P1986G-S08-R [UTC]
PWM CONTROL 3A STEP-DOWN CONVERTER; PWM控制3A降压转换器
| 型号： | P1986G-S08-R |
| 厂家： | 
Unisonic Technologies |
| 描述： | PWM CONTROL 3A STEP-DOWN CONVERTER |
| 文件： | 总6页 (文件大小：196K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
UNISONIC TECHNOLOGIES CO., LTD
P1986
LINEAR INTEGRATED CIRCUIT
PWM CONTROL 3A
STEP-DOWN CONVERTER
DESCRIPTION
The UTC P1986 consists of 3A step-down switching
regulator with PWM control which includes a reference voltage
source, oscillation circuit, error amplifier, internal PMOS and etc.
The UTC P1986 can provide low-ripple power, high
efficiency, and perfect transient characteristics. The duty ratio
varies linearly from 0% to 100% in the PWM control. The error
amplifier circuit and soft-start circuit included in this device can
prevent overshoot at startup. Internally, the build-in compensation
block can reduce external component count. 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.
In application, the UTC P1986 is suitable for portable devices
when it works as an ideal power supply in SOP-8L package.
There is an internal P-channel power MOS, a coil, capacitors
inside and a diode connected externally that makes these ICs
step-down switching regulators.
FEATURES
* Input voltage varies from 3.6V to 28V
* Output voltage varies from 0.8V to VCC
* Duty ratio varies from 0% to 100% PWM control
* With 330kHz typical oscillation frequency
* Thermal shutdown and SCP function and soft-start, current limit,
enable function
* Low ESR output capacitor(Multi-layer chip capacitor) application
* Built-in switch P-channel power MOS
* Halogen Free
ORDERING INFORMATION
Ordering Number
Package
SOP-8
Packing
Lead Free
Halogen Free
P1986G-S08-R
P1986L-S08-R
Tape Reel
www.unisonic.com.tw
Copyright © 2011 Unisonic Technologies Co., Ltd
1 of 6
QW-R103-046.C
P1986
LINEAR INTEGRATED CIRCUIT
PIN CONFIGURATION
1
2
3
4
8
VSS
VSS
SW
SW
FB
EN
7
6
5
COMP
VCC
PIN DESCRIPTION
PIN NO.
PIN NAME
FB
DESCRIPTION
1
Feedback pin
Power-off pin
2
EN
H: normal operation (Step-down)
L: Step-down operation stopped (All circuits deactivated)
Compensation pin
3
4
5
6
7
8
COMP
VCC
IC power supply pin
SW
Switch pin. Connect external inductor/diode here.
Switch pin. Connect external inductor/diode here.
GND pin
SW
VSS
VSS
GND pin
UNISONIC TECHNOLOGIES CO., LTD
2 of 6
QW-R103-046.C
www.unisonic.com.tw
P1986
LINEAR INTEGRATED CIRCUIT
BLOCK DIAGRAM
VCC
EN
COMP
Reference
Voltage
Current
Limit
EN
Lateh
Driver
PWM
FB
SS
SW
VREF
OSC
VSS
UNISONIC TECHNOLOGIES CO., LTD
3 of 6
QW-R103-046.C
www.unisonic.com.tw
P1986
LINEAR INTEGRATED CIRCUIT
ABSOLUTE MAXIMUM RATING (Ta=25°C, unless otherwise specified )
PARAMETER
SYMBOL
VCC
RATINGS
VSS -0.3 ~VSS +30
VSS -0.3 ~ VCC
VSS - 0.3 ~ VCC+ 0.3
VSS - 0.3 ~ VCC+ 0.3
+3.6 ~ 28
UNIT
V
VCC Pin Voltage
Feedback Pin Voltage
ON/OFF Pin Voltage
Switch Pin Voltage
VFB
V
VEN
V
VSW
V
Operating Supply Voltage
Power Dissipation
VOP
V
PD
Internally limited
-40 ~ +150
mW
°C
°C
Storage Temperature
Operating Temperature
TSTG
TOPR
-20 ~ +125
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
θJA
RATINGS
UNIT
°С/W
°С/W
Junction to Ambient
Junction to Case
70
25
θJC
Notes: θJA is measured with the PCB copper area(need connect to SW pins) of approximately 1 in2(Multi-layer)
ELECTRICAL CHARACTERISTICS (VIN = 12V, Ta= 25°C, unless otherwise specified.)
PARAMETER
SYMBOL
VFB
TEST CONDITIONS
IOUT=0.2A
MIN TYP MAX UNIT
Feedback Voltage
0.784 0.80 0.816
V
Feedback Bias Current
IFB(BIAS)
IOUT=0.1A
0.1
0.5
μA
Pear current, No outside circuit
VFB=0V Force driver on
Switch Current
ISW
4
A
V
EN=0V No outside circuit VFB=0V
Standby Current
ISTN-BY
2
3
10
5
μA
Force driver on
Quiescent Current
IQ
VFB=1.2V Force driver off
Measure waveform at SW Pin
mA
Oscillation Frequency
Frequency of Current Limit or Short
Circuit Protect
fOSC
260 330 400 KHz
fOSC1
Measure waveform at SW Pin
VCC=5V-28V, IOUT=0.2A
40
KHz
%
ΔVOUT
VOUT
ΔVOUT
VOUT
ISH
Line Regulation
Load Regulation
0.4
0.3
I
OUT=0.2A-3A
%
VEN=2.5V(ON)
VEN=0.3V(OFF)
5
0
μA
μA
ms
mΩ
mΩ
V
EN Pin Input Current
Soft-Start Time
ISL
TSS
0.3
1.6
3.5
8
VCC=5V,VFB=0V
130 150
Internal MOSFET RDS(ON)
RDS(ON)
VCC=12V,VFB=0V
High(regulator ON)
Low(regulator OFF)
80
100
VSH
VSL
EN Pin Logic input threshold voltage
Thermal shutdown Temp
0.8
V
TSD
140
°C
UNISONIC TECHNOLOGIES CO., LTD
4 of 6
QW-R103-046.C
www.unisonic.com.tw
P1986
LINEAR INTEGRATED CIRCUIT
TYPICAL APPLICATION CIRCUIT
MLCC
VCC (V)
C1 (nF)
C4 (μF)
33
C7 (nF)
2.2
C8 (μF)
0.1
R3 (Kꢀ)
10.3
7
1
1
1
12
19
33
2.2
0.1
10.96
5.94
33
10
0.1
UNISONIC TECHNOLOGIES CO., LTD
5 of 6
QW-R103-046.C
www.unisonic.com.tw
P1986
LINEAR INTEGRATED CIRCUIT
TYPICAL CHARACTERISTICS
VCC=19V, VOUT=0V
200
0
-200
20
VCC=19V, VOUT=5V, IOUT=3A
20
0
0
0
10
20
0
50
100
Time (2μs/div)
Time (10μs/div)
Efficiency vs. Load Current
VCC =7V
100
90
80
70
60
VCC =12V
VCC =19V
50
40
VOUT =5V
2.0
Load Current, ILOAD (A)
3.0
0.5
1.0
1.5
2.5
0
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
6 of 6
QW-R103-046.C
www.unisonic.com.tw
相关型号：
P1A105035KW0DE3
CAPACITOR, TANTALUM, SOLID, POLARIZED, 35 V, 1 uF, THROUGH HOLE MOUNT, RADIAL LEADED, ROHS COMPLIANT
VISHAY
P1A105035MV2D
CAPACITOR, TANTALUM, SOLID, POLARIZED, 35V, 1uF, THROUGH HOLE MOUNT, RADIAL LEADED
VISHAY
P1A105035MW0D
CAPACITOR, TANTALUM, SOLID, POLARIZED, 35V, 1uF, THROUGH HOLE MOUNT, RADIAL LEADED
VISHAY
P1A105035MW0DE3
CAPACITOR, TANTALUM, SOLID, POLARIZED, 35 V, 1 uF, THROUGH HOLE MOUNT, RADIAL LEADED, ROHS COMPLIANT
VISHAY
P1A154035K08DE3
CAPACITOR, TANTALUM, SOLID, POLARIZED, 35 V, 0.15 uF, THROUGH HOLE MOUNT, RADIAL LEADED, ROHS COMPLIANT
VISHAY
P1A154035M08DE3
CAPACITOR, TANTALUM, SOLID, POLARIZED, 35 V, 0.15 uF, THROUGH HOLE MOUNT, RADIAL LEADED, ROHS COMPLIANT
VISHAY
P1A154050KT0DE3
CAPACITOR, TANTALUM, SOLID, POLARIZED, 50V, 0.15uF, THROUGH HOLE MOUNT, RADIAL LEADED, ROHS COMPLIANT
VISHAY
P1A155025KC0DE3
CAPACITOR, TANTALUM, SOLID, POLARIZED, 25V, 1.5uF, THROUGH HOLE MOUNT, RADIAL LEADED, ROHS COMPLIANT
VISHAY
P1A155025MH0D
CAPACITOR, TANTALUM, SOLID, POLARIZED, 25V, 1.5uF, THROUGH HOLE MOUNT, RADIAL LEADED
VISHAY
P1A155025MT0DE3
CAPACITOR, TANTALUM, SOLID, POLARIZED, 25V, 1.5uF, THROUGH HOLE MOUNT, RADIAL LEADED, ROHS COMPLIANT
VISHAY
©2020 ICPDF网 联系我们和版权申明