Ordering number : ENA2104
Bi-CMOS IC
LV5980MC
Overview
Low power consumption and high efficiency
Step-down Switching Regulator
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-ray drivers and HDD
•
Office Equipment
•
LCD monitors and TVs
•
POS System
Efficiency
VOUT = 5V
VIN=8V
VIN=15V
Application Circuit Example
VIN
C1
10µF
×2
C3
1µF
PDR
VIN
SW
D1
R3
C2
10µF
×3
R2
5V
L1 10µH
VOUT
100
90
80
70
V IN=12V
Efficiency -- %
60
50
40
30
20
REF
LV5980MC
FB
COMP
R1
SS/HICCUP
47kΩ
C7
C6
C5
GND
C1: GRM31CB31E106K [murata]
C2: C2102JB0J106M [TDK]
L1: FDVE1040-100M [TOKO]
D1: SB3003CH [SANYO]
10
0
0.1 2 3 5 7 1
2 3 5 7 10
2 3 57
100 2 3 5 7
1000 2 3 5 710000
1µF 4.7nF 2.2nF
Load current -- mA
Any and all SANYO Semiconductor Co.,Ltd. products described or contained herein are, with regard to
"standard application", intended for the use as general electronics equipment. The products mentioned herein
shall not be intended for use for any "special application" (medical equipment whose purpose is to sustain life,
aerospace instrument, nuclear control device, burning appliances, transportation machine, traffic signal system,
safety equipment etc.) that shall require extremely high level of reliability and can directly threaten human lives
in case of failure or malfunction of the product or may cause harm to human bodies, nor shall they grant any
guarantee thereof. If you should intend to use our products for new introduction or other application different
from current conditions on the usage of automotive device, communication device, office equipment, industrial
equipment etc. , please consult with us about usage condition (temperature, operation time etc.) prior to the
intended use. If there is no consultation or inquiry before the intended use, our customer shall be solely
responsible for the use.
Specifications of any and all SANYO Semiconductor Co.,Ltd. products described or contained herein stipulate
the performance, characteristics, and functions of the described products in the independent state, and are not
guarantees of the performance, characteristics, and functions of the described products as mounted in the
customer
'
s products or equipment. To verify symptoms and states that cannot be evaluated in an independent
device, the customer should always evaluate and test devices mounted in the customer
'
s products or
equipment.
N2112NKPC 20120801-S00003 No.A2104-1/16
LV5980MC
Specifications
Absolute Maximum Ratings
at Ta = 25°C
Parameter
Input voltage
Allowable pin voltage
Symbol
VIN max
VIN-SW
VIN-PDR
REF
SS/HICCUP
FB
COMP
Allowable power dissipation
Operating temperature
Storage temperature
Pd max
Topr
Tstg
Specified substrate *1
Conditions
Ratings
25
30
6
6
REF
REF
REF
1.35
-40 to +85
-55 to +150
Unit
V
V
V
V
V
V
V
W
°C
°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.
Recommended Operating Conditions
at Ta = 25°C
Parameter
Input voltage range
Symbol
VIN
Conditions
Ratings
4.5 to 23
Unit
V
Electrical Characteristics
at Ta = 25°C, VIN = 15V
Ratings
Parameter
Reference voltage
Internal reference voltage
Pch drive voltage
Saw wave oscillator
Oscillatory frequency
Soft start circuit
Soft start
•
source current
Soft start
•
sink current
UVLO circuit
UVLO release voltage
UVLO lock voltage
Error amplifier
Input bias current
Error amplifier gain
Output sink current
Output source current
Over current limit circuit
Current limit peak
HICCUP timer start-up cycle
HICCUP comparator threshold voltage
HICCUP timer discharge current
PWM comparator
Maximum on-duty
Output
Output on resistance
The entire device
Light load mode consumption current
Thermal shutdown
ISLEEP
TSD
No switching
Design guarantee *2
63
170
83
µA
°C
RON
IO = 0.5A
100
mΩ
DMAX
94
%
ICL
NCYC
VtHIC
IHIC
3.5
4.7
15
0.15
0.25
6.2
A
cycle
V
µA
IEA_IN
GEA
IEA_OSK
IEA_OSC
FB = 1.75V
FB = 0.75V
-100
100
-30
8
-10
220
-17
17
380
-8
30
nA
µA/V
µA
µA
VUVLON
VUVLOF
FB = COMP
FB = COMP
3.3
3.02
3.7
3.42
4.1
3.82
V
V
ISS_SC
ISS_SK
VIN = 3V, SS = 0.4V
1.2
1.8
300
2.4
µA
µA
FOSC
310
370
430
kHz
VREF
VPDR
IOUT = 0 to -5mA
1.210
VIN-5.5
1.235
VIN-5.0
1.260
VIN-4.5
V
V
Symbol
Conditions
min
typ
max
Unit
*2 : Design guarantee: Signifies target value in design. These parameters are not tested in an independent IC.
No.A2104-2/16
LV5980MC
Pin Assignment
TOP VIEW
PDR
GND
SS/HICCUP
COMP
1
2
8
7
SW
VIN
REF
FB
LV5980MC
3
4
6
5
SOIC8
Pin Function Description
Pin No,
1
2
3
4
Pin Name
PDR
GND
SS/HICCUP
COMP
Pch MOSFET gate drive Voltage.
The bypass capacitor is necessarily connected between this pin and VIN.
Ground Pin. Ground pin voltage is reference voltage
Capacitor connection pin for soft start and setting re-startup cycle in HICCUP mode.
About 1.8uA current charges the soft start capacitor.
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
7
REF
VIN
Reference voltage.
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.
Function
No.A2104-4/16
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