Datasheet

LTC2923
2
2923fa
Supply Voltage (V
CC
) ................................ –0.3V to 10V
Input Voltages
ON ........................................................ –0.3V to 10V
TRACK1, TRACK2 ...................... –0.3V to V
CC
+ 0.3V
RAMP ........................................... –0.3V to V
CC
+ 1V
Output Voltages
FB1, FB2, SDO, STATUS ........................–0.3V to 10V
RAMPBUF ................................. –0.3V to V
CC
+ 0.3V
GATE (Note 2) ................................... –0.3V to 11.5V
(Note 1)
ABSOLUTE AXI U RATI GS
WWWU
PACKAGE/ORDER I FOR ATIO
UU
W
Consult LTC Marketing for parts specified with wider operating temperature ranges.
MS PART
MARKING
LTAED
LTAEE
ORDER PART
NUMBER
T
JMAX
= 125°C, θ
JA
= 120°C/W
1
2
3
4
5
V
CC
ON
TRACK1
TRACK2
RAMPBUF
10
9
8
7
6
RAMP
GATE
FB1
FB2
GND
TOP VIEW
MS PACKAGE
10-LEAD PLASTIC MSOP
Average Current
TRACK1, TRACK2 .............................................. 5mA
FB1, FB2 ............................................................ 5mA
RAMPBUF ......................................................... 5mA
Operating Temperature Range
LTC2923C ............................................... 0°C to 70°C
LTC2923I............................................ –40°C to 85°C
Storage Temperature Range ................ –65°C to 150°C
Lead Temperature (Soldering, 10 sec)
MS Package .................................................... 300°C
DE PART
MARKING
2923
ORDER PART
NUMBER
LTC2923CDE
LTC2923IDE
12
11
10
9
8
7
1
2
3
4
5
6
RAMP
GATE
STATUS
SDO
FB1
FB2
V
CC
ON
TRACK1
TRACK2
RAMPBUF
GND
TOP VIEW
13
DE12 PACKAGE
12-LEAD (4mm × 3mm) PLASTIC DFN
T
JMAX
= 125°C, θ
JA
= 43°C/W
EXPOSED PAD (PIN 13) INTERNALLY CONNECTED TO GND
(PCB CONNECTION OPTIONAL)
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
V
CC
Input Supply Range ● 2.9 5.5 V
I
CC
Input Supply Current I
FBx
= 0, I
TRACKx
= 0 ● 1.3 3 mA
I
FBx
= –1mA, I
TRACKx
= –1mA, ● 5710 mA
I
RAMPBUF
= –2mA
V
CC(UVL)
Input Supply Undervoltage Lockout V
CC
Rising ● 2.2 2.5 2.7 V
∆V
CC(UVLHYST)
Input Supply Undervoltage Lockout Hysteresis 25 mV
∆V
GATE
External N-Channel Gate Drive (V
GATE
– V
CC
)I
GATE
= –1µA ● 5 5.5 6 V
I
GATE
GATE Pin Current Gate On, V
GATE
= 0V, No Faults ● –7 –10 –13 µA
Gate Off, V
GATE
= 5V, No Faults ● 7 10 13 µA
Gate Off, V
GATE
= 5V, ● 5 20 50 mA
Short-Circuit Fault
V
ON(TH)
ON Pin Threshold Voltage V
ON
Rising ● 1.212 1.230 1.248 V
∆V
ON(HYST)
ON Pin Hysteresis ● 30 75 150 mV
The ● denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. 2.9V < V
CC
< 5.5V unless otherwise noted (Note 3).
ELECTRICAL CHARACTERISTICS
LTC2923CMS
LTC2923IMS