LTC3541
3541fa
Supply Voltages:
V
IN
, LV
IN
..................................................0.3V to 6V
LV
IN
V
IN
..........................................................<0.3V
Pin Voltages:
ENVLDO, ENBUCK, MODE, SW,
LFB, BUCKFB .............................0.3V to (V
IN
+ 0.3V)
Linear Regulator I
OUT(MAX)
(100ms) (Note 9) ......100mA
Operating Ambient Temperature Range
(Note 2) ....................................................40癈 to 85癈
Junction Temperature (Note 5) .............................125癈
Storage Temperature Range ...................65癈 to 125癈
(Note 1)
The ?/SPAN> denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25癈. V
IN
= 3.6V unless otherwise specified (Note 2)
LECTRICAL CHARACTERISTICS
BSOLUTE AXI U RATI GS W
W
U
ACKAGE/ORDER I FOR ATIO
U
W
TOP VIEW
11
DD PAcKAGE
1 -LEAD mm?mm PLA TI DFN
10
9
6
7
8
4
5
3
2
1
SW
ENVLDO
MODE
GND
LV
IN
V
IN
NBUcK
UcKFB
LFB
LV
OUT
T
JMAX
= 125癈, ?/DIV>
JA
= 43癈/W
EXPOSED PAD (PIN 11) IS GND, MUST BE SOLDERED TO PCB
ORDER PART NUMBER DD PART MARKING
LTC3541EDD
LCBS
Order Options Tape and Reel: Add #TR
Lead Free: Add #PBF Lead Free Tape and Reel: Add #TRPBF
Lead Free Part Marking: http://www.linear.com/leadfree/
Consult LTC Marketing for parts specified with wider operating temperature ranges.
SYMBOL PARAMETER
CONDITIONS
MIN TYP MAX UNITS
I
PK
Peak Inductor Current
V
IN
= 4.2V (Note 8)
0.8 0.95 1.25
A
I
BUCKFB
BUCKFB Pin Input Current
V
BUCKFB
= 0.9V
?/DIV>
?0 nA
I
LFB
LFB Pin Input Current
V
LFB
= 0.45V
?/DIV>
200 40
nA
V
IN
Input Voltage Range
(Note 4)
?SPAN class="pst LTC3541EDD-TRPBF_2465890_11"> 2.7
5.5
V
V
IN(LINEREG)
Buck V
IN
Line Regulation
V
IN
= 2.7V to 5.5V, ENBUCK = V
IN
,
ENVLDO = 0V, MODE = V
IN
(Note 6)
?/DIV>
0.04 0.4 %/V
VLDO V
IN
Line Regulation
(Referred to LFB)
V
IN
= 2.7V to 5.5V, LV
OUT
= 1.2V, ENBUCK = V
IN
,
ENVLDO = V
IN
, I
OUT(VLDO)
= 100mA, LV
IN
= 1.5V
0.6
mV/V
Linear Regulator V
IN
Line
Regulation (Referred to LFB)
V
IN
= 2.7V to 5.5V, LV
OUT
= 1.2V, ENBUCK = 0V,
ENVLDO = V
IN
, I
OUT(LREG)
= 10mA
0.6
mV/V
LV
IN(LINEREG)
LV
IN
Line Regulation
(Referred to LFB)
LV
IN
= 0.9V to 5.5V, V
IN
= 5.5V, LV
OUT
= 0.4V,
ENBUCK = V
IN
, ENVLDO = V
IN
, MODE = V
IN
,
I
OUT(VLDO)
= 100mA
0.3
mV/V
VLDO
DO
LV
IN
LV
OUT
Dropout Voltage
(Note 9)
LV
IN
= 1.5V, ENBUCK = V
IN
, ENVLDO = V
IN
,
MODE = V
IN
, I
OUT(VLDO)
= 50mA, V
LFB
= 0.3V
28 60 mV
V
LOADREG
Buck Output Load Regulation ENBUCK = V
IN
, ENVLDO = 0V, MODE = V
IN
(Note 6)
0.5
%
VLDO Output Load Regulation I
OUT(VLDO)
= 1mA 300mA, LV
IN
= 1.5V, LV
OUT
= 1.2V,
ENBUCK = V
IN
, ENVLDO = V
IN
, MODE = V
IN
?/DIV>
0.25 0.5
%
Linear Regulator Output Load I
OUT(LREG)
= 1mA 30mA, LV
OUT
= 1.2V,
ENBUCK = 0V, ENVLDO = V
IN
?/DIV>
0.25 0.5
%
V
BUCKFB
Reference Regulation Voltage
(Note 6)
ENBUCK = V
IN
, ENVLDO = 0V, T
A
= 25癈
0.784 0.8 0.816 V
ENBUCK = V
IN
, ENVLDO = 0V, 0癈 d T
A
d 85癈
0.782 0.8 0.818 V
ENBUCK = V
IN
, ENVLDO = 0V, 40癈 d T
A
d 85癈 ?/SPAN> 0.78 0.8 0.82
V
V
LFB
Reference Regulation Voltage
(Note 7)
ENBUCK = 0V, ENVLDO = V
IN
, T
A
= 25癈
0.392 0.4 0.408 V
ENBUCK = 0V, ENVLDO = V
IN
, 0癈 d T
A
d 85癈
0.391 0.4 0.409 V
ENBUCK = 0V, ENVLDO = V
IN
, 40癈 d T
A
d 85癈
?/DIV>
0.390 0.4 0.410 V
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