lv5781 Sanyo Semiconductor Corporation, lv5781 Datasheet - Page 2

• Manufacturer Part Number: lv5781
• Description: 3a, Point-of-load, Chopper-type Step-down Converter
• Manufacturer: Sanyo Semiconductor Corporation

Specifications
Absolute Maximum Ratings at Ta=25°C
*1: Mounted on a specified board: 114.3mm×76.1mm×1.6mm, glass epoxy.
*2: To ensure that the maximum voltage is not exceeded even for an instant, check that the coil voltage and other surge voltage levels are factored in.
Recommended Operating Conditions at Ta=25°C
Electrical Characteristics at Ta=25°C, V IN =5V (Unless specifically specified)
*These are design guarantee values and no measurements are made.
Maximum input voltage
Maximum CBOOT pin voltage
Maximum SW pin voltage
Maximum voltage between CBOOT and
SW pins
Maximum voltage at FB, SS, and
ENABLE pins
Junction temperature
Allowable power dissipation
Operating temperature range
Storage temperature range
V IN pin voltage
CBOOT pin voltage
SW pin voltage
FB, SS, and ENABLE pin voltage
Output voltage 1
Output voltage 2
Standby mode IC consumption current
Operating time IC consumption current
ENABLE high level voltage
ENABLE low level voltage
Efficiency
Reference voltage
FB pin bias current
On resistance
Soft start current
Oscillation frequency
Maximum on duty ratio
Current limiting value
Under voltage detection
Under voltage detection hysteresis
Thermal shutdown temperature
Thermal shutdown temperature
hysteresis
Parameter
Parameter
Parameter
V IN max
VBT max
VSW max
VBS max
Vfs max
Tj max
Pd max
Topr
Tstg
V IN
VSW
VBT
VFSO
V OUT 1
V OUT 2
I CC 1
I CC 2
VENH
VENL
Effcy
Vref
Iref
Ron
ISS
Fosc
D max
Icl
Vl
Vlh
Ttsd
Dtsd
Symbol
Symbol
Symbol
Mounted on a circuit board *1
FB2 pin selected
Dependent on the external voltage divider
ENABLE=0V
ENABLE=3V
I OUT =1A, V O =3.3V
V IN =4.5V to 6V(±2%)
CBOOT=5V
Design guarantee value*
Design guarantee value*
LV5781
Conditions
Conditions
Conditions
min
0.85
0.76
0.15
145
3.2
4.1
3.3
85
3
3
Ratings
typ
0.185
Ratings
Ratings
180
180
3.3
0.8
6.5
3.7
90
50
80
20
-40 to +125
1
2
-30 to +80
4.5 to 6
0 to 6
0.85
125
max
6.5
6.5
6.5
6.5
13
0.84
0.25
6
6
No.A0663-2/7
200
225
3.4
0.7
4.2
10
13
5
Unit
Unit
°C
°C
°C
W
V
V
V
V
V
V
V
V
V
Unit
kHz
mΩ
mA
µA
nA
µA
°C
°C
%
%
V
V
V
V
V
A
V
V