NR111D Datasheet, PDF (3/14 Pages) Sanken electric – Light Load High Efficiency

Light Load High Efficiency,31V, Current Mode Step-Down 4A Switcing Regulator IC
NR111D
Oct./17/2013
Electrical Characteristics
Ta = 25°C
Parameter
Reference voltage
Output voltage temperature
coefficient
Switching frequency
Symbol
V_REF
⊿V_REF/⊿T
MIN
0.784
―
Ratings
TYP
0.800
±0.05
f_SW
280 350
Line regulation
(8)
V_Line
―
50
Load regulation
(8)
V_Load
―
50
Overcurrent protection
threshold
I_S1
―
1.5
I_S2
―
5.5
Supply Current
I_IN
―
1
Shutdown Supply Current
I_IN(off)
0
1
SS Pin
Source current
at low level
voltage
I_EN/SS
6
10
EN Pin
Sink current
Threshold voltage
I_EN
V_C/EH
20
0.7
1.4
ISET Pin
Open voltage
V_ISET
1.5
Max on-duty
(8)
D_MAX
―
90
Minimum on-time
(8)
T_ON(MIN)
―
150
Thermal shutdown threshold
temperature
(8)
TSD
151
165
Thermal shutdown
restart hysteresis
(8) _{TSD_hys}
―
20
of temperature
(8) _{Guaranteed by design,not tested.}
The input and output condition is limited by Minimum on-time.
MAX
0.816
―
420
―
―
―
―
―
―
14
50
2.1
―
―
―
―
Units
Test conditions
V V_IN = 12V，I_O = 1.0A
mV/°C ^{VIN = 12V, IO = 1.0A}
40°C to +85°C
kHz
V_IN=12V, V_O=5.0V,
I_O=1A
mV ^{VIN=8V～31V, VO =5.0V,}
I_O=1A
mV
V_IN=12V, V_O=5.0V,
IO=0.1A～2.0A
V_IN =12V, V_O =5.0V
A
ISET=OPEN
V_IN =12V, V_O =5.0V
ISET=SHORT
mA
V_IN = 12V
V_EN=10kΩ pull up to V_IN
μA
V_IN =12V, I_O =0A,
V_EN=0V
μA V_SS=0V, V_IN =12V
μA V_EN= 10V
V V_IN =12V
V V_IN =12V
%
nsec
°C
°C
Rev.1.1
SANKEN ELECTRIC CO., LTD.
3
http://www.sanken-ele.co.jp