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PDF LV5980MD Data sheet ( Hoja de datos )
| Número de pieza | LV5980MD | |
| Descripción | Step-down Switching Regulator | |
| Fabricantes | ON Semiconductor | |
| Logotipo |  |
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Ordering number : ENA2233
LV5980MD
Bi-CMOS IC
Low power consumption and highefficiency
Step-down Switching Regulator
http://onsemi.com
Overview
LV5980MD 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
• ON/OFF Function
• 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
SOIC10
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
Application Circuit Example
VIN
C1
10μF
×2
EN
C3
1μF
R1 VIN
47kΩ
C4 C6 C5
1μF 4.7nF 2.2nF
VIN L1 10μH
VOUT
PDR
SW
D1 R3 C2 5V
EN
REF LV5980MD FB
10μF
×3
R2
COMP
SS/HICCUP
SUBGND GND
C1: GRM31CB31E106K [murata]
C2: C2102JB0J106M [TDK]
L1: FDVE1040-100M [TOKO]
D1: SB3003CH [ON]
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
ORDERING INFORMATION
See detailed ordering and shipping information on page 20 of this data sheet.
Semiconductor Components Industries, LLC, 2013
October, 2013
O3013NK 20131009-S00001 No.A2233-1/20
1 page  
Pin Connections
LV5980MD
Pin Function Description
Pin
Pin Name
Description
1 SW High-side Pch MOSFET drain Pin.
2
PDR
Pch MOSFET gate drive Voltage.
The bypass capacitor is necessarily connected between this pin and Vin.
3
GND
Ground Pin. Ground pin voltage is reference voltage
4
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.
Error Amplifier Output Pin.
The phase compensation network is connected between GND pin and COMP pin.
5
COMP
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)”.
Error amplifier reverse input pin.
6 FB ICs make its voltage keep 1.235V.
Output voltage is divided by external resistances and it across FB.
7
REF
Reference voltage.
8
SUBGND
Short-circuited and use 3pin and 8pin as GND
9 EN ON/OFF Pin.
Supply voltage pin.
10 VIN It is observed by the UVLO function.
When its voltage becomes 3.7V or more, ICs startup in soft start.
No.A2233-5/20
5 Page 
Discontinious current mode
IOUT = 200mA
LV5980MD
Output Voltage
IOUT = 200mA
VSW
5V/DIV
VOUT
20mV/DIV
IL
0.5A/DIV
2μs/DIV
Continious current mode
IOUT = 2A
VSW
5V/DIV
IL
1A/DIV
2μs/DIV
Load Transient response
IOUT = 0.5 Q 2.5A, Slew Rate = 100μS
VOUT
0.2V/DIV
IOUT
2A/DIV
500μs/DIV
Over current protection
OUT - GND short
VOUT
5V/DIV
VSS/HICCUP
5V/DIV
VSW
20V/DIV
IOUT
5A/DIV
20ms/DIV
IL
0.5A/DIV
2μs/DIV
Output Voltage
IOUT = 2A
VOUT
20mV/DIV
IL
1A/DIV
2μs/DIV
Soft start and shutdown
IOUT = 2A
VIN
20V/DIV
VSS/HICCUP
2V/DIV
VOUT
2V/DIV
2ms/DIV
No.A2233-11/20
11 Page | ||
| Páginas | Total 20 Páginas | |
| PDF Descargar | [ Datasheet LV5980MD.PDF ] | |
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