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P1484 데이터시트 PDF




Unisonic Technologies에서 제조한 전자 부품 P1484은 전자 산업 및 응용 분야에서
광범위하게 사용되는 반도체 소자입니다.


 

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부품번호 P1484 기능
기능 SYNCHRONOUS RECTIFIED STEP-DOWN CONVERTER
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P1484 데이터시트, 핀배열, 회로
UNISONIC TECHNOLOGIES CO., LTD
P1484
LINEAR INTEGRATED CIRCUIT
3A, 23V, 340KHZ
SYNCHRONOUS RECTIFIED
STEP-DOWN CONVERTER
„ DESCRIPTION
The UTC P1484 is a synchronous buck regulator. The device
provides3A of continuous load current over a wide input voltage
of 5V~23V. Current mode control provides fast transient response
and cycle-bycycle current limit. An adjustable soft-start prevents
inrush current at turn-on
The UTC P1484 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
* 3A Output Current
* Wide 6V~23V 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
Lead Free
Halogen Free
P1484L-S08-R
P1484G-S08-R
P1484L-S08-T
P1484G-S08-T
Package
SOP-8
SOP-8
SOP-8
Packing
Tape Reel
Tube
www.unisonic.com.tw
Copyright © 2013 Unisonic Technologies Co., Ltd
1 of 6
QW-R103-060.B
Free Datasheet http://www.Datasheet4U.com




P1484 pdf, 반도체, 판매, 대치품
P1484
LINEAR INTEGRATED CIRCUIT
„ ABSOLUTE MAXIMUM RATING (Note 1)
PARAMETER
SYMBOL
RATINGS
UNIT
Supply Voltage
VIN -0.3~+23
V
Switch Node Voltage
All Other Pins
VSW
25
-0.3~+6
V
V
Continuous Power Dissipation (TA=25°C) (Note 2)
PD
1.4
W
Junction Temperature
TJ 150 °C
Storage Temperature
TSTG
-65~+150
°C
Notes: 1. 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.
2. The maximum allowable power dissipation is a function of the maximum junction temperature TJ (MAX),
the junction-to-ambient thermal resistance θJA, and the ambient temperature TA. The maximum allowable
continuous power dissipation at any ambient temperature is calculated by PD (MAX)=(TJ (MAX) - TA)/ θJA.
Exceeding the maximum allowable power dissipation will cause excessive die temperature, and the
regulator will go into thermal shutdown. Internal thermal shutdown circuitry protects the device from
permanent damage.
„ THERMAL DATA
PARAMETER
Junction to Ambient
Junction to Case
Notes: Measured on JESD5 1-7, 4-layer PCB.
SYMBOL
θJA
θJC
RATING
90
45
UNIT
°C/W
°C/W
„ RECOMMENDED OPERATING CONDITIONS
Input Voltage
VIN 6~23
Output Voltage
VOUT
0.923~18
Ambient Operating Temperature
TOPR
-40~+85
Notes: The device is not guaranteed to function outside of its operating conditions.
V
V
°C
„ ELECTRICAL CHARACTERISTICS (VIN=12V, TA=+25°C, unless otherwise specified)
PARAMETER
SYMBOL
TEST CONDITIONS
Supply Current
Feedback Voltage
VEN=2.0V, VFB=1.0V
VFB 6V VIN 23V
High-Side Switch On Resistance (Note 1) RDS(ON)1
Low-Side Switch On Resistance (Note 1) RDS(ON)2
High-Side Switch Leakage Current
Upper Switch Current Limit
VEN=0V, VSW=0V
Minimum Duty Cycle
Lower Switch Current Limit
From Drain to Source
COMP to Current Sense
Transconductance
GCS
Oscillation Frequency
Short Circuit Oscillation Frequency
FOSC1
FOSC2
VFB=0V
Maximum Duty Cycle
EN Shutdown Threshold Voltage
DMAX
VFB=1.0V
VEN Rising
Input Under Voltage Lockout Threshold
Soft-Start Current
VIN Rising
VSS=0V
Thermal Shutdown (Note 1)
Note: 1. Guaranteed by design, not tested.
MIN TYP MAX UNIT
3.5 5 mA
0.900 0.923 0.946 V
70 m
50 m
10 μA
3.4 A
1.1 A
5 A/V
305 340 375 KHz
40 KHz
92 %
0.8 1.2 2.0 V
4V
15 μA
160 °C
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
4 of 6
QW-R103-060.B
Free Datasheet http://www.Datasheet4U.com

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