LTC1707 LINER [Linear Technology], LTC1707 Datasheet - Page 2

• Manufacturer Part Number: LTC1707
• Description: High Efficiency Monolithic Synchronous Step-Down Switching Regulator
• Manufacturer: LINER [Linear Technology]

ABSOLUTE AXI U RATI GS
Note 1: Absolute Maximum Ratings are those values beyond which the life
of a device may be impaired.
Note 2: T
dissipation P
LTC1707
(Note 1)
Input Supply Voltage ................................ – 0.3V to 10V
I
RUN/SS, V
SYNC/MODE Voltage ................................. – 0.3V to V
P-Channel Switch Source Current (DC) .............. 800mA
N-Channel Switch Sink Current (DC) .................. 800mA
Peak SW Sink and Source Current ......................... 1.5A
Operating Ambient Temperature Range
Junction Temperature (Note 2) ............................. 125 C
Storage Temperature Range ................ – 65 C to 150 C
Lead Temperature (Soldering, 10 sec)................. 300 C
ELECTRICAL CHARACTERISTICS
temperature range, otherwise specifications are at T
SYMBOL
I
V
V
I
V
I
I
f
V
R
R
I
I
V
2
VFB
RUN/SS
SYNC/MODE
OSC
PK
LSW
S
TH
FB
LOADREG
RUN/SS
UVLO
REF
V
V
PFET
NFET
V
OVL
FB
REF
T
Commercial ............................................ 0 C to 70 C
Industrial ........................................... – 40 C to 85 C
Voltage ................................................. – 0.3V to 5V
J
= T
J
A
is calculated from the ambient temperature T
+ (P
D
PARAMETER
Feedback Current
Regulated Feedback Voltage
Output Overvoltage Lockout
Reference Voltage Line Regulation
Output Voltage Load Regulation
Input DC Bias Current
Run/SS Threshold
Soft-Start Current Source
SYNC/MODE Pull-Up Current
Oscillator Frequency
Undervoltage Lockout
R
R
Peak Inductor Current
SW Leakage
Reference Output Voltage
Reference Output Load Regulation
FB
according to the following formula:
D
DS(ON)
DS(ON)
• 110 C/W)
Pulse Skipping Mode
Burst Mode Operation
Shutdown
Shutdown
Voltages ............................... – 0.3V to V
of P-Channel FET
of N-Channel FET
W
W W
CONDITIONS
(Note 3)
(Note 3)
V
I
I
(Note 4)
V
V
V
V
V
V
V
V
V
V
V
V
V
I
I
V
V
I
0V I
A
TH
TH
SW
SW
REF
IN
IN
ITH
RUN/SS
RUN/SS
RUN/SS
RUN/SS
SYNC/MODE
FB
FB
IN
IN
IN
IN
IN
RUN/SS
V
and power
OVL
U
Sinking 2 A (Note 3)
Sourcing 2 A (Note 3)
Ramping Up from 0V (0 C to 70 C)
Ramping Up from 0V (–40 C to 85 C)
= 3V to 8.5V (Note 3)
= 8.5V, V
Ramping Down from 3V (0 C to 70 C)
Ramping Down from 3V (–40 C to 85 C)
= 4V, I
= 0.7V
= 0V
= –100mA
= – 100mA
= 0 A
= 0V, V
A
REF
= V
= 25 C. V
Ramping Positive
= 0V
= 0V
= 0V, 3V < V
= 0V, V
OVL
TH
The
100 A
IN
= 0V
OUT
= 1.4V, Duty Cycle < 40%
– V
= 8.5V, V
IN
IN
IN
= 3.3V, V
FB
IN
< 3V
denotes specifications which apply over the full operating
= 5V unless otherwise specified.
IN
< 8.5V
SYNC/MODE
PACKAGE/ORDER I FOR ATIO
Consult factory for Military grade parts.
Note 3: The LTC1707 is tested in a feedback loop that servos V
balance point for the error amplifier (V
Note 4: Dynamic supply current is higher due to the gate charge being
delivered at the switching frequency.
SYNC/MODE
RUN/SS
GND
V
I
TH
FB
T
JMAX
= Open
1
2
3
4
8-LEAD PLASTIC SO
= 0V
= 125 C,
S8 PACKAGE
TOP VIEW
JA
= 110 C/ W
8
7
6
5
V
SYNC/MODE
V
SW
REF
IN
ITH
1.178
0.78
2.55
2.60
2.45
2.50
0.70
MIN
315
0.4
1.2
0.5
20
U
= 0.8V).
S8 PART MARKING
0.002
0.915
– 0.5
0.80
2.25
2.70
2.80
2.70
2.80
1.19
TYP
300
200
350
0.7
1.5
0.5
0.6
2.3
60
11
35
0.5
6
6
10
ORDER PART
LTC1707CS8
LTC1707IS8
W
NUMBER
1707
1707I
1.202
MAX
0.82
0.01
– 0.8
2.85
3.00
2.85
3.00
1.10
110
320
385
1000
1.0
3.3
2.5
0.7
0.8
60
35
15
0.8
FB
to the
UNITS
U
%/V
kHz
kHz
mV
mV
mV
nA
nA
%
%
V
A
A
A
A
V
A
A
V
V
V
V
A