LV5980MC.pdf 데이터시트 (총 16 페이지) - 파일 다운로드 LV5980MC 데이타시트 다운로드

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Ordering number : ENA2104
LV5980MC
Bi-CMOS IC
Low power consumption
and high efficiency
Step-down Switching
Regulator
http://onsemi.com
Overview
LV5980MC is 1ch DCDC converter with built-in power Pch MOSFET. The recommended operating range is 4.5V to
23V. The maximum current is 3A. The operating current is about 63μA, and low power consumption is achieved.
Features and Functions
1ch SBD rectification DCDC converter IC with built-in power Pch MOSFET
Typical value of light load mode current is 63μA
4.5V to 23V Operating input voltage range
100mΩ High-side switch
Output voltage adjustable to 1.235V
The oscillatory frequency is 370kHz
built-in OCP circuit with P-by-P method
When P-by-P is generated continuously, it shifts to the HICCUP operation
External capacitor Soft-start
Under voltage lock-out, thermal shutdown
Applications
Set top boxes
Point of load DC/DC converters
White Goods
DVD/Blu-raydrivers and HDD
Office Equipment
LCD monitors and TVs
POS System
Application Circuit Example
VIN
C1
10μF
×2
C3
1μF
R1
47kΩ
C7 C6 C5
1μF 4.7nF 2.2nF
PDR
VIN L1 10μH
VOUT
SW
D1 R3 C2 5V
REF
LV5980MC
FB
COMP
10μF
×3
R2
SS/HICCUP
GND
C1: GRM31CB31E106K [murata]
C2: C2102JB0J106M [TDK]
L1: FDVE1040-100M [TOKO]
D1: SB3003CH [SANYO]
100 VOUT = 5V
90
80
70
Efficiency
VIN=8V
VIN=15V
VIN=12V
60
50
40
30
20
10
0
0.1 2 3 5 7 1 2 3 5 710 2 3 5 7100 2 3 5 71000 2 3 5 710000
Load current -- mA
Semiconductor Components Industries, LLC, 2013
August, 2013
N2112NKPC 20120801-S00003 No.A2104-1/16

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LV5980MC
Specifications
Absolute Maximum Ratings at Ta = 25°C
Parameter
Symbol
Conditions
Ratings
Unit
Input voltage
Allowable pin voltage
VIN max
VIN-SW
VIN-PDR
REF
25 V
30 V
6V
6V
SS/HICCUP
REF
V
FB
REF
V
COMP
REF
V
Allowable power dissipation
Pd max
Specified substrate *1
1.35
W
Operating temperature
Topr
-40 to +85
°C
Storage temperature
Tstg
-55 to +150
°C
*1 Specified substrate : 50.0mm × 50.0mm × 1.6mm, fiberglass epoxy printed circuit board, 4 layers
Note 1 : Absolute maximum ratings represent the values which cannot be exceeded for any length of time.
Note 2 : Even when the device is used within the range of absolute maximum ratings, as a result of continuous usage under high temperature, high current,
high voltage, or drastic temperature change, the reliability of the IC may be degraded. Please contact us for the further details.
Stresses exceeding Maximum Ratings may damage the device. Maximum Ratings are stress ratings only. Functional operation above the Recommended Operating
Conditions is not implied. Extended exposure to stresses above the Recommended Operating Conditions may affect device reliability.
Recommended Operating Conditions at Ta = 25°C
Parameter
Symbol
Conditions
Input voltage range
VIN
Ratings
4.5 to 23
Unit
V
Electrical Characteristics at Ta = 25°C, VIN = 15V
Parameter
Symbol
Conditions
min
Reference voltage
Internal reference voltage
Pch drive voltage
Saw wave oscillator
VREF
VPDR
IOUT = 0 to -5mA
1.210
VIN-5.5
Oscillatory frequency
Soft start circuit
FOSC
310
Soft start source current
Soft start sink current
UVLO circuit
ISS_SC
ISS_SK
VIN = 3V, SS = 0.4V
1.2
UVLO release voltage
UVLO lock voltage
Error amplifier
VUVLON
VUVLOF
FB = COMP
FB = COMP
3.3
3.02
Input bias current
Error amplifier gain
Output sink current
Output source current
Over current limit circuit
IEA_IN
GEA
IEA_OSK
IEA_OSC
FB = 1.75V
FB = 0.75V
-100
100
-30
8
Current limit peak
HICCUP timer start-up cycle
HICCUP comparator threshold voltage
HICCUP timer discharge current
PWM comparator
ICL
NCYC
VtHIC
IHIC
3.5
Maximum on-duty
Output
DMAX
94
Output on resistance
The entire device
RON
IO = 0.5A
Light load mode consumption current
Thermal shutdown
ISLEEP
TSD
No switching
Design guarantee *2
*2 : Design guarantee: Signifies target value in design. These parameters are not tested in an independent IC.
Ratings
typ
1.235
VIN-5.0
370
1.8
300
3.7
3.42
-10
220
-17
17
4.7
15
0.15
0.25
100
63
170
Unit
max
1.260
VIN-4.5
V
V
430 kHz
2.4 μA
μA
4.1 V
3.82 V
nA
380 μA/V
-8 μA
30 μA
6.2 A
cycle
V
μA
%
mΩ
83 μA
°C
No.A2104-2/16

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Package Dimensions
unit : mm (typ)
3424
4.9
8
12
1.27
0.42 0.2
SANYO : SOIC8
LV5980MC
Pd max – Ta
2.0
1.5
1.35
1.0
0.70
0.5
0
--40 --20
0
20 40 60 80
Ambient temperature, Ta -- °C
100
Specified substrate
Top Bottom
2nd/3rd layers
No.A2104-3/16

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Pin Assignment
LV5980MC
PDR 1
GND 2
SS/HICCUP 3
COMP 4
TOP VIEW
LV5980MC
SOIC8
8 SW
7 VIN
6 REF
5 FB
Pin Function Description
Pin No,
Pin Name
Function
1 PDR
2 GND
Pch MOSFET gate drive Voltage.
The bypass capacitor is necessarily connected between this pin and VIN.
Ground Pin. Ground pin voltage is reference voltage
3
SS/HICCUP
Capacitor connection pin for soft start and setting re-startup cycle in HICCUP mode.
About 1.8uA current charges the soft start capacitor.
4 COMP
Error Amplifier Output Pin.
The phase compensation network is connected between GND pin and COMP pin.
Thanks to current-mode control, comp pin voltage would tell you the output current amplitude. Comp pin is connected
internally to an Init.comparator which compares with 0.9V reference. If comp pin voltage is larger than
0.9V, IC operates in “continuous mode”. If comp pin voltage is smaller than 0.9V,
IC operates in “discontinuous mode (low consumption mode)”.
5 FB
Error amplifier reverse input pin.
ICs make its voltage keep 1.235V.
Output voltage is divided by external resistances and it across FB.
6 REF
Reference voltage.
7 VIN
Supply voltage pin.
It is observed by the UVLO function.
When its voltage becomes 3.7V or more, ICs startup in soft start.
8 SW
High-side Pch MOSFET drain Pin.
No.A2104-4/16

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Block Diagram
Wake-up
Band-gap
Bias
1.235V
LV5980MC
VIN
uvlo.comp
TSD
REF
enable Pch Drive
SS/HICCUP
HICCUP_SD
enable
HICCUP_SD
ILIM
Logic
SS_END.comp
ocp.comp
HICCUP_SD pwm comp
15pulse
counter
PbyP.comp
REF
PDR
FB
COMP
error.amp
slope
OSC
lnit.comp
clk
SQ
CKRQ
Level-shift
PDR
gnd
GND
SW
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