LTC3785-1 Linear Technology, LTC3785-1 Datasheet - Page 2

• Manufacturer Part Number: LTC3785-1
• Description: Buck-Boost Controller
• Manufacturer: Linear Technology

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ABSOLUTE MAXIMUM RATINGS
LTC3785-1
(Note 1)
Input Supply Voltage (V
I
SW1, SW2, I
RUN/SS, MODE, CCM, V
PGOOD Voltage ............................................ –0.3V to 6V
TG1, V
TG2, V
BG1, BG2 Voltage ........................................ –0.3V to 6V
Peak Driver Output Current < 10μs
(TG1, TG2, BG1, BG2) .................................................3A
V
Operating Temperature Range.................. –40°C to 85°C
Storage Temperature Range ................... –65°C to 125°C
ORDER INFORMATION
LEAD FREE FINISH
LTC3785EUF-1#PBF
Consult LTC Marketing for parts specifi ed with wider operating temperature ranges.
Consult LTC Marketing for information on non-standard lead based fi nish parts.
For more information on lead free part marking, go to:
For more information on tape and reel specifi cations, go to:
ELECTRICAL CHARACTERISTICS
PARAMETER
V
Input Operating Voltage
Quiescent Current—Burst Mode Operation
Quiescent Current—Shutdown
Quiescent Current—Active
Error Amp
Feedback Voltage
Feedback Input Current
Error Amp Source Current
Error Amp Sink Current
Error Amp A
V
V
V
2
temperature range, otherwise specifi cations are at T
SVOUT
IN
CC
CC
CC
CC
DC ............................................................. –1V to 11V
Pulsed, <1μs ............................................. –2V to 12V
With Respect to SW1 ............................... –0.3V to 6V
With Respect to SW2 ............................... –0.3V to 6V
Supply
Regulator
Maximum Regulating Voltage
Regulation Voltage
Average Output Current .................................100mA
, I
BST1
BST2
SVIN
VOL
Voltages ................................... –0.3V to 16V
Voltages ................................... –0.3V to 16V
SSW1
.............................................. –0.3V to 11V
, I
SSW2
TAPE AND REEL
LTC3785EUF-1#TRPBF
DRV
IN
Voltage:
) ......................... –0.3V to 11V
, V
CC
Voltages ...... –0.3V to 6V
http://www.linear.com/leadfree/
CONDITIONS
V
RUN/SS = 0V, V
MODE = 0V (Note 4)
(Note 5)
(Note 5)
V
V
C
IN
IN
PART MARKING
37851
= 0V, MODE = 3.6V (Note 4)
= 5V, I
= 3.6V, I
http://www.linear.com/tapeandreel/
A
= 25°C. V
VCC
VCC
The
= –20mA
OUT
= –20mA
l
IN
= 0V
denotes the specifi cations which apply over the full operating
= V
OUT
PIN CONFIGURATION
= V
PACKAGE DESCRIPTION
24-Lead (4mm × 4mm) Plastic QFN
DRV
= V
EXPOSED PAD (PIN 25) IS GND, MUST BE SOLDERED TO PCB
RUN/SS
V
BST1
SENSE
I
CCM
LSET
T
V
FB
JMAX
C
24-LEAD (4mm 4mm) PLASTIC QFN
= V
1
2
3
4
5
6
= 125°C, θ
BST2
24 23 22 21 20 19
7
l
l
l
l
= 3.6V, R
8
UF PACKAGE
JA
TOP VIEW
= 37°C/W 4 LAYER BOARD
9
1.200
25
MIN
4.15
2.7
3.3
10 11 12
T
= 49.9k, R
1.225
–500
4.35
TYP
900
3.5
86
15
0.8
90
TEMPERATURE RANGE
–40°C to 85°C
1
18
17
16
15
14
13
I
BG1
V
BG2
I
SW2
SSW1
SSW2
DRV
ILSET
MAX
1.25
4.55
200
500
1.5
3.6
10
25
= 59k.
UNITS
37851f
mA
μA
μA
nA
μA
μA
dB
V
V
V
V