LTC1879 LINER [Linear Technology], LTC1879 Datasheet - Page 2

• Manufacturer Part Number: LTC1879
• Description: 1.2A Synchronous Step-Down Regulator with 15mA Quiescent Current
• Manufacturer: LINER [Linear Technology]

ABSOLUTE
LTC1879
(Note 1)
Input Supply Voltage ................................ – 0.3V to 11V
I
RUN/SS, V
SYNC/MODE Voltage ................................. – 0.3V to V
(V
V
P-Channel Switch Source Current (DC) .................... 2A
N-Channel Switch Sink Current (DC) ........................ 2A
Peak Switching Sink and Source Current ................. 3A
Operating Ambient Temperature Range
Junction Temperature (Notes 3, 6) ...................... 125 C
Storage Temperature Range ................ – 65 C to 150 C
Lead Temperature (Soldering, 10 sec)................. 300 C
ELECTRICAL CHARACTERISTICS
The
V
SYMBOL
I
V
V
V
I
f
f
I
R
R
I
I
V
I
2
VFB
Q
SYNC
OSC
PLLLPF
PK
LSW
SYNC/MODE
TH
FB
LOADREG
IN
SYNC/MODE
IN
V
V
V
PFET
NFET
SWN
OVL
UVL
FB
PVIN
(Note 2) ............................................. – 40 C to 85 C
, PLL_LPF Voltages ............................. – 0.3V to 2.7V
= 5V unless otherwise noted.
/V
FB
denotes specifications which apply over the full operating temperature range, otherwise specifications are T
Voltage ............................................ – 0.3V to 11V
– V
SWP
PARAMETER
Feedback Current
Regulated Output Voltage
Overvoltage Trip Limit with Respect to V
Undervoltage Trip Limit with Respect to V
Reference Voltage Line Regulation
Output Voltage Load Regulation
Input Voltage Range
Input DC Bias Current
SYNC Capture Range
Oscillator Frequency
Phase Detector Output Current
R
R
Peak Inductor Current
SW Leakage
SYNC/MODE Threshold
SYNC/MODE Leakage Current
FB
DS(ON)
DS(ON)
Pulse Skipping Mode
Burst Mode Operation
Shutdown
Sinking Capability
Sourcing Capability
Voltages ............................... – 0.3V to V
) Voltage ............................. – 0.3V to 11V
of P-Channel FET
of N-Channel FET
W
MAXIMUM
W W
RATINGS
FB
FB
U
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
V
V
PLLIN
PPLIN
SW
SW
IN
SYNC/MODE
RUN
FB
FB
FB
RUN
V
V
OVL
UVL
= 2.65V to 10V (Note 4)
= 0V
= 100mA, V
= – 100mA, V
= 0.7V, Duty Cycle < 35%, V
= 0V, V
= 0V, V
0.7V
< f
> f
= V
= V
OSC
SOC
IN
OVL
FB
IN
IN
< 10V, V
= V
– V
SW
IN
– V
= 10V
IN
IN
UVL
= 0V or 10V, V
A
, I
IN
FB
= 5V
PACKAGE/ORDER
A
OUT
Consult LTC Marketing for parts specified with wider operating temperature ranges.
= 5V
85 C
SYNC/MODE
85 C
RUN/SS
= 0A
PGND1
T
SWP1
SWN1
SGND
PV
JMAX
V
ITH
ITH
I
IN1
TH
FB
= 125 C,
IN
16-LEAD PLASTIC SSOP
= 0.9V to 1.2V
= 1.6V to 1.2V
= 0V, I
1
2
3
4
5
6
7
8
IN
= 10V
= 5V
GN PACKAGE
TOP VIEW
JA
OUT
= 140 C/ W,
= 0A
16
15
14
13
12
11
10
9
JC
PLL_LPF
SYNC/MODE
PGOOD
SV
SWP2
SWN2
PGND2
PV
= 40 C/ W
IN
IN2
0.784
0.740
2.65
MIN
350
495
1.8
0.2
20
20
– 3
3
INFORMATION
U
– 0.1
0.80
0.80
0.05
0.35
0.37
TYP
– 10
270
550
2.2
1.0
0.01
0.01
60
60
15
80
0.1
8
0
10
ORDER PART
LTC1879EGN
A
W
MARKING
= 25 C.
NUMBER
GN PART
1879
0.816
0.840
MAX
0.25
– 0.6
0.45
– 20
110
110
365
750
605
0.5
2.7
1.5
60
10
22
0.6
2.5
1
20
1
UNITS
U
1879f
%/V
kHz
kHz
kHz
mV
mV
nA
%
%
V
V
V
A
A
A
A
A
A
A
V
A