Electrical Characteristics - Linear Technology LTC1736 Datasheet

LTC1736
ABSOLUTE AXI U RATI GS
(Note 1)
Input Supply Voltage (V
IN
Topside Driver Supply Voltage (BOOST)....42V to – 0.3V
Switch Voltage (SW) ....................................36V to – 5V
EXTV , VIDV , (BOOST – SW) Voltages ..7V to – 0.3V
CC CC
+ –
SENSE , SENSE .......................... 1.1(INTV
FCB Voltage ............................(INTV
I , V , V Voltage .........................2.7V to – 0.3V
TH OSENSE FB
RUN/SS, VID0 to VID4, PGOOD Voltages ....7V to – 0.3V
Peak Driver Output Current <10µs (TG, BG) .............. 3A
INTV Output Current ......................................... 50mA
CC
Operating Ambient Temperature Range
LTC1736C ............................................... 0°C to 85°C
LTC1736I ............................................ – 40°C to 85°C
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 PARAMETER
Main Control Loop
V Output Voltage Set Accuracy
OSENSE
∆V
Reference Voltage Line Regulation
LINEREG
∆V
Output Voltage Load Regulation
LOADREG
g Transconductance Amplifier g
m
V Forced Continuous Threshold
FCB
I Forced Continuous Current
FCB
V Feedback Overvoltage Lockout
OVL
I Input DC Supply Current
Q
Normal Mode
Shutdown
V Run Pin Start Threshold
RUN/SS
V Run Pin Begin Latchoff Threshold
RUN/SS
I Soft-Start Charge Current
RUN/SS
I RUN/SS Discharge Current
SCL
UVLO Undervoltage Lockout
∆V
Maximum Current Sense Threshold
SENSE(MAX)
I SENSE Pins Total Source Current
SENSE
t Minimum On-Time
ON(MIN)
TG Transition Time:
TG t Rise Time
r
TG t Fall Time
f
2
).........................36V to – 0.3V
) to – 0.3V
CC
+ 0.3V) to – 0.3V
CC
= 25°C. V
A
CONDITIONS
(Note 3) See Table 1
V = 3.6V to 30V (Note 3)
IN
(Note 3)
Measured in Servo Loop; V
Measured in Servo Loop; V
m
V = 0.85V
FCB
(Note 4)
V
RUN/SS
V
RUN/SS
V
RUN/SS
V
RUN/SS
Soft Short Condition, V
V
RUN/SS
Measured at V
V = 0.7V
FB
V
SENSE
Tested with a Square Wave (Note 8)
(Note 9)
C
LOAD
C
LOAD
PACKAGE/ORDER I FOR ATIO
TOP VIEW
1
C
OSC
2
RUN/SS
3
I
TH
4
FCB
5
SGND
6
PGOOD
–
7
SENSE
+
8
SENSE
9
V
FB
10
V
OSENSE
11
VID0
12
VID1
G PACKAGE
24-LEAD PLASTIC SSOP
= 125°C, θ
T
JMAX
Consult factory for Military grade parts.
The denotes specifications which apply over the full operating
= 15V, V = 5V unless otherwise noted.
IN RUN/SS
= 0.7V
ITH
= 2V
ITH
= 0V
, Ramping Positive
, Ramping Positive
= 0V
= 0.5V,
FB
= 4.5V
Pin (V Ramping Down)
IN IN
– +
= V = 0.8V
SENSE
= 3300pF
= 3300pF
U W
ORDER PART
NUMBER
24 TG
23 BOOST
LTC1736CG
22 SW
LTC1736IG
21 V
IN
20 INTV
CC
19 BG
PGND
18
EXTV
17
CC
VIDV
16
CC
VID4
15
VID3
14
VID2
13
= 110°C/W
JA
MIN TYP
0.001
0.1
– 0.1
1.3
0.76 0.8
– 0.17
0.84 0.86
450
15
1.0 1.5
4.1
– 0.7 – 1.2
0.5 2
3.5
60 75
60
160
50
50
U
MAX UNITS
1 %
0.02 %/V
0.3 %
– 0.3 %
mmho
0.84 V
µA
– 0.3
0.88 V
µA
µA
25
1.9 V
4.5 V
µA
µA
4
3.9 V
85 mV
µA
80
200 ns
90 ns
90 ns