XC6413 Series
High Speed LDO Regulators
Low ESR Cap. Compatible, Voltage Detector Function
July 15, 2003 Ver. 1
! Low Power Consumption
! Dropout Voltage
" APPLICATIONS
: 35µA (TYP.)
#
#
#
#
#
#
#
: 60mV @ 30mA
: 200mV @ 100mA
! Maximum Output Current
: more than 300mA (380mA limit)
(1.8V≤VROUT≤5.3V)
! Highly Accurate
! VR Setting Output Voltage Range
! Detect Voltage Setting Range
! Low ESR capacitor compatible
: ± 2%
: 0.9V ~ 5.5V
: 0.9V ~ 6.0V (VIN : ≥2.0V)
" GENERAL DESCRIPTION
Mobile phones, Cordless phones
Wireless communication equipment
Cameras, Video recorders
Portable games
Portable AV equipment
Reference voltage
Battery powered equipment
" FEATURES
Maximum Output Current
The XC6413 series are highly precise, low noise, positive voltage LDO
regulators with voltage detector manufactured using CMOS processes.
More 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. Detect voltage is
selectable in 0.1V increments within a range of 0.9V ~ 6.0V and VR
output voltage is selectable within a range of 0.9V~5.5V.
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 series provides options to choose suited functions to each systems
such as detector monitoring, detector output logic, CE and EN pin input
logic, internal pull-up / down resistance, power ready (PR) function.
The IC's internal regulator circuitry can be in stand-by mode by the EN
function with the XC6413 A to C series.
The whole IC's circuitry can be in stand-by mode via CE function with the
XC6413D series (semi-custom). In the stand by mode, power
consumption can be greatly reduced.
XC6413 A and B series has toggle operation function. The regulator
output can be OFF when XC6413B series detect voltage (semi-custom).
XC6413E series can monitor the other power source by using VSEN pin
(semi-custom).
By the function to delay capacitor, XC6413F series can delay VD output.
Delay time can be regulated by a capacitor (semi-custom).
Options setup of detector monitoring, detector output logic, CE/EN pin
input logic, internal pull-up and pull-down resistance etc. are possible.
The function such as Power Ready (PR) function which suited systems,
can be chosen (semi-custom).
: more than 300mA
(380mA limit)
(1.8V≤VROUT≤5.3V)
Dropout Voltage
: 200mV (IROUT=100mA)
Maximum Operating Voltage
: 2.0V ~ 10.0V
VR Setting Output Voltage Range
: 0.9V~ 5.5V (0.1V step)
VD Detect Voltage Setting Range
: 0.9V ~ 6.0V (0.1V step)
When monitoring VIN
: more than 2.0V
VR setting voltage accuracy
: ± 2%
VD detect voltage accuracy
: ± 2%
VR.VD Temperature Coefficient
: ±100ppm/OC (TYP.)
Low Power Consumption
: TYP. 35µA
High Ripple Rejection
: 65dB (10kHz)
Low Output Noise
: 30mVrms
Low ESR Capacitor Compatible
: Ceramic capacitor
Ultra Small Packages
: SOT-25 (SOT-23-5)
: USP-6B
: SOT-89-5
: - 40 ~ 85OC
Operational Ambient Temperature:
" TYPICAL APPLICATIONS
1
CI
1µ
VIN
1
VROUT 5
Rpull
220K
2
VSS
3
EN/CE
VDOUT 4
CL
1µF
CIN
1µF
VIN
2
VSS
3
VSEN
1
VROUT 5
Rpull
220K
VDOUT 4
CL
1µF
CIN
1µF
2
3
VI
VSS
Cd
VROUT
5
Rpull
220K
CL
1µF
VDOUT 4
Cd
0.01µF
XC6413A ~ D Series
XC6413E Series
XC6413F Series
Semiconductor Ltd.
1
XC6413 Series
High Speed LDO Regulators
Low ESR Cap. Compatible, Voltage Detector Function
" PIN CONFIGURATION
VROUT
EN/CE
VSEN/Cd
5
VDOUT
5
4
1
2
VIN
3
VDOUT
4
1
VIN
VSS EN/CE
VSEN/Cd
EN/CE
VSEN/Cd
NC
VIN
6
5
3
4
VDOUT
VSS
VROUT
3
VROUT
2
VSS
USP-6B
(TOP VIEW)
SOT-89-5
(TOP VIEW)
SOT-25
(TOP VIEW)
1
2
" PIN ASSIGNMENT
PIN NUMBER
PIN NAME
FUNCTION
3
VIN
Power Input
5
VSS
Ground
5
1
EN
VR On / Off Control
3
5
1
CE
On / Off Control
3
5
1
VSEN
VD Monitoring
3
5
1
Cd
Delay capacitor Connection
4
4
6
VDOUT
VD Output
3
3
4
VROUT
VR Output
-
-
2
NC
No connection
SOT-25
SOT-89-5
USP-6B
1
1
2
2
3
" SELECTION GUIDE
1. Toggle Function, VD self-saturation as option
2. Stand-by mode function as option
TOGGLE FUNCTION (BUILT-IN)
SERIES
XC6413A
VD with Toggle Function
XC6413B
VD with Toggle Function and Self-Saturation
XC6413C ~ F
SERIES
STAND-BY MODE FUNCTION
XC6413A ~ C
VR with Stand-by mode function
XC6413D
VD without Toggle Function
XC6413E, F
Chip Stand-by mode function
No Stand-by mode function
3. CE / EN Input Logic, Internal Pull-up / down as option
SERIES
CE INPUT LOGIC
XC6413 * A ~ D
High Active with pull down
XC6413 * E ~ K
High Active with no pull down
XC6413 * L ~ P
Low Active with pull up
XC6413 * R ~ U
Low Active with no pull up
* : A ~ D series
4. VD Sense as option
SERIES
VD SENSE PIN
XC6413 * A, B, E, F, L, M, R, S, V, X
VIN
XC6413 * C, D, H, K, N, P, T, U, Y, Z
VOUT
XC6413 E V ~ Z
VSEN
* : A ~ D and F series
5. VD Output Logic as option
SERIES
VD OUTPUT LOGIC FUNCTION
XC6413A ~ F
Detect L or Detect H
6. VD Delay Function as option
SERIES
XC6403A ~ E
XC6403F
DELAY FUNCTION
No Delay
Delay time adjustable by connecting Cd
Semiconductor Ltd.
2
XC6413 Series
High Speed LDO Regulators
Low ESR Cap. Compatible, Voltage Detector Function
" ORDERING INFORMATION
XC6413 123456
PIN NUMBER
PIN NUMBER
FUNCTION
FUNCTION
Denotes Optional Functions :
A : Toggle and EN Function (preliminary)
Denotes Packaging Types:
B : Toggle, EN Function, VD signal/VR OFF function
(preliminary)
1
C : EN Function (preliminary)
5
D : USP-6B
D : CE Function (preliminary)
M : SOT-23
E : VSEN Pin (preliminary)
P : SOT-89-5
F : Cd Pin
Denotes Types :
2
As in the chart below.
Denotes Taping Direction:
Sequence Number according to R&D standard in
regards to output voltage and detect voltage
34
6
R: Standard feed
VR Setting Output Voltage Range : 0.9V ~ 5.5V
L : Reverse feed
Detect Voltage Setting Range : 0.9V ~ 6.0V
0.1V step increments is available
PIN NUMBER : 2 Types
EN / CE LOGIC
PULL UP/DOWN
RESISTANCE
Function
High Active
Function
VIN
Detect L
High Active
Function
VIN
Detect H
2
EN / CE FUNCTION
A
VD SENSE PIN
VD OUTPUT LOGIC
B
Function
C
Function
High Active
Function
VROUT
Detect L
D
Function
High Active
Function
VROUT
Detect H
E
Function
High Active
Nonfunctional
VIN
Detect L
F
Function
High Active
Nonfunctional
VIN
Detect H
H
Function
High Active
Nonfunctional
VROUT
Detect L
K
Function
High Active
Nonfunctional
VROUT
Detect H
L
Function
Low Active
Function
VIN
Detect L
M
Function
Low Active
Function
VIN
Detect H
N
Function
Low Active
Function
VROUT
Detect L
P
Function
Low Active
Function
VROUT
Detect H
R
Function
Low Active
Nonfunctional
VIN
Detect L
S
Function
Low Active
Nonfunctional
VIN
Detect H
T
Function
Low Active
Nonfunctional
VROUT
Detect L
U
Function
Low Active
Nonfunctional
VROUT
Detect H
V
Nonfunctional
-
-
VIN / VSEN
Detect L
X
Nonfunctional
-
-
VIN / VSEN
Detect H
Y
Nonfunctional
-
-
VROUT
Detect L
Z
Nonfunctional
-
-
VROUT
Detect H
PIN NUMBER 1
A ~ D Series
E & F Series
F Series
* XC6413A, B, C, D, E Series are are under development. For further detail, please ask your sales contacts.
Semiconductor Ltd.
3
XC6413 Series
High Speed LDO Regulators
Low ESR Cap. Compatible, Voltage Detector Function
" ODERING INFORMATION (CONTINUED)
PIN NUMBER
34
3, 4
VROUT
Type
(80 ~ 99 : Standard voltage products)
34
VDOUT
VROUT
VDOUT
34
VROUT
VDOUT
34
90
01
11
80
1.8
1.6
02
12
81
2.8
3.1
91
03
13
82
1.8
2.0
92
04
14
83
2.5
2.8
93
05
15
84
2.85
3.2
94
06
16
85
3.0
3.3
95
07
17
86
3.5
3.8
96
08
18
87
3.0
4.2
97
09
19
88
3.3
4.0
98
10
20
89
VROUT
VDOUT
99
Except for the standard products, minimum ordering quantity is 15K.
" ABSOLUTE MAXIMUM RATINGS
PARAMETER
SYMBOL
RATINGS
UNITS
VIN PIN Voltage
VIN
12
V
VROUT Current
VRIOUT
700
mA
VROUT Pin Voltage
VROUT
VSS -0.3 ~ VIN +0.3
V
VDOUT Current
VDIOUT
50
mA
VD Pin Voltage
VDOUT
VSS -0.3 ~ 12.0
V
VCE / VSEN / Cd
Pin Voltage
VCE /
VSS -0.3 ~ VIN + 0.3
V
Continuous Total
Power Dissipation
VSEN / Cd
250
SOT-25
SOT-89-5
Pd
500
mW
100
USP-6B
Operating Ambient Temperature
Topr
- 40 ~ + 85
Storage Temperature
Tstg
- 55 ~ + 125
O
C
O
C
" PACKAGING INFORMATION
$ SOT-89-5
$ USP-6B
2.0 + 0.15
(0.45) 0.5+0.1
3
5
4
O
45
A’
(0.27)
6
45 O
2
(0.27)
(
1.8+0.15
1
AAA
AAA
0.45)
1
A
(0.27)
φ
(0.05)
(0.45) (0.45)
O
+0.01
(0.05) -0.005
0.005+0.002
45
(0.65)+0.15
-0.05
(0.125)
45 O
1
6
1
1
1.0+0.1
0.25+0.1
1
.
0.5+0.1 0.5+0.1
5
1
00.1+0.03
2
1.6+0.15
4
3
1
5-0.2+0.05
0.7+0.03
0.2+0.05
$ SOT-25 (SOT-23-5)
0.25+0.1
Semiconductor Ltd.
4
XC6413 Series
High Speed LDO Regulators
Low ESR Cap. Compatible, Voltage Detector Function
" ELECTRICAL CHARACTERISTICS
Ta=25OC
XC6413 FV / FX / FY / FZ Series
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
CIRCUIT
VR Output Voltage
VR Maximum Output Current
(0.9 ~ 1.7V product)
VR Maximum Output Current
(1.8 ~ 5.3V product)
VR Load Regulation
VROUT(E)
IROUT=30mA
x 0.98
VROUT(T)
x 1.02
V
1
IROUTMAX
VIN = 3.1V
150
mA
1
IROUTMAX
VIN=3.1V @ VROUT ≤ 2.1V
300
mA
1
∆VROUT
Vdif1
Vdif2
1mA≤IROUT≤100mA
IROUT=30mA
IROUT=100mA
15
E-1
E-2
50
mV
mV
mV
1
1
1
IDD
VIN=VROUT(T)+1.0V
35
70
µA
2
VROUT(T)+1.0V≤VIN≤10.0V
IROUT=30mA
0.01
0.20
%/V
1
Input Voltage
VR Output Voltage
Temperature Characteristics
∆VROUT
∆VIN ⋅ VROUT
VIN
∆VROUT
∆Topr ⋅ VROUT
10.0
V
-
VR Ripple Rejection Rate
PSRR
VOLTAGE REGULATOR
VR Dropout Voltage
Supply Current
(FV / FX / FY / FZ Series)
VR Line Regulation
VR Current Limiter
(1.8V or more)
VR Current Limiter
(1.7V or less)
2.0
IROUT=30mA
-40OC≤Topr≤85OC
VIN=[VROUT(T)+1.0]V+0.5Vp-pAC
When VROUT(T) ≤ 1.25V
! VIN=2.25V+0.5Vp-pAC
IROUT=50mA, f=10kHz
ppm / C
65
dB
380
mA
mA
IRlim
VIN=3.1V @ VROUT ≤ 2.1V
IRlim
VIN=3.1V
380
Short-circuit Current
IRshort
VIN=VROUT(T)+1.0V
VIN=3.1V @ VROUT ≤ 2.1V
50
VD Detect Voltage
VDF (E)
VD Hysterisis Range
VHYS
VD Output Current
IDOUT
VDOUT = 0.5V
VIN = 2.0V
VIN = 3.0V
VIN = 4.0V
VIN = 5.0V
VIN = 6.0V
VIN = 7.0V
VIN = 8.0V
VIN = 9.0V
VIN = 10.0V
VD Detect Voltage
Temperature Characteristics
∆VDF /
∆Topr ⋅ VDF
-40OC≤Topr≤85OC
Delay Resistance
Delay
VIN=7.0V, Cd=0V
Delay Resistance=7.0V/Delay Current
VOLTAGE DETECTOR
±100
300
x 0.98
VDF (T)
x 0.02
VDF (T)
VDF (T)
x 0.05
2.0
4.0
5.0
6.0
6.5
7.0
7.5
8.0
8.5
5.0
7.5
9.5
10.5
11.5
12.5
13.5
14.5
14.5
O
x 1.02
VDF (T)
x 0.08
±100
1.0
2.0
3.5
1
3
1
1
mA
V
1
4
V
4
mA
5
ppm / OC
4
MΩ
6
NOTE:
(NOTE 1) Unless otherwise stated, VIN=VOUT(T)+1.0V
(NOTE 2) VROUT(T)=Specified VR Output Voltage
(NOTE 3) VOUT(E)=Actual VR Output Voltage
(I.e. the VR output voltage when "VROUT(T)+1.0V" is provided at the VIN pin while maintaining a certain IROUT value).
(NOTE 4) Vdif={VIN1(NOTE6)-VROUT1(NOTE5)}
(NOTE 5) A voltage equal to 98% of the VR Output Voltage whenever an amply stabilized VROUT1=IROUT{VROUT(T)+1.0V} is input.
(NOTE 6) VIN1=The Input Voltage when VOUT1 appears as Input Voltage is gradually decreased.
(NOTE 7) VDF (T) : Specified Detect Voltage value
(NOTE 8) VDF (E) : Actual Detect Voltage value. Refer E-0 chart for VDF(T) less than 1.5V.
(NOTE 9) VD output current = sink current value when detecting.
Semiconductor Ltd.
5
XC6413 Series
High Speed LDO Regulators
Low ESR Cap. Compatible, Voltage Detector Function
" VR DROPOUT VOLTAGE
SYMBOL
E-0
E-1
E-1
OUTPUT VOLTAGE
DETECT VOLTAGE
DROPOUT VOLTAGE 1 (mV)
(IOUT=30mA)
DROPOUT VOLTAGE 2 (mV)
(IOUT=100mA)
(V)
Ta=25OC
Ta=25OC
PARAMETER
SPECIFIED
DETECT VOLTAGE
OUTPUT VOLTAGE
VROUT(T)
VDF(T)
0.90
1.00
1.10
1.20
1.30
1.40
1.50
1.60
1.70
1.80
1.90
2.00
2.10
2.20
2.30
2.40
2.50
2.60
2.70
2.80
2.90
3.00
3.10
3.20
3.30
3.40
3.50
3.60
3.70
3.80
3.90
4.00
4.10
4.20
4.30
4.40
4.50
4.60
4.70
4.80
4.90
5.00
5.10
5.20
5.30
5.40
5.50
5.60
5.70
5.80
5.90
6.00
VROUT / VDF
MIN.
0.870
0.970
1.070
1.170
1.270
1.370
1.470
1.568
1.666
1.764
1.862
1.960
2.058
2.156
2.254
2.352
2.450
2.548
2.646
2.744
2.842
2.940
3.038
3.136
3.234
3.332
3.430
3.528
3.626
3.724
3.822
3.920
4.018
4.116
4.214
4.312
4.410
4.508
4.606
4.704
4.802
4.900
4.998
5.096
5.194
5.292
5.390
5.488
5.586
5.684
5.782
5.880
MAX.
0.930
1.030
1.130
1.230
1.330
1.430
1.530
1.632
1.732
1.836
1.938
2.040
2.142
2.244
2.346
2.448
2.550
2.652
2.754
2.856
2.958
3.060
3.162
3.264
3.366
3.468
3.570
3.672
3.774
3.876
3.978
4.080
4.182
4.284
4.386
4.488
4.590
4.692
4.794
4.896
4.998
5.100
5.202
5.304
5.406
5.508
5.610
5.712
5.814
5.916
6.018
6.120
Vdif1
Vdif1
Vdif2
Vdif2
TYP.
1050
1000
900
800
700
600
500
400
300
200
120
80
80
80
80
80
70
70
70
70
70
60
60
60
60
60
60
60
60
60
60
60
60
60
60
60
60
60
60
60
60
50
50
50
50
50
50
MAX.
110
110
100
900
800
700
600
500
400
300
150
120
120
120
120
120
100
100
100
100
100
90
90
90
90
90
90
90
90
90
90
80
80
80
80
80
80
80
80
80
80
70
70
70
70
70
70
TYP.
1150
1050
950
850
750
650
550
500
400
300
280
240
240
240
240
240
220
220
220
220
220
200
200
200
200
200
200
200
200
200
200
180
180
180
180
180
180
180
180
180
180
160
160
160
160
160
160
MAX.
1200
1200
1100
1000
900
800
700
600
500
400
380
350
330
330
310
310
290
290
290
270
270
270
250
250
250
250
250
250
250
250
250
230
230
230
230
230
230
230
230
230
230
210
210
210
210
210
210
Semiconductor Ltd.
6
XC6413 Series
High Speed LDO Regulators
Low ESR Cap. Compatible, Voltage Detector Function
" TEST CIRCUITS
$ Circuit 1
XC6413F Series
VIN
A
A
VROUT
CIN= 1µF
(Ceramic)
CL= * *µF
(Ceramic)
VSS
V
$ Circuit 2
RL
VDOUT
VIN
Cd
XC6413F Series
VIN
A
VROUT
CIN= 1µF
(Ceramic)
VSS
VDOUT
VIN
Cd
$ Circuit 3
XC6413F Series
VIN
VROUT ≤ 1.25V
VIN={2.25V}VDC
+0.5Vp-pAC
VROUT
CL= * *µF
(Ceramic)
VSS
VIN={VROUT+1.0V}VDC
+0.5Vp-pAC
V
V
IROUT=50mA
VDOUT
Cd
Output Capacitor Corresponding Chart
VROUT
0.9 ~1.2V
1.3 ~ 1.7V
CL
more than 4.7µF
more than 2.2µF
Semiconductor Ltd.
7
XC6413 Series
High Speed LDO Regulators
Low ESR Cap. Compatible, Voltage Detector Function
" TEST CIRCUITS (CONTINUED)
$ Circuit 4
XC6413F Series [VD Sense, VIN type]
VIN
VROUT
CIN= 1µF
(Ceramic)
VSS
VDOUT
VIN
Cd
A
VDS
XC6413F Series [VD Sense, VROUT type]
VIN
VROUT
CIN= 1µF
(Ceramic)
VSS
VDOUT
VIN
A
Cd
VDS
$ Circuit 5
XC6413F Series [VD Sense, VIN type]
VIN
VROUT
CIN= 1µF
(Ceramic)
VSS
VDOUT
VIN
Cd
A
VDS
XC6413F Series [VD Sense, VROUT type]
VIN
VROUT
CIN= 1µF
(Ceramic)
VSS
VDOUT
VIN
Cd
A
VDS
Semiconductor Ltd.
8
XC6413 Series
High Speed LDO Regulators
Low ESR Cap. Compatible, Voltage Detector Function
" TEST CIRCUITS (CONTINUED)
$ Circuit 6
XC6403F Series
[VD Sense, VIN type]
VIN
VROUT
CIN= 1µF
(Ceramic)
VSS
VDOUT
VIN
A
XC6403F Series
Cd
[VD Sense, VROUT type]
VIN
VROUT
CIN= 1µF
(Ceramic)
VSS
VDOUT
VIN
A
Cd
Semiconductor Ltd.
9
XC6413 Series
High Speed LDO Regulators
Low ESR Cap. Compatible, Voltage Detector Function
" BLOCK DIAGRAM
Optional:
Active H with Pull-down R
Active H with no Pull-down R
Active L with Pull-up R
Active L with no Pull-up R
VIN
toggle FF
EN
ON / OFF
Control
T
Optional:
Q
VR circuit
VIN SENSE
VROUT SENSE
R
Current
Limit
1 Shot
Pulse
Power ON
Clear for FF
Error Amp.
CFB
Optional
(B Series)
Voltage
Reference
VDOUT
R1
R4
R3
Comp. VD
Optional:
VROUT
R2
VSS
Detect H
Detect L
XC6413A, B Series
VI
EN / CE
VR circuit (C Series)
each circuit (D Series)
ON / OFF
Control
Optional:
VIN SENSE
VROUT SENSE
Current
Limit
Optional:
Active H with Pull-up R
Active H with no Pull-up R
Active L with Pull-up R
Active L with no Pull-up R
Error Amp.
CFB
Voltage
Reference
VDOUT
Optional:
Detect H
Detect L
VROUT
R2
R1
R4
R3
Comp. VD
VSS
XC6413C, D Series
Semiconductor Ltd.
10
XC6413 Series
High Speed LDO Regulators
Low ESR Cap. Compatible, Voltage Detector Function
" BLOCK DIAGRAM (CONTINUED)
VIN
VSEN
Current
Limit
VROUT
Error Amp.
CFB
Voltage
Reference
VDOUT
R2
R1
R4
R3
Comp. VD
Optional:
VSS
Detect H
Detect L
XC6413E Series
VIN
Optional:
Current
Limit
Rdelay
VROUT
Error Amp.
CFB
Cdelay
Voltage
Reference
VDOUT
Optional:
VIN SENSE
VROUT SENSE
R2
R1
R4
R3
Comp. VD
VSS
Detect H
Detect L
XC6413F Series
Semiconductor Ltd.
11
XC6413 Series
High Speed LDO Regulators
Low ESR Cap. Compatible, Voltage Detector Function
<Output voltage regulator control>
The voltage divided by resistors R1 & R2 which are connected to VROUT pin 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 VROUT 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 voltage regulator's internal circuitry can be
shutdown via the CE pin's signal.
<Detector function with the XC6413 series>
The voltage divided by resistors R3 & R4 which are connected to VROUT pin, VIN or VSEN pin are compared with the internal reference voltage by the
compalator. Option is available for the VDSEN. A 'High' or 'Low' signal level can be output from the VDOUT pin when the VD pin voltage level of less
than the detect voltage is reached. Option is available for the VD output logic. As VDOUT is an open-drain N-channel output, a pull-up resistor of about
220KΩ is needed to achieve a voltage output. Because of hysterisis at the detector function, output at the VDOUT pin will invert when the detect voltage
level increase more than the release voltage (105% of the detect voltage). Even when the XC6413A, B, C, series are in stand-by mode, the voltage
detector function operates and the output voltage at VDOUT will output according to the voltage level at VDSENSE voltage.
In stand-by, if a voltage of the recovery voltage is present at the VROUT pin (from another power source), the VDOUT pin will be high impedance and
pull up voltage will be output at VDOUT. By connecting Cdelay pin to a capacitor (Cd), XC6413F series can put delay time to VDOUT voltage when
releasing voltage. Delay time can be set by the internal resistance (2MΩ fixed) and the value of Cd as the following equation.
Delay Time = Cdelay x Rdelay x 0.7
<Low ESR Capacitors>
With the regulator of XC6413 series, a stable output voltage is achievable even if used with low ESR capacitors as a phase compensation circuit is builtin. 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 (VROUT) and the VSS pin. Please use an output capacitor (CL) with a capacitance refering to the chart below, and an 1µF of input capacitor
(CIN) be connected between VIN and VSS to stabilize input power source.
VROUT
0.9 ~ 1.2V
1.3 ~ 1.7V
CL
more than 4.7µF
more than 2.2µF
<Current Limiter, Short-Circuit Protection>
The regulator of XC6413 series offers a combination of current limit and circuit protection by means of a built-in fixed current limiter circuit & a foldback
circuit. 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.
<EN / CE Pin>
The IC's internal regulator circuitry can be shutdown via the signal from the EN pin with the XC6413A, B, C series. In shutdown mode, output at the
VROUT pin will be pulled down to the VSS level via R1 & R2. The whole IC's circuitry can be shut down via CE pin with the XC6413D series and power
consumption can be reduced to around 0 µA. In shutdown mode, output of VD is voltage after detecting. When choosing Detect L, input current can be
set by the following formula.
Input Current = VIN voltage / Pull Up Resistance
In standby mode, the above input current can be withheld by connecting pull-up resistance between VROUT and VDOUT.
Note that as the XC6413*E to K of XC6413A to D series are 'High Active/No Pull Down' and XC6413*R to U of XC6413A to D series are 'Low Active/No
Pull UP', operations will become unstable with the CE pin open (See the chart below).
SERIES
EN/CE INPUT LOGIC
XC6413 * A ~ D
High Active with pull down
XC6413 * E ~ K
High Active with no pull down
XC6413 * L ~ P
Low Active with pull up
XC6413 * R ~ U
Low Active with no pull up
We suggest that you use this IC with either a VIN voltage or a VSS voltage input at the EN or CE pin. If this IC is used with the correct specifications for
the EN or CE pin, the IC will operate normally. However, supply current may increase as a result of through current in the IC's internal circuitry if a
voltage other than VIN or VSS is applied.
Semiconductor Ltd.
12
XC6413 Series
High Speed LDO Regulators
Low ESR Cap. Compatible, Voltage Detector Function
<Toggle Operation>
XC6413 series has built-in toggle ON/OFF switch which repeats an on/off operation via the EN pin's leading edge signal when the EN logic is "High"
active, and via the EN pin's falling edge signal when the EN logic is "Low" active (Please also refer the figure below). Please input EN input signal more
than 500nsec. If the EN input signal is less than 500nsec, there is the case that the circuit falls to respond and the toggle function cease to work. To
operate the toggle function properly, please eliminate the noise from EN signal by using RC filter, etc. A flip-flop FF used for toggle operation can be
reset within the XC6413B series directly by the signal from the voltage detector. The signal of the voltage detector will be transformed to one-shot signal
to reset FF. The voltage regulator output when the EN pin release the signal again.
VIN
CIN
1µF
VROUT
Rpull
220kΩ
VSS
1.5kΩ
EN
VIN
0.1µF
CL
1µF
VDOUT
Internal Circuit - Response time
approx.10µsec
VROUT
GND
VROUT
VIN
GND
EN pin signal
more than 500nsec
EN Logic "High" Active
"
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 strengthen 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.
In case that rapid input fluctuation or load fluctuation are occurred, please enlarge capacitor value such as CIN or CL
to stabilize the operation.
Semiconductor Ltd.
13