LTC1929 LINER [Linear Technology], LTC1929 Datasheet - Page 2

• Manufacturer Part Number: LTC1929
• Description: 2-Phase, High Efficiency, Synchronous Step-Down Switching Regulator
• Manufacturer: LINER [Linear Technology]

ELECTRICAL CHARACTERISTICS
LTC1929
ABSOLUTE AXI U RATI GS
(Note 1)
Input Supply Voltage (V
Topside Driver Voltages (BOOST1,2) .........42V to – 0.3V
Switch Voltage (SW1, 2) .............................36V to – 5 V
SENSE1
SENSE2
EAIN, V
RUN/SS, AMPMD Voltages ..........................7V to – 0.3V
Boosted Driver Voltage (BOOST-SW) ..........7V to – 0.3V
PLLFLTR, PLLIN, V
I
Peak Output Current <1 s(TGL1,2, BG1,2) ................ 3A
INTV
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
temperature range, otherwise specifications are at T
SYMBOL
Main Control Loop
V
V
I
V
V
V
UVLO
g
g
I
I
V
V
I
2
INEAIN
Q
RUN/SS
SCL
TH
EAIN
SENSEMAX
LOADREG
REFLNREG
OVL
m
mOL
RUN/SS
RUN/SSLO
LTC1929C .................................................. 0 C to 85 C
LTC1929I .............................................. – 40 C to 85 C
Voltage ................................................2.7V to – 0.3V
CC
OS
RMS Output Current ................................ 50mA
+
–
, SENSE2
+
Voltages ........................ (1.1)INTV
, V
PARAMETER
Regulated Feedback Voltage
Maximum Current Sense Threshold
Feedback Current
Output Voltage Load Regulation
Reference Voltage Line Regulation
Output Overvoltage Threshold
Undervoltage Lockout
Transconductance Amplifier g
Transconductance Amplifier Gain
Input DC Supply Current
Soft-Start Charge Current
RUN/SS Pin ON Threshold
RUN/SS Pin Latchoff Arming
RUN/SS Discharge Current
OS
Normal Mode
Shutdown
–
, EXTV
W
+
DIFFOUT
, SENSE1
CC
IN
).........................36V to – 0.3V
, INTV
Voltages .... INTV
W W
–
,
CC
,
m
CONDITIONS
(Note 3); I
V
(Note 3)
(Note 3)
Measured in Servo Loop; I
Measured in Servo Loop; I
V
Measured at V
V
I
I
(Note 4)
EXTV
V
V
V
V
Soft Short Condition V
V
U
CC
CC
TH
TH
SENSE
IN
IN
RUN/SS
RUN/SS
RUN/SS
RUN/SS
RUN/SS
A
= 25 C. V
= 1.2V; Sink/Source 5 A; (Note 3)
= 1.2V; (g
= 3.6V to 30V (Note 3)
Ramping Down
to – 0.3V
to – 0.3V
CC
–
Tied to V
= 0V
= 1.9V
Rising
Rising from 3V
= 4.5V
= 5V
The
TH
Voltage = 1.2V
m
EAIN
IN
xZ
denotes the specifications which apply over the full operating
= 15V, V
OUT
L
; No Ext Load); (Note 3)
; V
PACKAGE/ORDER I FOR ATIO
Consult factory for Military grade parts.
EAIN
OUT
SENSE1
SENSE1
SENSE2
SENSE2
PLLFLTR
V
RUN/SS
TH
TH
DIFFOUT
RUN/SS
= 0.5V;
= 5V
PLLIN
SGND
V
V
EAIN
Voltage = 0.7V
Voltage = 2V
OS
OS
NC
I
TH
+
–
–
+
–
+
T
JMAX
28-LEAD PLASTIC SSOP
10
11
12
13
14
= 5V unless otherwise noted.
1
2
3
4
5
6
7
8
9
= 125 C,
G PACKAGE
TOP VIEW
JA
= 95 C/W
28
27
26
25
24
23
22
21
20
19
18
17
16
15
NC
TG1
SW1
BOOST1
V
BG1
EXTV
INTV
PGND
BG2
BOOST2
SW2
TG2
AMPMD
IN
0.792
MIN
0.84
1.0
0.5
65
CC
3
CC
U
0.800
0.002
– 0.1
–1.2
0.05
0.86
TYP
470
3.5
1.5
1.5
4.1
2.0
– 5
75
20
3
ORDER PART
LTC1929CG
LTC1929IG
NUMBER
W
0.808
MAX
– 0.5
0.88
– 50
0.3
1.9
4.0
85
40
4
UNITS
mmho
V/mV
U
%/V
mV
nA
%
%
V
V
V
A
A
A
V
V
A