UC3500L-25-AB3-R [UTC]
Switching Regulator, 150kHz Switching Freq-Max, CMOS, PSSO3, LEAD FREE, SOT-89, 3 PIN;
| 型号： | UC3500L-25-AB3-R |
| 厂家： | 
Unisonic Technologies |
| 描述： | Switching Regulator, 150kHz Switching Freq-Max, CMOS, PSSO3, LEAD FREE, SOT-89, 3 PIN |
| 文件： | 总11页 (文件大小：413K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
UNISONIC TECHNOLOGIES CO., LTD
UC3500
CMOS IC
HIGH EFFICIENCY VFM
CONTROLLED STEP-UP
DC/DC CONVERTER
DESCRIPTION
The UTC UC3500 Step-up DC/DC converters are optimized
for applications that prioritize high efficiency and high frequency.
The efficiency is greatly improved by utilizing an internal VFM
controlled scheme that switches with fixed frequency and is
adjustable up to more than 150 KHz depending on the load.
The UTC UC3500 requires only three external components
to realize the conversion from the battery voltage to the selected
output voltage in the range of 2.5V ~ 5.5V.
The start-up voltage of UTC UC3500 is guaranteed at 0.8V
and the device is operating down to 0.5V. The Output current is
guaranteed up to 150mA, while quiescent current is only 18μA.
FEATURES
* 0.8V start-up voltage
* 0.5V hold-on voltage
* Output current up to 150mA
* Low supply current of 18μA
* Wide output voltage range of 2.5V~5.5V
* High efficiency up to 88%
* Low profile and minimum external components
ORDERING INFORMATION
Ordering Number
Package
Packing
Lead Free
Halogen Free
UC3500L-xx-AB3-R
UC3500L-xx-AE3-R
UC3500L-xx-AF5-R
UC3500G-xx-AB3-R
UC3500G-xx-AE3-R
UC3500G-xx-AF5-R
SOT-89
SOT-23
SOT-25
Tape Reel
Tape Reel
Tape Reel
www.unisonic.com.tw
Copyright © 2013 Unisonic Technologies Co., Ltd
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QW-R502-072,H
UC3500
CMOS IC
MARKING INFORMATION
PACKAGE
VOLTAGE CODE
MARKING
SOT-25
25:2.5V
27:2.7V
28:2.8V
30:3.0V
33:3.3V
36:3.6V
40:4.0V
50:5.0V
3
U3XX
SOT-23
SOT-89
L: Lead Free
G: Halogen Free
Voltage Code
2
1
PIN CONFIGURATION
NC
4
NC
5
1
2
3
GND
OUT
LX
SOT-25
SOT-23
SOT-89
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QW-R502-072.H
UC3500
CMOS IC
BLOCK DIAGRAM
OUT
OUT
LX
OSCILLATOR
ERROR
AMPLIFIER
VFM
CONTROL
VREF
VIX LIMITER
GND
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QW-R502-072.H
UC3500
CMOS IC
ABSOLUTE MAXIMUM RATING
PARAMETER
SYMBOL
VOUT
VIN
RATINGS
UNIT
Output Voltage
Input Voltage
LX Pin Voltage
7
V
V
V
7
VLX
7
LX Pin Output Current
ILX
Internally limited
SOT-23/SOT-25
SOT-89
160
500
Power Dissipation at 25°С
mW
PD
SOT-23/SOT-25
SOT-89
1.6
Derating Rate TA>25°С
°С/mW
5
Operating Temperature
Storage Temperature
TOPR
TSTG
-25 ~ +85
-65 ~ +150
°С
°С
Note: Absolute maximum ratings are those values beyond which the device could be permanently damaged.
Absolute maximum ratings are stress ratings only and functional device operation is not implied.
ELECTRICAL CHARACTERISTICS (TA = 25°С, unless otherwise specified.)
UC3500-2.5V (VIN = 1.4V)
PARAMETER
SYMBOL
VOUT
TEST CONDITIONS
IOUT = 10mA
MIN
2.4
TYP
2.5
0.7
0.8
0.6
0.5
18
MAX UNIT
Output Voltage
2.6
1.1
1.2
V
V
IOUT = 0
Start-up Voltage (VIN-VF) (Note)
Hold-on Voltage
VSTART
IOUT = 1mA
V
IOUT = 0
0.4
V
VHOLD
ISUPPLY
RLX
ILX(LEAK)
fOSC
IOUT = 1mA
0.25
V
Supply Current
IOUT = 0
µA
mΩ
µA
KHz
%
Internal Switch RDS(ON)
Internal Leakage Current
Maximum Oscillator Frequency
Oscillator Duty Cycle
ILX = 100mA
VLX = 4V, VOUT = 2.8V
IOUT = 10mA
to be measure on LX pin
760
0.1
150
75
0.3
Dty
I
OUT = 10mA
81
%
Efficiency
η
IOUT = 50mA
83
%
IOUT = 100mA
82
%
UC3500-2.7V (VIN = 1.6V)
PARAMETER
SYMBOL
VOUT
TEST CONDITIONS
MIN
2.6
TYP
2.7
0.7
0.8
0.6
0.5
18
MAX UNIT
Output Voltage
IOUT = 10mA
IOUT = 0
2.8
1.1
1.2
V
V
Start-up Voltage (VIN-VF) (Note)
Hold-on Voltage
VSTART
IOUT = 1mA
V
IOUT = 0
0.4
V
VHOLD
ISUPPLY
RLX
ILX(LEAK)
fOSC
IOUT = 1mA
0.25
V
Supply Current
IOUT = 0
µA
mΩ
µA
KHz
%
Internal Switch RDS(ON)
Internal Leakage Current
Maximum Oscillator Frequency
Oscillator Duty Cycle
ILX = 100mA
VLX = 4V, VOUT = 3.0V
IOUT = 10mA
to be measure on LX pin
760
0.1
150
75
0.3
Dty
I
OUT = 10mA
82
%
Efficiency
η
IOUT = 50mA
83
%
IOUT = 100mA
82
%
UNISONIC TECHNOLOGIES CO., LTD
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4 of 11
QW-R502-072.H
UC3500
CMOS IC
ELECTRICAL CHARACTERISTICS(Cont.)
UC3500-2.8V (VIN = 1.7V)
PARAMETER
SYMBOL
VOUT
TEST CONDITIONS
IOUT = 10mA
MIN
2.7
TYP
2.8
0.7
0.8
0.6
0.5
18
MAX UNIT
Output Voltage
2.9
1.1
1.2
V
V
IOUT = 0
Start-up Voltage (VIN-VF) (Note)
Hold-on Voltage
VSTART
IOUT = 1mA
V
IOUT = 0
0.4
V
VHOLD
ISUPPLY
RLX
ILX(LEAK)
fOSC
IOUT = 1mA
0.25
V
Supply Current
IOUT = 0
µA
mΩ
µA
KHz
%
Internal Switch RDS(ON)
Internal Leakage Current
Maximum Oscillator Frequency
Oscillator Duty Cycle
ILX = 100mA
VLX = 4V, VOUT = 3.1V
IOUT = 10mA
to be measure on LX pin
760
0.1
150
75
0.3
Dty
I
OUT = 10mA
82
%
Efficiency
η
IOUT = 50mA
83
%
IOUT = 100mA
82
%
UC3500-3.0V (VIN = 1.8V)
PARAMETER
SYMBOL
VOUT
TEST CONDITIONS
MIN
2.9
TYP
3
MAX UNIT
Output Voltage
IOUT = 10mA
IOUT = 0
3.1
1.1
1.2
V
V
0.7
0.8
0.6
0.5
18
Start-up Voltage (VIN-VF) (Note)
Hold-on Voltage
VSTART
IOUT = 1mA
V
IOUT = 0
0.4
V
VHOLD
ISUPPLY
RLX
ILX(LEAK)
fOSC
IOUT = 1mA
0.25
V
Supply Current
IOUT = 0
µA
mΩ
µA
KHz
%
Internal Switch RDS(ON)
Internal Leakage Current
Maximum Oscillator Frequency
Oscillator Duty Cycle
ILX = 100mA
VLX = 4V, VOUT = 3.3V
IOUT = 10mA
to be measure on LX pin
IOUT = 10mA
IOUT = 50mA
IOUT = 100mA
750
0.1
150
75
0.3
Dty
82
%
Efficiency
η
84
%
82
%
UC3500-3.3V (VIN = 2.0V)
PARAMETER
SYMBOL
VOUT
TEST CONDITIONS
IOUT = 10mA
MIN
3.2
TYP
3.3
0.7
0.8
0.6
0.5
18
MAX UNIT
Output Voltage
3.4
1.1
1.2
V
V
IOUT = 0
Start-up Voltage (VIN-VF) (Note)
Hold-on Voltage
VSTART
IOUT = 1mA
V
IOUT = 0
0.4
V
VHOLD
ISUPPLY
RLX
ILX(LEAK)
fOSC
IOUT = 1mA
0.25
V
Supply Current
IOUT = 0
µA
mΩ
µA
KHz
%
Internal Switch RDS(ON)
Internal Leakage Current
Maximum Oscillator Frequency
Oscillator Duty Cycle
ILX = 100mA
750
0.1
150
75
VLX = 4V, VOUT = 3.6V
IOUT = 10mA
0.3
Dty
to be measure on LX pin
I
OUT = 10mA
83
%
Efficiency
η
IOUT = 50mA
85
%
IOUT = 100mA
84
%
UNISONIC TECHNOLOGIES CO., LTD
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5 of 11
QW-R502-072.H
UC3500
CMOS IC
ELECTRICAL CHARACTERISTICS(Cont.)
UC3500-3.6V (VIN =2.2V)
PARAMETER
SYMBOL
VOUT
TEST CONDITIONS
IOUT = 10mA
MIN
3.49
TYP
3.6
0.7
0.8
0.6
0.5
18
MAX UNIT
Output Voltage
3.71
1.1
V
V
IOUT = 0
Start-up Voltage (VIN-VF) (Note)
Hold-on Voltage
VSTART
IOUT = 1mA
1.2
V
IOUT = 0
0.4
V
VHOLD
ISUPPLY
RLX
ILX(LEAK)
fOSC
IOUT = 1mA
0.25
V
Supply Current
IOUT = 0
µA
mΩ
µA
KHz
%
Internal Switch RDS(ON)
Internal Leakage Current
Maximum Oscillator Frequency
Oscillator Duty Cycle
ILX = 100mA
VLX = 4V, VOUT = 3.9V
IOUT = 10mA
to be measure on LX pin
750
0.1
150
75
0.3
Dty
I
OUT = 10mA
84
%
Efficiency
η
IOUT = 50mA
86
%
IOUT = 100mA
85
%
UC3500-4.0V (VIN =2.4V)
PARAMETER
SYMBOL
VOUT
TEST CONDITIONS
MIN
3.88
TYP
4.0
0.7
0.8
0.6
0.5
19
MAX UNIT
Output Voltage
IOUT = 10mA
IOUT = 0
4.12
1.1
V
V
Start-up Voltage (VIN-VF) (Note)
Hold-on Voltage
VSTART
IOUT = 1mA
1.2
V
IOUT = 0
0.4
V
VHOLD
ISUPPLY
RLX
ILX(LEAK)
fOSC
IOUT = 1mA
0.25
V
Supply Current
IOUT = 0
µA
mΩ
µA
KHz
%
Internal Switch RDS(ON)
Internal Leakage Current
Maximum Oscillator Frequency
Oscillator Duty Cycle
ILX = 100mA
VLX = 4V, VOUT = 4.3V
IOUT = 10mA
to be measure on LX pin
IOUT = 10mA
IOUT = 50mA
IOUT = 100mA
740
0.1
150
75
0.3
Dty
85
%
Efficiency
η
87
%
85
%
UC3500-5.0V (VIN = 3.0V)
PARAMETER
SYMBOL
VOUT
TEST CONDITIONS
IOUT = 10mA
MIN
4.85
TYP
5.0
0.7
0.8
0.6
0.5
19
MAX UNIT
Output Voltage
5.15
1.1
V
V
IOUT = 0
Start-up Voltage (VIN-VF) (Note)
Hold-on Voltage
VSTART
IOUT = 1mA
1.2
V
IOUT = 0
0.4
V
VHOLD
ISUPPLY
RLX
ILX(LEAK)
fOSC
IOUT = 1mA
0.25
V
Supply Current
IOUT = 0
µA
mΩ
µA
KHz
%
Internal Switch RDS(ON)
Internal Leakage Current
Maximum Oscillator Frequency
Oscillator Duty Cycle
ILX = 100mA
730
0.1
150
75
VLX = 4V, VOUT = 5.3V
IOUT = 10mA
0.3
Dty
to be measure on LX pin
I
OUT = 10mA
86
%
Efficiency
η
IOUT = 50mA
88
%
IOUT = 100mA
85
%
Note: VF references to the forward voltage of the diode.
UNISONIC TECHNOLOGIES CO., LTD
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6 of 11
QW-R502-072.H
UC3500
CMOS IC
PRINCIPLE OF OPERATION
The UTC UC3500 consists of a Band-Gap reference voltage source, error amplifier, VFM control logic core,
oscillator, VLX limiter amplifier, N-channel MOSFET switching transistor and output voltage divider network.
The device compares the Band-Gap reference voltage with the feedback voltage from the output through divider
network. In TON phase, the energy is transferred from the battery to the inductor. The switch is turned off after a
maximum on time set to 2.5µs. In TOFF phase, the energy stored in the inductor is transferred to the load. This
process is continuously performed to ensure stable output voltage. Until the output voltage reaches the expected
value.
Therefore, in case of light load, the device works in PFM mode. In heavy load condition, the device works in
continuous mode, the frequency range up to a maximum 150 KHz set by the built in oscillator. In over current
conditions, the Ton time is shorted; the switching frequency will be higher than 150 KHz.
TYPICAL APPLICATION CIRCUIT
RECONMMENDED COMPONENTS
：47μH (Sunida CD54 Fosc＝500kHz)
：MA737, or MBRM110L
L
D
：10V 4.7μF (Tantalum)
：16V 47μF (Tantalum)
CIN
COUT
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7 of 11
QW-R502-072.H
UC3500
CMOS IC
TYPICAL CHARACTERISTICS
UC3500-2.5V
Output Waveform of LX
Output Waveform of LX
4
3
2
1
0
4
3
2
1
0
3
2
1
0
3
2
1
0
50
50
0
0
-50
-50
0
25 50
100 125
175 200 225
225
50 75 100 125 150 175 200 250
75
150
250
0
25
Time(ms)
Time(µs)
IOUT=1mA
IOUT=10mA
Output Waveform of LX Under
Maximum Frenquency
4
3
2
1
0
-1
0
5
10
15
20
25
f
ocs=166kHz,
Time(µs)
Dty:83%
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
8 of 11
QW-R502-072.H
UC3500
CMOS IC
TYPICAL CHARACTERISTICS(Cont.)
UC3500-2.7V
Output Waveform of LX
Output Waveform of LX
4
3
2
1
0
4
3
2
1
0
3
2
1
0
3
2
1
0
50
50
0
0
-50
-50
0
25 50
100 125
175 200 225
225
50 75 100 125 150 175 200 250
75
150
250
0
25
Time(ms)
Time(µs)
IOUT=1mA
IOUT=10mA
Output Waveform of LX Under
Maximum Frenquency
4
3
2
1
0
-1
0
5
10
15
20
25
focs=166kHz,
Dty:83%
Time(µs)
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www.unisonic.com.tw
9 of 11
QW-R502-072.H
UC3500
CMOS IC
TYPICAL CHARACTERISTICS(Cont.)
UC3500-3.3V
Output Waveform of LX
Output Waveform of LX
4
3
2
1
0
4
3
2
1
0
3
2
1
0
3
2
1
0
50
50
0
0
-50
-50
0
25 50
100 125
175 200 225
225
50 75 100 125 150 175 200 250
75
150
250
0
25
Time(ms)
Time(µs)
IOUT=1mA
IOUT=10mA
UNISONIC TECHNOLOGIES C, LTD
www.unisonic.com.tw
10 of 11
QW-R502-072.H
UC3500
CMOS IC
UTC assumes no responsibility for equipment failures that result from using products at values that
exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges, or
other parameters) listed in products specifications of any and all UTC products described or contained
herein. UTC products are not designed for use in life support appliances, devices or systems where
malfunction of these products can be reasonably expected to result in personal injury. Reproduction in
whole or in part is prohibited without the prior written consent of the copyright owner. The information
presented in this document does not form part of any quotation or contract, is believed to be accurate
and reliable and may be changed without notice.
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
11 of 11
QW-R502-072.H
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