LTC1773 LINER [Linear Technology], LTC1773 Datasheet - Page 2

• Manufacturer Part Number: LTC1773
• Description: Synchronous Step-Down DC/DC Controller
• Manufacturer: LINER [Linear Technology]

ABSOLUTE AXI U RATI GS
LTC1773
(Note 1)
Input Supply Voltage .............................. –0.3V to 10.0V
I
RUN/SS, V
SYNC/FCB Voltage ...................................... –0.3V to V
BG, TG Voltages...........................................–0.3V to V
SW Voltage ...................................................– 5V to 11V
Operating Ambient Temperature Range
Junction Temperature (Note 3) ............................. 125°C
Storage Temperature Range ..................–65°C to 150°C
Lead Temperature (Soldering, 10 sec.)................. 300°C
ELECTRICAL CHARACTERISTICS
temperature range, T
SYMBOL
I
V
∆V
∆V
V
I
V
I
V
I
f
V
∆
TG t
TG t
BG t
BG t
2
VFB
S
RUN/SS
SYNC/FCB
OSC
TH
FB
LOADREG
RUN/SS
SYNC/FCB
UVLO
VSENSE(MAX
OVL
FB
(Note 2) ...............................................–40°C to 85°C
r
f
r
f
Voltage ................................................ –0.3V to 2.5V
)
FB,
SENSE
PARAMETER
Feedback Current
Regulated Feedback Voltage
∆Output Overvoltage Lockout
Reference Voltage Line Regulation
Output Voltage Load Regulation
Input DC Bias Current
Normal Mode
Burst Mode Operation
Shutdown
Shutdown
RUN/SS Threshold
Soft-Start Current Source
Auxiliary Feedback Threshold
SYNC/FCB Pull-Up Current
Oscillator Frequency
Undervoltage Lockout
Top Gate Drive Rise Time
Top Gate Drive Fall Time
Bottom Gate Drive Rise Time
Bottom Gate Drive Fall Time
W
A
= 25
–
Voltages .................. –0.3V to V
°
C. V
W W
IN
= 5V unless otherwise specified.
U
CONDITIONS
(Note 4)
(Note 4)
∆V
V
I
I
(Note 5)
V
V
V
V
V
V
V
V
V
V
V
Maximum Current Sense Voltage
C
C
C
C
TH
TH
IN
IN
ITH
RUN/SS
RUN/SS
RUN/SS
SYNC/FCB
SYNC/FCB
FB
FB
IN
IN
LOAD
LOAD
LOAD
LOAD
OVL
at 1.0V (Note 4)
at 0.6V (Note 4)
= 5V, V
Ramping Up from 0V
= 2.7V to 8.5V (Note 4)
= 0V
Ramping Down from 3V
= 0.8V
= 0V, V
The
= 3000pF (Note 6)
= 3000pF (Note 6)
= 3000pF (Note 6)
= 3000pF (Note 6)
= V
= 0V, 2.7V < V
= 0V, V
= 0V
●
OVL
Ramping Negative
= 0V
IN
IN
IN
ITH
IN
denotes specifications which apply over the full operating
– V
= OPEN, V
= 5V, V
IN
FB
PACKAGE/ORDER I FOR ATIO
< 2.4V
Consult LTC Marketing for parts specified with wider operating temperature ranges.
Order Options Tape and Reel: Add #TR
Lead Free: Add #PBF Lead Free Tape and Reel: Add #TRPBF
Lead Free Part Marking:
SYNC/FCB
SYNC/MODE
RUN/SS
IN
SYNC/MODE
GND
< 8.5V
V
I
TH
FB
T
JMAX
10-LEAD PLASTIC MSOP
1
2
3
4
5
= OPEN
= 125°C, θ
MS PACKAGE
= OPEN
TOP VIEW
JA
= 120°C/W
http://www.linear.com/leadfree/
●
●
●
●
10
9
8
7
6
SW
SENSE
V
TG
BG
IN
0.788
0.75
0.76
2.35
MIN
500
0.4
0.1
40
85
–
U
MS PART MARKING
0.002
0.80
–0.2
2.65
TYP
400
550
100
0.2
0.7
1.5
0.8
0.4
2.5
20
60
80
10
55
45
48
80
45
2
ORDER PART
LTC1773EMS
NUMBER
LTMV
W
0.812
MAX
0.02
–0.8
0.84
2.65
600
600
115
160
150
180
150
0.8
1.0
2.5
1.0
2.8
60
80
30
5
UNITS
1773fb
U
%/V
kHz
kHz
mV
mV
nA
µA
µA
µA
µA
µA
µA
ns
ns
ns
ns
%
%
V
V
V
V
V