LTC1877 Linear Technology, LTC1877 Datasheet - Page 2

• Manufacturer Part Number: LTC1877
• Description: High Efficiency Monolithic Synchronous Step-Down Regulator
• Manufacturer: Linear Technology

(Note 1)
ELECTRICAL CHARACTERISTICS
ABSOLUTE
LTC1877
Input Supply Voltage (V
I
RUN, V
SYNC/MODE Voltage .................................. – 0.3V to V
SW Voltage ................................... – 0.3V to (V
P-Channel MOSFET Source Current (DC) ........... 800mA
N-Channel MOSFET Sink Current (DC) ............... 800mA
Peak SW Sink and Source Current ........................ 1.5A
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
The
V
SYMBOL
I
V
V
V
I
f
f
I
R
R
2
VFB
Q
OSC
SYNC
PLL LPF
TH
FB
LOADREG
IN
IN
V
V
PFET
NFET
OVL
FB
Extended Commercial (Note 2) ........... – 40 C to 85 C
, PLL LPF Voltage ................................– 0.3V to 2.7V
= 5V unless otherwise specified.
denotes specifications which apply over the full operating temperature range, otherwise specifications are T A = 25 C.
FB
Voltages ...................................... – 0.3V to V
PARAMETER
Feedback Current
Regulated Output Voltage
Output Overvoltage Lockout
Reference Voltage Line Regulation
Output Voltage Load Regulation
Input Voltage Range
Input DC Bias Current
Oscillator Frequency
SYNC Capture Range
Phase Detector Output Current
R
R
DS(ON)
DS(ON)
Pulse Skipping Mode
Burst Mode Operation
Shutdown
Sinking Capability
Sourcing Capability
of P-Channel MOSFET
of N-Channel MOSFET
W
MAXIMUM
IN
).........................– 0.3V to 12V
W W
RATINGS
CONDITIONS
(Note 4)
(Note 4) 0 C T
(Note 4) –40 C T
V
Measured in Servo Loop; V
Measured in Servo Loop; V
(Note 5)
2.65V < V
V
V
V
V
f
f
I
I
PLLIN
PLLIN
SW
SW
IN
SYNC/MODE
RUN
FB
FB
V
OVL
= 2.65V to 10V (Note 4)
= 0.8V
= 0V
= 100mA
= –100mA
U
= 0V, V
< f
> f
= V
IN
OSC
OSC
IN
OVL
+ 0.3V)
< 10V, V
= V
IN
– V
= 10V
IN
A
, I
FB
IN
IN
A
OUT
85 C
SYNC/MODE
85 C
=0A
PACKAGE/ORDER
Consult factory for Military grade parts.
ITH
ITH
= 0.9V to 1.2V
= 1.6V to 1.2V
RUN
GND
= 0V, I
V
I
T
TH
FB
JMAX
8-LEAD PLASTIC MSOP
1
2
3
4
= 125 C,
MS8 PACKAGE
OUT
TOP VIEW
=0A
JA
= 150 C/ W
8
7
6
5
PLL LPF
SYNC/MODE
V
SW
IN
0.784
0.74
2.65
MIN
495
400
20
–3
3
INFORMATION
U
MS8 PART MARKING
– 0.1
0.05
0.65
0.75
TYP
–10
230
550
0.8
0.8
50
10
80
0.1
4
0
10
LTC1877EMS8
ORDER PART
NUMBER
W
LTLU
0.816
MAX
– 0.5
0.84
0.15
0.85
0.95
–20
110
350
605
700
30
10
15
0.5
20
1
UNITS
U
%/V
kHz
kHz
kHz
mV
nA
%
%
V
V
V
A
A
A
A
A