P1482_17 [UTC]
SYNCHRONOUS RECTIFIED STEP-DOWN CONVERTER;
| 型号： | P1482_17 |
| 厂家： | 
Unisonic Technologies |
| 描述： | SYNCHRONOUS RECTIFIED STEP-DOWN CONVERTER |
| 文件： | 总5页 (文件大小：233K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
UNISONIC TECHNOLOGIES CO., LTD
P1482
LINEAR INTEGRATED CIRCUIT
2A, 18V, 340KHZ
SYNCHRONOUS RECTIFIED
STEP-DOWN CONVERTER
DESCRIPTION
The UTC P1482 is a synchronous buck regulator. The device
provides 2A of continuous load current over a wide input voltage
of 6V~18V. Current mode control provides fast transient response
and cycle-bycycle current limit. An adjustable soft-start prevents
inrush current at turn-on.
SOP-8
The UTC P1482 can provide low-ripple power, high efficiency,
and perfect transient characteristics. The duty ratio varies linearly
from 0% to 92% in the PWM control. The error amplifier circuit
and soft-start circuit included in this device can prevent overshoot
at startup. An enable function, an over current protect (OCP)
function and short circuit protect (SCP) are also build inside, and
when OCP happens, the operation frequency will be reduced.
FEATURES
* 2A Output Current
* Wide 6V~18V Operating Input Range
* Integrated Power MOSFET Switches
* Programmable Soft-Start
* Stable with Low ESR Ceramic Output Capacitors
* Fixed 340KHz Frequency
* Cycle-by-Cycle Over Current Protection
ORDERING INFORMATION
Ordering Number
Package
SOP-8
Packing
Lead Free
Halogen Free
P1482G-S08-R
P1482L-S08-R
Tape Reel
MARKING
www.unisonic.com.tw
Copyright © 2017 Unisonic Technologies Co., Ltd
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QW-R103-057.K
P1482
LINEAR INTEGRATED CIRCUIT
PIN CONFIGURATION
PIN DESCRIPTION
PIN NO.
PIN NAME
NC
DESCRIPTION
1
2
3
4
5
6
7
8
No Bonding
VIN
IC power supply pin.
Power Switching Output.
Ground.
SW
GND
FB
Feedback Input.
Compensation Node.
Enable Input.
COMP
EN
SS
Soft-Start Control Input.
BLOCK DIAGRAM
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P1482
LINEAR INTEGRATED CIRCUIT
ABSOLUTE MAXIMUM RATING (TA=25°C, unless otherwise specified)
PARAMETER
SYMBOL
VIN
RATINGS
-0.3 ~ +18
18
UNIT
V
Supply Voltage
Switch Node Voltage
All Other Pins
VSW
V
-0.3 ~ +6
Internally Limited
150
V
Continuous Power Dissipation
Junction Temperature
Storage Temperature
PD
TJ
W
°C
°C
TSTG
-65 ~ +150
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.
THERMAL DATA
PARAMETER
SYMBOL
RATING
143
UNIT
°C/W
Junction to Ambient
Note: Surface mounted on 1 in 2 copper pad of FR4 board.
θJA
RECOMMENDED OPERATING CONDITIONS
PARAMETER
SYMBOL
VIN
RATING
6 ~ 18
UNIT
V
Input Voltage
Output Voltage
VOUT
0.923 ~ 15
-40 ~ +85
V
Ambient Operating Temperature
TOPR
°C
Note: The device is not guaranteed to function outside of its operating conditions.
ELECTRICAL CHARACTERISTICS (VIN=12V, TA=25°C, unless otherwise specified)
PARAMETER
SYMBOL
TEST CONDITIONS
VEN=2.0V, VFB=1.0V
MIN TYP MAX UNIT
Supply Current
3.5
5
mA
V
Feedback Voltage
VFB
6V ≤VIN ≤18V
0.900 0.923 0.946
High-Side Switch On Resistance (Note 1)
Low-Side Switch On Resistance (Note 1)
High-Side Switch Leakage Current
Upper Switch Current Limit
Lower Switch Current Limit
COMP to Current Sense
RDS(ON)1
RDS(ON)2
110
100
10
mΩ
mΩ
μA
A
VEN=0V, VSW=0V
Minimum Duty Cycle
From Drain to Source
2.4
3.4
1.1
A
GCS
5
A/V
Transconductance
Oscillation Frequency
FOSC1
FOSC2
DMAX
300 365 430 KHz
Short Circuit Oscillation Frequency
Maximum Duty Cycle
VFB=0V
40
92
0.9
4
KHz
%
VFB=1.0V
VEN Rising
VIN Rising
VSS=0V
EN Shutdown Threshold Voltage
Input Under Voltage Lockout Threshold
Soft-Start Current
0.7
2.0
V
V
15
160
μA
°C
Thermal Shutdown (Note)
Note: Guaranteed by design, not tested.
UNISONIC TECHNOLOGIES CO., LTD
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P1482
LINEAR INTEGRATED CIRCUIT
TYPICAL APPLICATION CIRCUIT
R
BF2
V
0.923(1
)
O
NC
VIN
SS
R
BF1
CSS
0.1µF
100k
EN
CIN
22µF
+
V1
12
-
UTC
P1482
SW
COMP
RC
3.3V/2A
L1 10µH
8.2K
CO1
option
RBF2
26.1k
CSW
option
CO2
3.3n
GND
FB
RBF1
10k
COUT
22µF
300pF
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P1482
LINEAR INTEGRATED CIRCUIT
TYPICAL CHARACTERISTICS
SCP SW Wave
VIN=18V
SW Wave
VIN=18V, ILOAD=2A
5V
0
5V
0
0
50
100
0
12.5
25
Time (10μs/div)
Time (2.5μs/div)
Efficiency vs. Load Current
100
90
VCC =18V
80
VCC =12V
VCC =7V
70
60
50
40
30
20
0
0.5
Load Current, ILOAD (A)
1
1.5
2
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
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