NR885E Datasheet, PDF (3/12 Pages) Sanken electric – Synchronous Buck Regulator

3A, 18V, 350kHz , Synchronous Buck Regulator
NR885E
Oct./30/2013
Electrical Characteristics
Parameter
Reference voltage
Output voltage temperature
coefficient
Switching frequency
Symbol
V_REF
⊿V_REF/⊿T
MIN
0.784
―
f_SW
280
Line regulation
(8)
V_Line
―
Load regulation
Over current protection
threshold
Supply Current
(8)
V_Load
―
I_S
3.1
I_IN
―
Shutdown Supply Current
I_IN(off)
0
SS Pin
Source current
at low level
voltage
High level
voltage
I_EN/SS
6
V_SSH
―
EN Pin
Sink current
Threshold voltage
I_EN
V_C/EH
0.7
Max on-duty
(8)
D_MAX
―
Minimum on-time
(8)
(9)
T_ON(MIN)
―
Thermal shutdown threshold
temperature
(8)
TSD
151
Thermal shutdown
restart hysteresis
(8) _{TSD_hys}
―
of temperature
(8) _{Guaranteed by design, not tested.}
(9) _{The I/O characteristic are limited by the TON(MIN).}
Ratings
TYP
0.800
±0.05
350
50
50
―
6
―
MAX
0.816
―
420
―
―
6.0
―
10
Ta = 25°C
Units
Test conditions
V V_IN = 12V，I_O = 1.0A
mV/°C
V_IN = 12V, I_O = 1.0A
40°C to +85°C
kHz
V_IN =12V, V_O=3.3V,
I_O =1A
mV ^{VIN = 6.3V～18V,}
V_O = 3.3V, I_O = 1A
mV
V_IN = 12V, V_O = 3.3V,
I_O = 0.1A～3.0A
A V_IN = 12V, V_O = 3.3V
mA
V_IN = 12V
V_EN=10kΩ pull up to V_IN
μA
V_IN =12V, I_O =0A,
V_EN=0V
10
14
μA V_SS=0V, V_IN=12V
3.0
―
V V_IN =12V
50
100
μA V_EN= 10V
1.4
2.1
V V_IN =12V
90
―
%
150
―
nsec
165
―
°C
20
―
°C
Rev.1.1
SANKEN ELECTRIC CO., LTD.
3
http://www.sanken-ele.co.jp