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CYT2606L20E

型号：

CYT2606L20E

描述：

PFM升压型DC -DC转换器[ PFM Step-Up DC-DC Converter ]

品牌：

ETC[ ETC ]

页数：

8 页

PDF大小：

274 K

下载PDF手册
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  
V
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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