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P1484A 데이터시트 PDF




Unisonic Technologies에서 제조한 전자 부품 P1484A은 전자 산업 및 응용 분야에서
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부품번호 P1484A 기능
기능 SYNCHRONOUS RECTIFIED STEP-DOWN CONVERTER
제조업체 Unisonic Technologies
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P1484A 데이터시트, 핀배열, 회로
UNISONIC TECHNOLOGIES CO., LTD
P1484A
LINEAR INTEGRATED CIRCUIT
3A, 23V, 340KHZ
SYNCHRONOUS RECTIFIED
STEP-DOWN CONVERTER
„ DESCRIPTION
The UTC P1484A 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 P1484A 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
P1484AL-HS2-R
P1484AG-HS2-R
P1484AL-HS2-T
P1484AG-HS2-T
Package
HSOP-8
HSOP-8
HSOP-8
Packing
Tape Reel
Tube
www.unisonic.com.tw
Copyright © 2013 Unisonic Technologies Co., Ltd
1 of 6
QW-R103-063.A
Free Datasheet http://www.Datasheet4U.com




P1484A pdf, 반도체, 판매, 대치품
P1484A
LINEAR INTEGRATED CIRCUIT
„ ABSOLUTE MAXIMUM RATING (Note 1)
PARAMETER
SYMBOL
RATINGS
UNIT
Supply Voltage
Switch Node Voltage
VIN -0.3~+23
VSW
25
V
V
All Other Pins
-0.3~+6
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
VEN=0V, VSW=0V
Upper Switch Current Limit
Minimum Duty Cycle
Lower Switch Current Limit
From Drain to Source
COMP to Current Sense
Transconductance
GCS
Oscillation Frequency
FOSC1
Short Circuit Oscillation Frequency
Maximum Duty Cycle
FOSC2
DMAX
VFB=0V
VFB=1.0V
EN Shutdown Threshold Voltage
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-R103-063.A
Free Datasheet http://www.Datasheet4U.com

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