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UC3552 데이터시트 PDF




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부품번호 UC3552 기능
기능 PWM DC-DC CONVERTER
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UC3552 데이터시트, 핀배열, 회로
UNISONIC TECHNOLOGIES CO., LTD
UC3552
PWM DC-DC CONVERTER
WITH INTERNAL SWITCH AND
SOFT-START
„ DESCRIPTION
The UTC UC3552 is a step-up PWM DC-DC converter with a
internal switch which is 1.6A, 0.23. UTC UC3552 offers users
flexibility in determining loop dynamics and adjusting operating
frequency cause it’s equipped with an external compensation
pin ,and it also allows the use of small, low equivalent resistance
(ESR) ceramic output capacitors. UTC UC3552 is capable of
converting a standard input of 3.3V to multiple outputs of 8V, 8V ,
and 23V. Otherwise, filtering and loop performance are enhanced
and facilitated by a high switching frequency of either 640 kHz
or1.3MHz.
As a power-smart design in shutdown mode a soft-start with an
external capacitor that sets the input current ramp rate, reduces the
current consumption to 0.1μA. A mere 2.6V input yields an
impressive output voltage to 12V when operating.
„ FEATURES
* 1.6A, 0.23, internal switch
* High efficiency: 90%
* Adjustable output: VDD to 12V
* Adjustable frequency: 640kHz or 1.3MHz
* Wide input range: +2.6V ~ +5.5V
* Low shutdown current: 0.1μA
* Programmable soft-start
„ ORDERING INFORMATION
Ordering Number
Lead Free
Halogen Free
UC3552L-S08-R
UC3552G-S08-R
UC3552L-S08-T
UC3552G-S08-T
UC3552L-SM1-R
UC3552G-SM1-R
UC3552L-SM1-T
UC3552G-SM1-T
Package
SOP-8
SOP-8
MSOP-8
MSOP-8
CMOS IC
Packing
Tape Reel
Tube
Tape Reel
Tube
www.unisonic.com.tw
Copyright © 2013 Unisonic Technologies Co., Ltd
1 of 7
QW-R502-134.B




UC3552 pdf, 반도체, 판매, 대치품
UC3552
CMOS IC
„ ABSOLUTE MAXIMUM RATINGS
PARAMETER
SYMBOL
RATINGS
UNIT
SW to GND
-0.3 ~ +14
V
IN, SHDN , VDD , FREQ to GND
-0.3 ~ +6
V
SS, EO to GND
RMS SW Pin Current
-1.3V ~ (VDD+0.3V)
V
ISW 1.2 A
Continuous Power Dissipation (TC = 70°C)
SOP-8
MSOP-8
PD
350 mW
300 mW
Junction Temperature
TJ
+125
°C
Operating Temperature
TOPR
-20 ~ +85
°C
Storage Temperature
TSTG
-45 ~ +125
°C
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
TC = +25°C, VDD =SHDN = 3V, FREQ = GND, unless otherwise specified.)
PARAMETER
SYMBOL
TEST CONDITIONS
Input Supply Voltage
VDD Under Voltage Lockout
VDD
UVLO
When VDD is rising, typical hysteresis
is 40mV; SW remains off below this
level
Quiescent Current
Shutdown Current
IDD
VDD = 1.3V, not switching
VDD = 1.0V, switching
ISC SHDN = GND
ERROR AMPLIFIER
Feedback Voltage
VDD Input Bias Current
Feedback-Voltage Line
Regulation
Transconductance
Voltage Gain
VIN
II(BIAS)
gm
GV
Level to produce VEO = 1.24V
VIN= 1.24V
Level to produce VEO = 1.24V,
2.6V < VDD < 5.5V
ΔI = 5µA
OSCILLATOR
Frequency
Maximum Duty Cycle
fOSC
tDUTY
FREQ = GND
FREQ = VDD
FREQ = GND
FREQ = VDD
N-CHANNEL SWITCH
Current Limit
On-Resistance
Leakage Current
ILIMIT
RON
ILEAK
VDD = 1V, Duty Cycle = 65%
ISW = 1.2A
VSW = 12V
SOFT-START
Reset Switch Resistance
Charge Current
VSS = 1.2V
CONTROL INPUTS
Input Low Voltage
Input High Voltage
Hysteresis
VIL SHDN , FREQ; VDD = 2.6V ~ 5.5V
VIH SHDN , FREQ; VDD = 2.6V ~ 5.5V
SHDN , FREQ
FREQ Pull-Down Current
SHDN Input Current
IFREQ
ISHDN
MIN TYP MAX
2.6 5.5
2.25 2.38 2.52
0.21 0.35
1.2 5.0
0.1 10.0
1.22 1.240 1.258
0 40
0.05 0.15
70 105 240
1500
540
1100
79
640
1320
85
85
740
1600
92
1.2 1.6 2.3
0.23 0.50
0.01 20.00
300
1.5 4.0 7.0
0.3VDD
0.7VDD
0.1VDD
1.8 5.0 9.0
0.001 1.000
UNIT
V
V
mA
µA
V
nA
%/V
µA/V
V/V
kHZ
%
A
µA
µA
V
V
V
µA
µA
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
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QW-R502-134.B

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UC3552 전자부품, 판매, 대치품
UC3552
„ MULTIPLE-OUTPUT TFT LCD POWER SUPPLY
CMOS IC
150kΩ
SHDN
EO SS
18pF
27nF
V1 274kΩ
C5 C4
C3
3.3μF 3.3μF 3.3μF
UTC UC3552
IN FREQ
44.2kΩ
GND
VDD
SW
L1
D1
6.8μH
C2
0.47μF
VDD
C1 3.0V ~ 3.6V
3.3μF
V3
3.3μF
D4
1μF
0.1μF
0.1μF
D3
D2
V2
+26V
5mA
1μF
1μF
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
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QW-R502-134.B

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