XC6207A161ML [TOREX]
Regulator;
| 型号： | XC6207A161ML |
| 厂家： | 
Torex Semiconductor |
| 描述： | Regulator |
| 文件： | 总13页 (文件大小：328K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
☆GO-Compatible
Preliminary
◆Low Power Consumption
■APPLICATIONS
●
●Portable games
●Cameras, VCRs
●Portable AV equipment
●PDAs
◆Dropout Voltage
: 40mV@30mA
135mV@100mA
●Cellular phones
Cordless phones, Wireless communication equipment
◆Output Voltage Range : 0.8V ~ 5.0V
◆Output Current
:
300mA <Up to 380mA (TYP.)>
◆Low ESR Capacitor Compatible
◆Fast Ripple Rejection, Low Output Noise
◆Green Operation (GO)
◆CL Auto-Discharge (XC6207B)
■GENERAL DESCRIPTION
■FEATURES
The XC6207 series are precise, low noise, high speed, low
dropout regulators with green operation (GO) function.
They are fabricated using Torex’s CMOS process.
Performance features of the series includes fast ripple
rejection and low dropout voltage, and the series includes a
voltage reference, an error amplifier, a current limiter anda
phase compensation circuit plus a driver transistor.
Green operation (GO) provides high speed operation, low
power consumption and high efficiencies by automatically
switching between a high speed mode (HS) and a power
save mode (PS) depending upon the load current level. The
switch point is fixed internally within the IC.
Maximum Output Current
Dropout Voltage
:
300mA <Up to 380mA (TYP.)>
: 135mV@ IOUT=100mA
Operating Voltage Range: 2.0V ~ 6.0V
Output Voltage Setting Range
Accuracy
:
:
0.8V ~ 5.0V (50mV increments)
±
2% (HS Mode:VOUT >1.5V)
＋
2%,-3% (PS Mode:VOUT >1.5V)
30mV (HS Mode:VOUT 1.5V)
±
≦
+30mV, -45mV (HS Mode:VOUT
≦
1.5V)
Low Power Consumption
Standby Current
Fast Ripple Rejection : 70dB @ 1kHz
Operating Temperature Range: 40℃ ~ 85℃
Low ESR Capacitor
Ultra Small Packages : SOT-25
USP-6C
:
5.5
50
: Less than 0.1μA
μ
A (TYP.), when PS mode
When only high-speed operation is required, it can be fixed
by inputting a high level signal to the GO pin, thus providing
operating conditions with the most suitable level of supply
current for the application.
μ
A (TYP.), when HS mode
By inputting a low signal to the CE pin, the IC will be put into
an OFF state. In this state, with the XC6207B series, a short
will be created via the internal switch located between the
VOUT and VSS pins.
: Ceramic capacitor compatible
This short enables the stored charge at the output capacitor
(CL) to be discharged enabling the VOUT pin quickly returns
to the VSS level.
The series' output stabilization capacitor (CL) is also
compatible with low ESR ceramic capacitors. Output
voltage is selectable in 50mV increments within a range of
0.8V ~ 5.0V. The constant current limit circuit and current
limiter's foldback circuit also operate as a short circuit
protection for the output current limiter and the output pin.
■TYPICAL PERFORMANCE
CHARACTERISTICS
■TYPICAL APPLICATION CIRCUIT
●Supply Current vs. Output Current
XC6207A182xx
VIN=CE, VSS=GO=0V
O
VIN=2.8V, CIN=CL=1.0µF, Ta=25 C
VIN
VSS
CE
VOUT
GO
80
70
60
50
40
30
20
10
0
CL
1uF
CIN
1uF
INPUT
0
1
2
3
4
5
Output Current IOUT (mA)
13
XC6207 Series
■PIN CONFIGURATION
VOUT
5
GO
4
VIN
CE
VSS
GO
* Please use the circuit without connecting the
heat dissipation pad.
If the pad needs to be connected to other
pins, it should be connected to the VSS pin,
No. 5.
NC
1
VIN
3
CE
2
VSS
VOUT
SOT-25
USP-6C
(TOP VIEW)
(BOTTOM VIEW)
■PIN ASSIGNMENT
PIN NUMBER
PIN NAME
FUNCTIONS
USP-6B
SOT-25
1
2
3
4
5
6
1
－
5
VIN
NC
VOUT
GO
VSS
CE
Power Input
No Connection
Output
4
Green Operation Mode Switch
Ground
2
3
ON/OFF Control
■PRODUCT CLASSIFICATION
●Ordering Information
XC6207 ①②③④⑤⑥
DESIGNATOR
DESCRIPTION
Type of Regulator
Output Voltage
SYMBOL
A
DESCRIPTION
: CE High Active, no resistor for fixing pin’s electrical potential,
no CL discharge resistor
: CE High Active, no resistor for fixing pin’s electrical potential,
with CL discharge resistor
: ex.) VOUT(E) = 3.0V → ② = 3, ③ = 0
HS mode : VOUT(T)±30mV
①
B
08 ~ 50
2
②
③
: When VOUT(T)
≦
1.5V,
1.5V,
PS mode : VOUT(T)＋30mV, VOUT(T) - 45mV
HS mode : ±2%
PS mode : ＋2%, -3%
④
Output Accuracy
1
: When VOUT(T)
: USP-6C
＞
E
M
R
L
⑤
⑥
Package
: SOT-25 (SOT-23-5)
: Embossed tape, Standard feed
: Embossed tape, Reverse feed
Device Orientation
14
XC6207
Series
■PACKAGING INFORMATION
●USP-6C
●SOT-25 (SOT-23-5)
.
0.30
0.10
Note: Pin 1 is larger than
the other pins
1.40
0.20
0.50
■MARKING RULE
①Represents product series
MARK
PRODUCT SERIES
XC6207******
5
2
4
7
5
4
②Represents type of regulator
①
②
③
④
MARK
PRODUCT SERIES
OUTPUT VOLTAGE
OUTPUT VOLTAGE
1
2
3
100mV step
50mV step
1
2
3
A
B
N
P
XC6207A*****
XC6207B*****
SOT-25
(TOP VIEW)
SOT-89-5
(TOP VIEW)
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
-
-
-
-
-
-
-
3.15
3.25
3.35
3.45
3.55
3.65
3.75
F
H
K
L
M
N
P
R
S
T
U
V
X
Y
Z
1.6 4.6 1.65 4.65
1.7 4.7 1.75 4.75
1.8 4.8 1.85 4.85
1.9 4.9 1.95 4.95
2.0 5.0 2.05
-
-
-
-
-
-
-
-
-
-
-
2.1
2.2
2.3
2.4
2.5
2.6
2.7
2.8
2.9
3.0
-
-
-
-
-
-
-
-
-
-
2.15
2.25
2.35
2.45
2.55
2.65
2.75
2.85
2.95
3.05
0.8 3.8 0.85 3.85
0.9 3.9 0.95 3.95
1.0 4.0 1.05 4.05
1.1 4.1 1.15 4.15
1.2 4.2 1.25 4.25
1.3 4.3 1.35 4.35
1.4 4.4 1.45 4.45
1.5 4.5 1.55 4.55
④Represents production lot number
0 to 9 ,A to Z reverse character 0 to 9, A to Z repeated(G,I,J,O,Q,W excepted)
15
XC6207 Series
■MARKING RULE (Continued)
①②Represents product series
MARK
PRODUCT SERIES
XC6207******
①
②
0
7
③Represents type of regulator
MARK
USP-6C
(TOP VIEW)
TYPE
PRODUCT SERIES
A
B
High Active with No Pull-Down Resistor, No CL Discharge Resistor XC6207A***D*
High Active with No Pull-Down Resistor, with CL Discharge Resistor XC6207B***D*
④Represents integer of the output voltage
ex)
MARK
3
5
VOLTAGE(V)
PRODUCT SERIES
XC6207*3**D*
XC6207*5**D*
3.X
5.X
⑤Represents decimal number of the output voltage
MARK VOLTAGE(V) PRODUCT SERIES
MARK VOLTAGE(V) PRODUCT SERIES
0
1
2
3
4
5
6
7
8
9
X.0
X.1
X.2
X.3
X.4
X.5
X.6
X.7
X.8
X.9
XC6207**02/1D*
XC6207**12/1D*
XC6207**22/1D*
XC6207**32/1D*
XC6207**42/1D*
XC6207**52/1D*
XC6207**62/1D*
XC6207**72/1D*
XC6207**82/1D*
XC6207**92/1D*
A
B
C
D
E
F
H
K
L
X.05
X.15
X.25
X.35
X.45
X.55
X.65
X.75
X.85
X.95
XC6207**0A/BD*
XC6207**1A/BD*
XC6207**2A/BD*
XC6207**3A/BD*
XC6207**4A/BD*
XC6207**5A/BD*
XC6207**6A/BD*
XC6207**7A/BD*
XC6207**8A/BD*
XC6207**9A/BD*
M
⑥Represents production lot number
0 to 9, A to Z repeated(G,I,J,O,Q,W excepted)
Note: No character inversion used.
16
XC6207
Series
■BLOCK DIAGRAMS
●XC6207A Series
●XC6207B Series
*Diodes inside the circuit are an ESD protection diode and a parasitic diode.
■ABSOLUTE MAXIMUM RATINGS
Ta=25℃
PARAMETER
Input Voltage
Output Current
SYMBOL
VIN
IOUT
VOUT
RATINGS
-0.3 ~ 7.0
500 *
UNITS
V
mA
V
Output Voltage
VSS – 0.3 ~ VIN + 0.3
VSS – 0.3 ~ VIN + 0.3
250
CE / GO Input Voltage
VCE/VGO
V
SOT-25 (SOT-23-5)
USP-6C
Power Dissipation
Pd
mW
100
Operating Temperature Range
Storage Temperature Range
Topr
Tstg
- 40 ~ + 85
- 55 ~ +125
℃
℃
* IOUT=Pd / (VIN-VOUT)
17
XC6207 Series
■ELECTRICAL CHARACTERISTICS
●XC6207A/B series
Ta=25℃
PARAMETER
SYMBOL
CONDITIONS
MIN.
TYP.
MAX.
UNITS CIRCUIT
×0.98
(*8)
×0.97
(* 8)
300
-
×1.02
(* 8)
×1.02
(* 8)
-
60
VGO=VIN, IOUT=10mA: HS mode
VOUT(T)
VOUT(E)
(* 3)
Output Voltage
V
1
VGO=VSS, IOUT=0.1mA: PS mode
VOUT(T)
Maximum Output Current
Load Regulation
IOUTMAX
UVOUT
Vdif1
Vdif2
ISS1
VCE=VIN
-
15
mA
mV
1
1
1mA<IOUT<100mA: HS mode
IOUT=30mA, VGO=VIN: HS mode
IOUT=100mA, VGO=VIN: HS mode
VIN=VCE=6.0V, VGO=VIN, IOUT=0mA
Dropout Voltage (* 4)
See the chart on next page
mV
1
Supply Current 1
35
50
80
8.0
0.1
μA
μA
μA
2
Supply Current 2
Standby Current
ISS2
ISTBY
VIN=VCE=6.0V, VGO=VSS, IOUT=0mA
VIN=6.0V, VCE=VSS
2.5
-0.1
5.5
-
2
2
UVOUT
VOUT(T)+1.0V<VIN<6.0V
Line Regulation
-
0.01
-
0.20
6.0
%/V
V
1
1
UVIN･VOUT VCE=VIN, IOUT=30mA
Input Voltage
Output Voltage
VIN
2.0
UVOUT
UTa･VOUT
IOUT=30mA
-40℃<Ta<85℃
-
100
-
ppm/℃
1
Temperature Characteristics
VIN={VOUT(T)+1.0} VDC+0.5Vp-pAC
IOUT=30mA, f=1kHz
VCE=VIN, VGO=VIN
VCE=VIN, VGO=VIN
VCE=VIN
VGO=VSS, ISS Search
VCE=VIN
VGO=VSS, ISS Search
VGO=VIN
VCE=VIN, ISS Search, IOUT=0mA
VGO=VIN
VCE=VIN, ISS Search, IOUT=0mA
VCE=VIN, VGO=VIN
VCE=VIN, VGO=VIN
VCE=VSS, VGO=VSS
VCE=VSS, VGO=VSS
VIN=6.0V, VOUT=6.0V, VCE=VGO=VSS
VCE=VIN, VGO=VSS, HS → PS,
ISS Search
Ripple Rejection Rate
PSRR
-
70
-
dB
3
Limit Current
Short Circuit Current
Ilim
Ishort
-
-
380
50
-
-
mA
mA
1
1
PS Switch Current
HS Switch Current
IOUTPS
-
-
0.30
1.0
-
-
mA
mA
6
6
IOUTHS
CE High Level Voltage
GO High Level Voltage
CE Low Level Voltage
GO Low Level Voltage
CE High Level Current
GO High Level Current
CE Low Level Current
GO Low Level Current
CL Auto-Discharge Resistance (* 7)
VCEH
VGOH
VCEL
VGOL
ICEH
IGOH
ICEL
IGOL
Rdischg
1.6
1.6
-
-
-
-
-
-
-
-
-
-
-
V
V
V
4
4
4
4
5
5
5
5
7
0.25
0.25
0.1
0.1
0.1
0.1
-
-
V
-0.1
-0.1
-0.1
-0.1
-
μA
μA
μA
μA
Ω
470
PS Switching Delay Time
TDPS
100
240
600
μsec
6
NOTE:
* 1: Unless otherwise stated, VIN=VOUT(T)＋1.0V. When VOUT(T)≦1.0V, VIN=2.0V.
* 2: VOUT(T) = Specified output voltage
* 3: VOUT(E) = Effective output voltage
(I.e. the output voltage when an amply stabilized "VOUT(T)＋1.0V" is provided at the VIN pin in the HS mode while maintaining a
certain IOUT value.)
(*5)
* 4: Vdif={VIN(*6)-VOUT
}
* 5: VOUT1=A voltage equal to 98% of the output voltage whenever an amply stabilized IOUT {VOUT(T)+1.0V} is input in the HS mode.
* 6: VIN1=The input voltage when VOUT appears as Input Voltage is gradually decreased.
* 7: CL auto-discharge resistance is available only for the XC6207B series. The XC6207A series discharges by resistors R1 and R2
as shown in the block diagrams.
* 8: The rated value of the output voltage when VOUT(T)
≦1.5V is VOUT(T)
±
30mV in HS mode , and VOUT(T)+30mV , VOUT(T)-45mV in PS mode.
18
XC6207
Series
■DROPOUT VOLTAGE CHART
SETTING
OUTPUT VOLTAGE
(V)
OUTPUT VOLTAGE
(PS MODE)
(V)
OUTPUT VOLTAGE
(HS MODE)
(V)
DROPOUT VOLTAGE 1
(mV)
DROPOUT VOLTAGE 2
(mV)
VOUT
VOUT
Vdif1
Vdif2
VOUT (T)
MIN.
MAX.
0.830
0.880
0.930
0.980
1.030
1.080
1.130
1.180
1.230
1.280
1.330
1.380
1.430
1.480
1.530
1.581
1.632
1.683
1.734
1.785
1.836
1.887
1.938
1.989
2.040
2.091
2.142
2.193
2.244
2.295
2.346
2.397
2.448
2.499
2.550
2.601
2.652
2.703
2.754
2.805
2.856
2.907
2.958
3.009
MIN.
0.770
0.820
0.870
0.920
0.970
1.020
1.070
1.120
1.170
1.220
1.270
1.320
1.370
1.420
1.470
1.519
1.568
1.617
1.666
1.715
1.764
1.813
1.862
1.911
1.960
2.009
2.058
2.107
2.156
2.205
2.254
2.303
2.352
2.401
2.450
2.499
2.548
2.597
2.646
2.695
2.744
2.793
2.842
2.891
MAX.
0.830
0.880
0.930
0.980
1.030
1.080
1.130
1.180
1.230
1.280
1.330
1.380
1.430
1.480
1.530
1.581
1.632
1.683
1.734
1.785
1.836
1.887
1.938
1.989
2.040
2.091
2.142
2.193
2.244
2.295
2.346
2.397
2.448
2.499
2.550
2.601
2.652
2.703
2.754
2.805
2.856
2.907
2.958
3.009
MIN.
1200
MAX.
1250
MIN.
1210
MAX.
1260
0.7550
0.8050
0.8550
0.9050
0.9550
1.0050
1.0550
1.1050
1.1550
1.2050
1.2550
1.3050
1.3550
1.4050
1.4550
1.5035
1.5520
1.6005
1.6490
1.6975
1.7460
1.7945
1.8430
1.8915
1.9400
1.9885
2.0370
2.0855
2.1340
2.1825
2.2310
2.2795
2.3280
2.3765
2.4250
2.4735
2.5220
2.5705
2.6190
2.6675
2.7160
2.7645
2.8130
2.8615
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
1100
1000
900
800
700
600
500
400
300
200
100
1150
1050
950
850
750
650
550
450
350
250
150
1110
1010
910
810
710
610
510
410
310
210
200
1160
1060
960
860
760
660
560
460
360
260
250
60
80
175
230
50
60
170
180
19
XC6207 Series
■DROPOUT VOLTAGE CHART (Continued)
SETTING
OUTPUT VOLTAGE
(V)
OUTPUT VOLTAGE
(PS MODE)
(V)
OUTPUT VOLTAGE
(HS MODE)
(V)
DROPOUT VOLTAGE 1
DROPOUT VOLTAGE 2
(mV)
(mV)
VOUT
VOUT
Vdif1
Vdif2
VOUT (T)
MIN.
MAX.
3.060
3.111
3.162
3.213
3.264
3.315
3.366
3.417
3.468
3.519
3.570
3.621
3.672
3.723
3.774
3.825
3.876
3.927
3.978
4.029
4.080
4.131
4.182
4.233
4.284
4.335
4.386
4.437
4.488
4.539
4.590
4.641
4.692
4.743
4.794
4.845
4.896
4.947
4.998
5.049
5.100
MIN.
2.940
2.989
3.038
3.087
3.136
3.185
3.234
3.283
3.332
3.381
3.430
3.479
3.528
3.577
3.626
3.675
3.724
3.773
3.822
3.871
3.920
3.969
4.018
4.067
4.116
4.165
4.214
4.263
4.312
4.361
4.410
4.459
4.508
4.557
4.606
4.655
4.704
4.753
4.802
4.851
4.900
MAX.
3.060
3.111
3.162
3.213
3.264
3.315
3.366
3.417
3.468
3.519
3.570
3.621
3.672
3.723
3.774
3.825
3.876
3.927
3.978
4.029
4.080
4.131
4.182
4.233
4.284
4.335
4.386
4.437
4.488
4.539
4.590
4.641
4.692
4.743
4.794
4.845
4.896
4.947
4.998
5.049
5.100
MIN.
MAX.
MIN.
MAX.
3.00
3.05
3.10
3.15
3.20
3.25
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
2.9100
2.9585
3.0070
3.0555
3.1040
3.1525
3.2010
3.2495
3.2980
3.3465
3.3950
3.4435
3.4920
3.5405
3.5890
3.6375
3.6860
3.7345
3.7830
3.8315
3.8800
3.9285
3.9770
4.0255
4.0740
4.1225
4.1710
4.2195
4.2680
4.3165
4.3650
4.4135
4.4620
4.5105
4.5590
4.6075
4.6560
4.7045
4.7530
4.8015
4.8500
40
65
135
170
20
XC6207
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, which is 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. The GO function monitors the output current and switches a
supply current to two values according to the level of output current. Further, the IC's internal circuitry can be shutdown via
the CE pin's signal.
ON/OFF
VIN
CE
Control
-
Current
Limit
Error
Amp
CE
/CE
+
VOUT
each circuit
Green
Operation
GO
R1
R2
Voltage
VSS
Reference
<Green Operation>
XC6207 series can be set as a fixed high-speed mode or a green operation (GO) mode via the signal of green operation
(GO) pin. The IC operates in the fixed high-speed mode when the GO pin is high level and operates in the GO mode when
the GO pin is low level. The GO mode automatically switches the supply current to the high speed (HS) mode or the power
save (PS) mode according to the level of output current. While having both high-speed operation and low supply current
state, the XC6207 series can acquire high efficiency. The switching point of the HS mode and the PS mode is being fixed
inside the IC. When the output current becomes IOUTPS 0.3mA (TYP.) or below, the mode changes automatically to the
PS mode after the delay time of hundreds µsec(s), and it can reduce supply current in light load. When the output current
becomes IOUTHS:1mA (TYP.) or more, the mode will automatically switch to the HS mode. For applications, which need
higher output current during the system operation such as portable equipment, the mode switches to the HS mode
automatically and the operation also becomes high speed. In the HS mode, the response of the output voltage during the
output current fluctuation is better than the PS mode. If the output voltage fluctuation caused by the rapid output current
fluctuation during the PS mode is dissatisfied, please change the GO pin signal to H level, and use it in the fixed
high-speed mode. It is suggested that you use this IC with either a VIN voltage or a VSS voltage input at the GO pin. If this
IC is used with the correct specifications for the GO pin, the IC will operate normally. However, supply current may increase
as a result of through current in the IC's internal circuitry when medium voltage is input
21
XC6207 Series
■OPERATIONAL EXPLANATION (Continued)
<Green Operation> (Continued)
● Load Transient Response by Switching Mode
○ GO mode (GO pin voltage: Low)
○
Fixed high speed mode via GO pin signal (GO pin voltage: Low to High)
Output Current: IOUT=0.1mA→100mA→0.1mA
Output Current: IOUT=0.1mAt100mAt0.1mA
XC6207x302
Fixed High Speed mode
XC6207x302
GO mode
VIN=4.0V, Ta=25℃
VIN=4.0V, Ta=25℃
CIN=2.2μF, CL=1.0μF
CIN=2.2μF, CL=1.0μF
3.8
3.6
3.4
3.2
3.0
2.8
2.6
2.4
700
600
500
400
300
200
100
0
3.8
700
600
500
400
300
200
100
0
VGO=VIN
GO pin voltage VGO
Output Current IOUT
3.6
3.4
3.2
3.0
2.8
2.6
2.4
GO pin voltage VGO
VGO=0V
100mA
0.1mA
100mA
0.1mA
0.1mA
0.1mA
Output Current IOUT
Output Voltage VOUT
Output Voltage VOUT
Supply Current ISS
Time (1msec/div)
Time (1msec/div)
○ GO mode (GO pin voltage: Low)
○
Fixed high speed mode via GO pin signal (GO pin voltage: Low to High)
Output Current: IOUT=0.1mAt5mAt0.1mA
Output Current: IOUT=0.1mAt5mAt0.1mA
XC6207x302
Fixed High Speed mode
XC6207x302
GO mode
VIN=4.0V, Ta25 ℃
CIN=2.2μF, CL=1.0μF
VIN=4.0V, Ta=25℃
CIN=2.2μF, CL=1.0μF
3.8
3.6
3.4
3.2
3.0
2.8
2.6
2.4
700
600
500
400
300
200
100
0
3.8
700
600
500
400
300
200
100
0
VGO=VIN
GO pin voltage VGO
GO pin voltage VGO
3.6
3.4
3.2
3.0
2.8
2.6
2.4
VGO=0V
5mA
VGO=0V
5mA
0.1mA
0.1mA
0.1mA
Output Current IOUT
Output Voltage VOUT
0.1mA
Output Current IOUT
Output Voltage VOUT
Supply Current ISS
Supply Current ISS
Time (1msec/div)
Time (1msec/div)
<Low ESR capacitor>
With the XC6207 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 when the setting output voltage (VOUT(T)) is less than or equal to
1.8V. Also, when the setting output voltage (VOUT(T)) is less than or equal to 2.5V, please connect an input capacitor
(CIN) of 2.2μF between the VIN pin and the VSS pin in order to ensure a stable power input.
<Recommended conditions of CIN and CL>
SETTING VOLTAGE
0.8V ~ 1.7V
CIN (μF)
1.0
CL (μF)
4.7
1.8V ~ 2.4V
1.0
1.0
2.5V ~ 5.0V
2.2
1.0
22
XC6207
Series
■OPERATIONAL EXPLANATION (Continued)
<CL Auto-Discharge Function>
XC6207B series can quickly discharge the stored charge at the output capacitor (CL), when a low signal to the CE pin,
which enables a whole IC circuit put into OFF state, is inputted via the N-channel transistor located between the VOUT pin
and the VSS pin (please refer to the block diagram). In this state, the application is protected from a glitch operation
caused by the stored charge at the output capacitor (CL). The CL auto- discharge resistance at this time depends on the
input voltage. Moreover, discharge time of the output capacitor (CL) is set by the CL auto-discharge resistance (R) and
the output capacitor (CL). By setting time constant of a CL auto-discharge resistance value [R] and an output capacitor
value (CL) as τ(τ=C x R), the output voltage after discharge via the N channel transistor is calculated by the following
formulas.
V = VOUT x e –t/
,
or t=τIn ( V / VOUT )
τ
( V : Output voltage after discharge, VOUT(E) : Output voltage, t: Discharge time,
τ: CL auto-discharge resistance R×Output capacitor (CL) value C)
INPUT VOLTAGE
CL AUTO-DISCHARGE RESISTANCE
750Ω (TYP.)
2.0V
3.0V
4.0V
5.0V
6.0V
550Ω (TYP.)
500Ω (TYP.)
480Ω (TYP.)
470Ω (TYP.)
(ex.) When input voltage: 4.0V, CL auto-discharge resistance: 500Ω (TYP.); output capacitor (CL): 10μF, VOUT:3.0V,
CE voltage=Changing from 4.0V to 0V (CE pin L level signal)
1τ(500μsec) after CE OFF signal is inputted, VOUT(E) becomes: 3.0V×0.368 = approx. 1.104V
2τ(1000μsec) after CE OFF signal is inputted, VOUT(E) becomes: 3.0V×0.135 = approx. 0.405V
3τ(1500μsec) after CE OFF signal is inputted, VOUT(E) becomes: 3.0V×0.050 = approx. 0.150V
4τ(2000μsec) after CE OFF signal is inputted, VOUT(E) becomes: 3.0V×0.018 = approx. 0.055V
23
XC6207 Series
■OPERATIONAL EXPLANATION (Continued)
<Current Limiter, Short-Circuit Protection>
The XC6207 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 XC6207 series. In shutdown mode,
output at the VOUT pin will be pulled down to the VSS level via R1 & R2. However, as for the XC6207B 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
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 IC will operate normally. However, supply current may increase as a
result of through current in the IC's internal circuitry when 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 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
24
XC6207
Series
■TEST CIRCUITS
Circuit 1
Output Voltage, Input Operating Voltage, Dropout Voltage, Line Regulation, Load Regulation, Limit Current, Short Current
VIN
IOUT
CE
VOUT
A
CIN
GO
VSS
V
CL
Circuit 2
Supply Current, Stand-by Current
VIN
VOUT
CE
CIN
GO
VSS
Circuit 3
Ripple Rejection Rate
V
VIN
CE
VIN={VOUT+1}VDD
+0.5Vp-pAC
VOUT
~
~
IOUT=30mA
GO
V
VSS
CL
Circuit 4
CE/GO, High & Low Level Voltage
Circuit 5
CE/GO, High & Low Level Current
VIN
VIN
ICEL
IGOL
ICEH
IGOH
A
VOUT
CE
A
A
VOUT
CE
CIN
VSS
VSS
GO
CIN
V
GO
VSS
VSS
CL
ISS
A
Circuit 6
HS/PS Switching Current, PS Switching Delay Time
Circuit 7
CL Auto-Discharge Resistance Current
VIN
VIN
IR
VOUT
A
A
CE
VOUT
ISS
CE
1uF
CIN
GO
VSS
VSS
VSS
VSS
GO
V
1uF
A
25
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