Datasheet
2
LTC1923
1923f
V
DD
to GND................................................. –0.3V to 6V
SDSYNC, R
SLEW
......................................... –0.3V to 6V
FB, CNTRL, V
THRM
, I
LIM
, V
SET
..................... –0.3V to 6V
CS
+
, CS
–
, TEC
+
, TEC
–
.................................–0.3V to 6V
ORDER PART
NUMBER
LTC1923EGN
T
JMAX
= 125°C, θ
JA
= 120°C/W
ABSOLUTE AXI U RATI GS
WWWU
PACKAGE/ORDER I FOR ATIO
UU
W
The ● denotes specifications which apply over the full operating temperature range, otherwise specifications are T
A
= 25°C.
V
DD
= 5V, R
SLEW
= V
DD
, SDSYNC = V
DD
, R
T
= 10k, C
T
= 330pF unless otherwise noted.
ELECTRICAL CHARACTERISTICS
1
2
3
4
5
6
7
8
9
10
11
12
13
14
TOP VIEW
GN PACKAGE
28-LEAD PLASTIC SSOP
28
27
26
25
24
23
22
21
20
19
18
17
16
15
PLLLPF
R
SLEW
SDSYNC
CNTRL
EAOUT
FB
AGND
SS
I
LIM
V
SET
FAULT
V
THRM
H/C
V
TEC
R
T
C
T
V
REF
PDRVB
NDRVB
V
DD
PGND
NDRVA
PDRVA
CS
+
CS
–
I
TEC
TEC
+
TEC
–
Consult LTC Marketing for parts specified with wider operating temperature ranges.
(Note 1)
FAULT, H/C ................................................. –0.3V to 6V
Operating Temperature Range (Note 2) .. –40°C to 85°C
Storage Temperature Range ................. –65°C to 125°C
Lead Temperature (Soldering, 10 sec)..................300°C
ORDER PART
NUMBER
LTC1923EUH
32 31 30 29 28 27 26 25
9 10 11 12 13 14 15 16
17
18
19
20
21
22
23
24
8
7
6
5
4
3
2
1CNTRL
EAOUT
FB
AGND
NC
SS
I
LIM
V
SET
PDRVB
NDRVB
V
DD
V
DD
PGND
NDRVA
PDRVA
CS
+
SDSYNC
R
SLEW
PLLLPF
R
T
C
T
V
REF
NC
NC
FAULT
V
THRM
H/C
V
TEC
TEC
–
TEC
+
I
TEC
CS
–
UH PACKAGE
32-LEAD PLASTIC QFN
PIN 1
TOP VIEW
T
JMAX
= 125°C, θ
JA
= 34°C/W
EXPOSED PAD IS PGND
(MUST BE SOLDERED TO PCB)
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
Input Supply
VDD Operating Supply Voltage ● 2.7 5.5 V
UVLO Undervoltage Lockout Low to High Threshold ● 2.6 2.7 V
UVHYST Hysteresis High to Low ● 50 130 mV
I
DD
Operating Supply Current No Output Load, Outputs Not Switching 2 4 mA
I
DDSHDN
Shutdown I
DD
SDSYNC = 0V 10 25 µA
SHDNTH Shutdown Threshold Measured at PDRVA, PDRVB 0.3 0.8 1.4 V