(Notes 2, 3) .............................................. –40°C to 125°C
Storage Temperature Range .................. –65°C to 150°C
pin conFiguraTion
TOP VIEW
CAP_SLCT1
CAP_SLCT0
VOUTM5
31 VOUTSP
30 VOUTSN
29 INTV
CC
28 DRV
CC
27 BGATE
39
PGND
26 BST
25 TGATE
24 SW
23 VCC2P5
22 ICAP
21 VCAP
20 OUTFET
13 14 15 16 17 18 19
CAP1
CAP2
CAP3
CAP4
CFP
CFN
VCAPP5
INFET
PFO
38 37 36 35 34 33 32
SCL 1
SDA 2
SMBALERT
3
CAPGD 4
VC 5
CAPFB 6
OUTFB 7
SGND 8
RT 9
GPI 10
ITST 11
CAPRTN 12
UHF PACKAGE
38-LEAD (5mm
×
7mm) PLASTIC QFN
T
JMAX
= 125°C,
θ
JA
= 34°C/W
EXPOSED PAD (PIN 39) IS PGND, MUST BE SOLDERED TO PCB
orDer inForMaTion
LEAD FREE FINISH
LTC3350EUHF#PBF
LTC3350IUHF#PBF
TAPE AND REEL
LTC3350EUHF#TRPBF
LTC3350IUHF#TRPBF
PART MARKING*
3350
3350
PACKAGE DESCRIPTION
38-Lead (5mm
×
7mm) Plastic QFN
38-Lead (5mm
×
7mm) Plastic QFN
TEMPERATURE RANGE
–40°C to 125°C
–40°C to 125°C
Consult LTC Marketing for parts specified with wider operating temperature ranges. *The temperature grade is identified by a label on the shipping container.
Consult LTC Marketing for information on nonstandard lead based finish parts.
For more information on lead free part marking, go to:
http://www.linear.com/leadfree/
For more information on tape and reel specifications, go to:
http://www.linear.com/tapeandreel/
V
IN
PFI
3350fc
For more information
www.linear.com/LTC3350
3
LTC3350
The
l
denotes the specifications which apply over the specified operating
junction temperature range, otherwise specifications are at T
A
= 25°C (Note 2). V
IN
= V
OUT
= 12V, V
DRVCC
= V
INTVCC
unless otherwise
noted.
SYMBOL
V
IN
I
Q
V
CAPFBHI
V
CAPFBLO
I
CAPFB
V
OUTFB
V
OUTFB(TH)
I
OUTFB
V
OUTBST
V
UVLO
V
DRVUVLO
V
DUVLO
V
OVLO
V
VCAPP5
V
SNSI
PARAMETER
Input Supply Voltage
Input Quiescent Current (Note 4)
Maximum Regulated V
CAP
Feedback Voltage
Minimum Regulated V
CAP
Feedback Voltage
CAPFB Input Leakage Current
Regulated V
OUT
Feedback Voltage
l
elecTrical characTerisTics
Switching Regulator
CONDITIONS
l
MIN
4.5
TYP
MAX
35
UNITS
V
mA
V
V
V
nA
V
V
V
nA
V
V
V
V
V
mV
mV
V
V
V
4
V
CAPDAC
Full Scale (1111b)
l
1.188
1.176
0.628
–50
1.188
1.176
1.27
–50
4.5
3.85
3.75
145
55
37.7
36.3
1.200
1.200
0.638
1.200
1.200
1.3
1.212
1.224
0.647
50
1.212
1.224
1.33
50
35
V
CAPDAC
Zero Scale (0000b)
V
CAPFB
= 1.2V
l
OUTFET Turn-Off Threshold
OUTFB Input Leakage Current
V
OUT
Voltage in Step-Up Mode
INTV
CC
Undervoltage Lockout
DRV
CC
Undervoltage Lockout
V
IN
– V
CAP
Differential Undervoltage Lockout
V
IN
Overvoltage Lockout
Charge Pump Output Voltage
Regulated Input Current Sense Voltage
(VOUTSP – VOUTSN)
Regulated Charge Current Sense Voltage
(ICAP – VCAP)
Common Mode Range (ICAP, VCAP)
Peak Inductor Current Sense Voltage
Reverse Inductor Current Sense Voltage
ICAP Pin Current
Falling Threshold
V
OUTFB
= 1.2V
V
IN
= 0V
Rising Threshold
Falling Threshold
Rising Threshold
Falling Threshold
Rising Threshold
Falling Threshold
Rising Threshold
Falling Threshold
Relative to V
CAP
, 0V ≤ V
CAP
≤ 20V
l
l
l
l
l
l
l
l
l
l
4.3
4
4.2
3.9
185
90
38.6
37.2
5
4.45
4.35
225
125
39.5
38.1
Input Current Sense Amplifier
l
31.36
31.04
31.36
31.04
0
51
3.867
32.00
32.00
32.00
32.00
58
7
30
135
1
64
64
400
32.64
32.96
32.64
32.96
20
65
10
mV
mV
mV
mV
V
mV
mV
µA
µA
mmho
μmho
μmho
μmho
Charge Current Sense Amplifier
V
SNSC
V
CMC
V
PEAK
V
REV
I
ICAP
V
CAP
= 10V
l
l
Step-Down Mode
Step-Down Mode, V
SNSC
= 32mV
Step-Up Mode, V
SNSC
= 32mV
l
Error Amplifier
g
MV
g
MC
g
MI
g
MO
Oscillator
f
SW
Switching Frequency
Maximum Programmable Frequency
Minimum Programmable Frequency
R
T
= 107k
l
V
CAP
Voltage Loop Transconductance
Charge Current Loop Transconductance
Input Current Loop Transconductance
V
OUT
Voltage Loop Transconductance
495
490
500
500
1
200
505
510
kHz
kHz
MHz
kHz
R
T
= 53.6k
R
T
= 267k
4
3350fc
For more information
www.linear.com/LTC3350
LTC3350
The
l
denotes the specifications which apply over the specified operating
junction temperature range, otherwise specifications are at T
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Embedded System
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