Specifications

LV5692P, LV5693P Application Note
http://onsemi.com
23
C12
advantage
disadvantage
smaller value
rapid response
lack of stability
may cause oscillation
greater value
stability increase
slow transient response
worse ripple rejection
・How to set USB output voltage:
USB output voltage calculation formula.
e.g. USB=5V
*
・How to set USB over-current limit value (OCP)
OCP of the USB works when the voltage of RSNS is under “VCC-0.3V”.
The peak current value of OCP is calculated as follows:
“Ipeak (A) ＝0.3/R3” e.g. R3=0.1ohm  Ipeak=3A
(Note) The above values were obtained under typical conditions. The values have tolerance in
manufacturing processes due to external resistor and IC variation.
■Thermal design
Since the controller cannot protect the FET from over-temperature damage, thermal design care must be
carefully done to assure a reliable design.
The temperature of the FET and the dissipated power is defined by the equation.
USB
FB
R
2
R1
1.26V
10
9
12
R
3
VC
C
USBGT
][26.1
][26.1
2
1
VR
R
V
USB 
 
26.1
26.1
1
2


USB
R
R
 
968.2
26.1
26.10.5
1
2



R
R
967.2
1.9
27
1
2




k
k
R
R
VVVUSB 998.426.1967.226.1 
FB -voltage is defined by Vref
Ipeak