CYT2606L20T [ETC]
PFM Step-Up DC-DC Converter; PFM升压型DC -DC转换器型号: | CYT2606L20T |
厂家: | ETC |
描述: | PFM Step-Up DC-DC Converter |
文件: | 总8页 (文件大小:274K) |
中文: | 中文翻译 | 下载: | 下载PDF数据表文档文件 |
CYT2606L
PFM Step-Up DC-DC Converter
Features
General Description
ꢀ400KHz Maximum Operation Frequency
ꢀ2.0V to 5.0V Output Voltage With 0.1V Step
ꢀLow Start-up Voltage: 0.8V at 1mA
ꢀ±2% Output Voltage Accuracy
ꢀUp to 88% Efficiency
The CYT2606L Series are PFM step-up DC-DC
converters with very low ripple noise due to the
high operation frequency. The maximum
operation frequency is 400KHz.
Only three components are required to realize the
conversion from the battery voltage to a selected
output voltage.
ꢀOutput current: 300mA at 2.5V input, 3.3V
output
A driver pin (EXT) is provided for driving
external power transistor to extend the output
current capability where large current is required.
ꢀLow Ripple and Low Noise
ꢀOutput Current Extendable by External
Switch
Enable pin (EN) is also provided so that the
circuit can be powered down.
Applications
ꢀPower source for applications where a higher
voltage than the battery voltage is required
Ordering Information
ꢀOne to three cell battery devices
ꢀPower source for cameras, camcorders,
VCRs, PDAs, pagers and hand held
communication instrument
Typical Applications
1 of 1
CYT2606L
Block Diagram
Current
limiting
comparator
VOUT
-
+
LX
Error
Amplifier
EXT
buffer
PFM
control
+
-
1.24V
bandgap
OSC
400KHz
Chip
Enable
EN
GND
Pin Assignment
Pin
Part Marking and Package Type
Description
Name
CYT2606L
CYT2606L
LXXF
CYT2606L
LXXE
CYT2606L
EXXT
CYT2606L
EXXF
CYT2606L
EXXE
LXXT
SOT-23-3
SOT-23-5
SOT-89
SOT-23-3
SOT-23-5
SOT-89
LX
EXT
VOUT
EN
2
-
5
-
3
-
-
2
3
-
-
-
3
2
-
Switching pin
5
2
1
4
3
Buffer output for external transistor
Output voltage
3
-
2
1
4
3
2
-
Chip enable (active high)
Ground
GND
NC
1
-
1
-
1
-
1
-
No connection
2 of 2
CYT2606L
Absolute Maximum Ratings
Type
Symbol
Description
Value
Unit
V
Vmax
Maximum voltage on VOUT and VLX pins
Voltage range on EXT and EN pins
Maximum current on LX pin
8
Voltage
Vmin-max
ILXmax
IEXTmax
Psot-23-3
Psot-23-5
Psot-89
-0.3-VOUT+0.3
1000
V
mA
mA
W
Current
Maximum current on EXT pin
100
Maximum Power dissipation for SOT-23-3 package
Maximum Power dissipation for SOT-23-5 package
Maximum Power dissipation for SOT-89 package
Operation temperature range
0.25
Power dissipation
0.25
W
0.5
W
Tmin-max
Tstorage
VESD
-20-85
-40-165
2000
oC
oC
V
Thermal
ESD
Storage temperature range
ESD voltage for human body mode
Electronic Characteristics
Parameter
Symbol
Test Condition
Min
-2
Typ
Max
Unit
%
2
Output voltage accuracy
Maximum input voltage
Start-up voltage
△VOUT
VINMAX
VSTART
0.7
VOUT
0.85
V
V
ILOAD=1mA, VIN:0→2V
ILOAD=1mA, VIN:2→0V
VHOLD
0.6
V
Hold-on voltage
FMAX
DCOSC
η
350
75
400
80
450
85
KHz
%
Maximum oscillation frequency
Oscillator duty cycle
Efficiency
85
88
%
600
800
1000
mA
Current limit
ILIMIT
VIN=1.8V VOUT=3.0V
VIN=1.8V VOUT=5.0V
No load, EN=“low”
20
25
uA
uA
uA
V
Input current at no load
IIN0
1
Input standby current
EN “High” voltage level
EN “low” level
IINQ
0.4*VOUT
0.2
0.1
V
uA
uA
mA
EN “high” input current
EN “low” input current
EXT output current
-0.1
-5
5
3 of 3
CYT2606L
Typical Characteristics (Using Internal Switch Transistor)
Start-up/Hold-on vs. Output Current
3
2.5
2
1.5
Start-up
1
L=47uH
C=47uF
0.5
Hold-on
0
1
10
100
Output Current(mA)
1000
Output Voltage vs. Output Current
4
3.5
3
3V
2V
2.5V
1.5V
2.5
2
1V
L=47uH
C=47uF
VOUT=3.4
1.5
0
50
100
150
200
250
300
350
Output Current (mA)
4 of 4
CYT2606L
Efficiency vs. Output Current
90
88
86
84
82
80
78
76
74
72
3V
2.5V
2V
L=47uH
C=47uF
VOUT=3.4V
1V
1.5V
1
10
100
1000
Output Current(mA)
Output Current vs. Ripple Voltage
250
200
150
100
50
3V
2.5V
2V
L=47uH
C=47uF
1.5V
VOUT=3.4V
1V
0
0
50
100
150
200
250
300
350
Output Current (mA)
5 of 5
CYT2606L
Output Current vs. Ripple Voltage
80
70
60
50
40
30
20
10
0
2V
3V
2.5V
1.5V
1V
L=47uH
C=2*47uF
VOUT=3.4V
0
50
100
150
200
250
300
350
Output Current (mA)
Output Current vs. Ripple Voltage
70
60
50
40
30
20
10
0
3V
2V
2.5V
L=47uH
C=3*47uF
VOUT=3.4V
1.5V
1V
0
50
100
150
200
250
300
350
Output Current (mA)
6 of 6
CYT2606L
Package Information
Dimensions In Millimeters
Dimensions In Inches
Min Max
0.041 0.049
Symbol
Min
Max
A
A1
A2
B
1.050
0.000
1.050
0.300
0.100
1.250
0.100
1.150
0.400
0.200
0.000
0.041
0.012
0.004
0.004
0.045
0.016
0.008
c
D
2.820
3.020
0.111
0.119
E
E1
1.500
2.650
1.700
2.950
0.059
0.104
0.067
0.116
e
e1
L
0.950TYP
0.037TYP
0.071
0.028REF
0.012
8ٛ
1.800
2.000
0.079
0.024
0.700REF
0.300
08ٛ
L1
?
0.600
ٛٛ0
7 of 7
CYT2606 L
Symbol
Min
Max
Min
Max
A
b
b1
c
1.400
0.320
0.400
0.350
4.400
1.600
0.520
0.580
0.440
4.600
0.055
0.013
0.016
0.014
0.173
0.063
0.197
0.023
0.017
0.181
D
D1
E
E1
e
1.550 REF
0.061 REF
2.300
3.940
2.600
4.250
0.091
0.155
0.102
0.167
1.500 TYP
3.000 TYP
0.060TYP
0.118TYP
e1
L
0.900
1.200
0.035
0.047
8 of 8
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