LTC1909-8 LINER [Linear Technology], LTC1909-8 Datasheet - Page 2

• Manufacturer Part Number: LTC1909-8
• Description: Wide Operating Range,No RSENSE TM Step-Down DC/DC Controller with SMBus Programming
• Manufacturer: LINER [Linear Technology]

ELECTRICAL CHARACTERISTICS
ABSOLUTE AXI U RATI GS
over the full operating temperature range, otherwise specifications are T
SYMBOL
Main Control Loop
I
V
I
g
V
I
t
t
t
V
V
LTC1909-8
(Note 1)
Input Supply Voltage
Boosted Topside Driver Supply Voltage
SW, SENSE
EXTV
SEL, SDA, SCL, VRON, PGTMR, V
FB, CPUON, V
FCB, V
I
TG, BG, INTV
TG, BG, INTV
Operating Ambient Temperature Range
Junction Temperature (Note 4) ............................ 125 C
Storage Temperature Range ................. – 65 C to 150 C
Lead Temperature (Soldering, 10 sec).................. 300 C
2
Q
FB
FCB
ON
ON(MIN)
OFF(MIN)
TH
m(EA)
FB
FCB
SENSE(MAX)
SENSE(MIN)
V
V
V
FB(LINEREG)
FB(LOADREG)
FB(OV)
V
BOOST .................................................. – 0.3V to 42V
LTC1909-8EG (Note 2) ....................... – 40 C to 85 C
, V
IN
CC
FB
, I
ON
, (BOOST – SW), RUN/SS, PGOOD, INTV
ON
Voltages...................................... – 0.3V to 2.7V
, V
..................................................– 0.3V to 36V
RNG
+
PARAMETER
Input DC Supply Current
Feedback Reference Voltage
Feedback Voltage Line Regulation
Feedback Voltage Load Regulation
Feedback Input Current
Error Amplifier Transconductance
Forced Continuous Threshold
Forced Continuous Pin Current
On-Time
Minimum On-Time
Minimum Off-Time
Maximum Current Sense Threshold
Minimum Current Sense Threshold
Output Overvoltage Fault Threshold
CC
CC
Voltages ................................. – 5V to 36V
CC
Normal
Shutdown Supply Current
V
V
PGND
PGND
, EXTV
, EXTV
Voltages ....... – 0.3V to (INTV
Voltages .......................... – 0.3V to 7V
W
– V
– V
SENSE
SENSE
CC
CC
Peak Currents .................... 2A
RMS Currents .............. 50mA
+
+
W W
OSENSE
,
U
CC
CONDITIONS
I
V
I
V
I
V
I
I
I
I
V
V
V
V
V
V
TH
TH
TH
ON
ON
ON
ON
IN
FB
FCB
RNG
RNG
RNG
RNG
RNG
RNG
CC
+ 0.3V)
= 1.2V (Note 3)
= 0.5V to 1.9V (Note 3)
= 1.2V (Note 3)
= 4V to 30V, I
= 60 A, V
= 30 A, V
= 180 A, V
= 60 A, V
= 0.8V
,
(Switching Regulator Controller) The
= 0.8V
= 1V, V
= 0V, V
= INTV
= 1V, V
= 0V, V
= INTV
CC
CC
FB
FB
FB
FB
ON
ON
ON
ON
, V
, V
= 0.76V
= 0.76V
= 0.84V
= 0.84V
= 1.5V
= 1.5V
= 1.5V
PACKAGE/ORDER I FOR ATIO
TH
FB
FB
Consult LTC Marketing for parts specified with wider operating temperature ranges.
= 0V
= 0.76V
= 0.84V
= 1.2V (Note 3)
A
= 25 C. V
RUN/SS
PGTMR
PGOOD
SGND
VRON
V
SDA
V
RNG
FCB
SEL
SCL
V
I
I
ON
ON
TH
FB
T
JMAX
28-LEAD PLASTIC SSOP
10
11
12
13
14
1
2
3
4
5
6
7
8
9
IN
= 125 C,
= 15V unless otherwise noted.
G PACKAGE
TOP VIEW
JA
= 95 C/ W
28
27
26
25
24
23
22
21
20
19
18
17
16
15
denotes specifications which apply
BOOST
TG
SW
SENSE
PGND
BG
INTV
V
EXTV
V
GND
FB
V
CPUON
0.792
0.76
MIN
212
425
113
158
IN
CC
OSENSE
1.4
5.5
79
CC
CC
U
+
– 0.05
0.800
0.002
TYP
– 67
– 47
– 93
900
250
500
250
133
186
1.7
0.8
7.5
–5
– 1
15
50
93
LTC1909-8EG
ORDER PART
W
NUMBER
0.808
2000
MAX
– 0.3
0.84
288
575
100
400
153
107
214
9.5
– 2
30
2
50
UNITS
U
19098f
%/V
mS
mV
mV
mV
mV
mV
mV
nA
ns
ns
ns
ns
%
%
A
A
V
V
A