V ①
SS
I
=100mA
OUT
=3.6VDC+0.2V
+0.3VDC+0.2V
OUT@IOUT
=1A}×0.95 1.0 1.3 - A ①
- 90 - mA ①
OUT=VSS
OUT=VOUT(T)
p-pAC
=OPEN
BIAS
p-pAC
130 190 255 Ω ①
- ±30 - ppm/℃ ①
- 60 - dB ③
- 75 - dB ③
- 0.41 V ④
SS
=6.0V 3.2 6.0 10.6 μA ④
=6.0V,VCE=V
-0.1 - 0.1 μA ④
SS
3.60 5.00 6.55 μA ⑤
SS
Vsoft (0.927) (1.085) (1.243) V -
=3.6V, VIN=V
appears at the output during decreasing input voltage gradually.
OUT1
OUT(T)
+0.3V, I
=1mA, C
OUT
BIAS=CIN
BIAS=VCE
=1.0μF, CL=2.2μF, SS Pin=OPEN
=3.6 and VIN=V
OUT(T)
+0.3V at I
=1A is input to the VIN pin.
OUT
XC6603
Series
Ta =2 5 ℃
V ①
μA ②
5/29
XC6603 Series
■ELECTRICAL CHARACTERISTICS (Continued)
●Dropout Voltage Chart
E-1
NOMINAL
OUTPUT
VOLTAGE
V
OUT(T)
0.5 2.5 152 218 2.8 3.1 3.7 4.5
0.6 2.4 2.7 3.0 3.6 4.4
0.7 2.3
0.8 2.2 158 228 2.5 152 218 2.8 3.4 4.2
0.9 2.1 162 233 2.4 2.7 3.3
1.0 2.0 165 238 2.3
1.1 1.9 167 243 2.2 158 228 2.5 152 218 3.1 3.9
1.2 1.8 169 253 2.1 162 233 2.4 3.0 3.8
1.3 1.7 179 268 2.0 165 238 2.3
1.4 1.6 189 283 1.9 167 243 2.2 158 228 2.8 3.6
1.5 1.5 202 303 1.8 169 253 2.1 162 233 2.7 3.5
1.6 1.4 213 328 1.7 179 268 2.0 165 238 2.6
1.7 1.3 225 373 1.6 189 283 1.9 167 243 2.5 152 218 3.3
1.8 1.2 255 423 1.5 202 303 1.8 169 253 2.4 155 223 3.2 146 213
* Dropout voltage is defined as the VGS(=V
V
BIAS
VGS
(V)
TYP. MAX.
155 223
=3.0V V
Vdif(mV) Vdif(mV) Vdif(mV) Vdif(mV) Vdif(mV)
V
(V)
2.6
=3.3V V
BIAS
GS
TYP. MAX.
146 213
155 223
BIAS–VOUT(E)
DROPOUT VOLTAGE (mV)
=3.6V V
BIAS
V
GS
(V)
TYP. MAX.
2.9 3.5 4.3
146 213
2.6
155 223
V
(V)
3.2 4.0
2.9 3.7
=4.2V V
BIAS
GS
TYP. MAX.
140 208
146 213
) of the driver transistor.
BIAS
VGS
(V)
TYP. MAX.
137 206
4.1
140 208
3.4
=5.0V
6/29
■TEST CIRCUITS
CIRCUIT①
CIRCUIT②
CIRCUIT③
XC6603
Series
7/29
XC6603 Series
■TEST CIRCUITS (Continued)
CIRCUIT④
CIRCUIT⑤
8/29
XC6603
Series
■OPERATIONAL DESCRIPTION
The voltage divided by resistors R1 and R2 is compared with the internal reference voltage by the error amplifier. The V
by the subsequent output signal. The output voltage at the V
V
pin is power supply pin for output voltage control circuit, protection circuit and CE circuit. Also, the V
BIAS
output current. V
pin is connected to a driver transistor and provides output current.
IN
In order to obtain high efficient output current through low on-resistance, please take enough V
pin is controlled and stabilized by a system of negative feedback.
OUT
pin supplies some current as
BIAS
(=V
BIAS
– V
GS
) of the driver transistor.
OUT(E)
Figure1: XC6603 Series, Type A
<Soft-Start Function>
With the XC6603 (Type A), the inrush current (I
) from VIN to V
RUSH
for charging CL at start-up can be reduced and makes the VIN stable.
OUT
With connecting a soft-start capacitor to the SS pin, rise time of the reference voltage (Vref) is adjusted, then soft-start time can be set freely.
The inrush current conflicts with the soft-start time, so that the inrush current is decreased if the soft-start time is set longer.
Please also note that the inrush current is depended on C
L
. When CL or V
BIAS
is larger, the inrush current becomes larger. Please set
BIAS
or V
an appropriate soft-start time under the conditions of use.
When the SS pin is left open, soft-start circuit will not operate.
Soft-start time is calculated by the following formulas.
t
= CSS × Vsoft / Isoft
SS
t
: Soft-start time
SS
C
: Soft-start capacitance
SS
Vsoft: Soft-start threshold voltage
Isoft: SS pin current
Figure2: XC6603 Series, C
SOFT-START
CAPACITOR
Range of use
SS
SOFT-START TIME
CSS tSS (TYP.)
pin is then driven
OUT
～0.01μF ～2.17ms
XC6603 Series, Soft-start
9/29
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