BL2940
1A Low-Dropout Regulator BL2940
DESCRIPTION
The B L2 940 po sitive volta ge regu la tor fea tu re s th e a b ility to
sou rc e 1A of ou tpu t cu rren t with a dropou t vo ltag e of t yp ic a ll y
0.5V and a ma x imu m o f 1V o ver the en tire te mpe ra ture ran ge .
Fu rth ermo re , a q u iesce nt cu rren t redu c tion c ircu it h as be en
in clude d wh ic h red uc es the groun d c urre n t wh en th e d iffe ren tia l
be tween the inp ut vo lta ge and the ou tp ut vo lta ge exc eed s
app rox ima te l y 3V. Th e qu ie sc en t cu rren t with 1A o f ou tpu t
curre n t a nd an inpu t-ou tpu t d ifferen tia l of 5V is the re fo re o nl y 3 0
mA . H igh er qu iescen t c urren ts on ly ex ist whe n the re gu la to r is in
th e d ro pou t mo de (V
I N
− V
O U T
≤
3V ). Desig ne d a lso fo r veh icu la r
app lic ations, th e B L2 9 40 a nd a ll reg ula ted c ircu itry a re p ro te cted
fro m re ve rse ba tte ry in sta lla tion s or 2 -ba tte ry ju mp s. D urin g line
tran sien ts, such a s lo ad du mp wh en the inpu t v olta ge ca n
mo men ta rily ex cee d th e spec ifie d max imu m o pera ting vo lta ge,
th e reg u la to r will a uto ma tic all y shu t do wn to pro tec t bo th the interna l c ircu its an d th e lo ad.
The B L2 940 ca nno t be harme d b y te mp orar y mirror-ima ge in se rtion. Fa milia r re gu la to r
fea tures such a s sho rt c ircu it and the rma l o ve rlo ad protec tio n a re a lso p ro vid ed .
TO -263
TO -22 0
TO -25 2
SOT223
FEATURES
Dropo ut vo ltage typ ic a lly 0.5V @ I
O
= 1A
Outpu t cu rren t in exc ess o f 1A
Outpu t vo lta ge trimme d be fo re a sse mb ly
Re ve rse b a tte ry protec tion
In te rn al sho rt c irc u it c urren t limit
Mirro r imag e in se rtion pro tec tion
P + P roduc t En han ce me nt tested
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BL2940
ABSOLUTE MAXIMUM RATINGS
(Ta =25℃)
Charac te ristic
Surg e S upp l y voltage (t≤ 100 ms)
Inp ut Vo ltag e
In te rn al po wer d issip ation
Max imu m jun c tion te mpera tu re
Sto ra ge te mpe ra tu re ra nge
ESD su sc ep tib ilit y
（
HBM）
*1
Limit
60
26
In te rn all y Li mited
150
-65 ~ +15 0
2
℃
℃
kV
Unit
V
V
ELECTRICAL CHARACTERISTICS
(V
I N
=V
O
+5V, I
O
=1A, C
O
=22µ F, T
A
= 25℃ un le ss o th erwise sp ec ifie d. )
Charac te ristic
Outpu t vo lta ge
Lin e reg u la tion
Lo ad re gu la tio n
Outpu t imped anc e
Cond ition s
5 mA≤I
O
≤1A
V
O
+2V≤V
I N
≤26V
I
O
=5 mA
50 mA
≤I
O
≤1A
100 mADC and
20 mA rms,
f
O
=12 0Hz
V
O
+2V≤V
I N
≤26V
I
O
=5 mA
V
I N
=V
O
+5V
I
O
= 1A
10Hz -100 kHz,
I
O
=5 mA
f
O
=12 0Hz,1V rms
I
O
=10 0 mA
f
O
=1kHz ,1Vrms
I
O
=5 mA
5V
Min .
4.85
T yp.
5.00
20
35
35
10
30
150
60
60
20
I
O
=1A
I
O
=10 0 mA
1.6
R
O
=10 0
T≤ 100 ms
R
O
=10 0
R
O
=10 0
T≤ 100 ms
60
0.5
110
1.9
75
-30
-75
-15
-50
0.8
150
1.6
60
72
54
54
32
0.5
110
1.9
75
-30
-75
-15
-50
0.8
150
mV/
1000Hr
V
MAX
mV
MAX
A
V
V
V
15
45
Max
5.15
50
50
Min .
7.76
6.25V
≤V
I N
≤26V
8V
T yp.
8.00
20
55
55
10
30
240
66
dB
15
45
Max
8.24
80
80
9.4V≤V
I N
≤2
6V
Unit
V
mV
mV
m
mA
mA
µVrms
Quie sc en t cu rren t
Outpu t no ise
voltage
Ripp le re je c tion
Lo ng term
stab ility
Dropo ut vo ltage
Short c ircu it
curre n t
Max imu m line
tran sien t
Re ve rse p o la rit y
DC in pu t vo ltage
Re ve rse p o la rit y
tran sien t inpu t
voltage
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