Datasheet

LTC1922-1
2
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
Input Supply
UVLO Undervoltage Lockout Measured on V
CC
10.25 10.7 V
UVHY UVLO Hysteresis Measured on V
CC
3.8 4.2 V
I
CCST
Start-Up Current V
CC
= V
UVLO
– 0.3V ● 145 250 µA
I
CCRN
Operating Current 47 mA
V
SHUNT
Shunt Regulator Voltage Current Into V
CC
= 10mA 10.2 10.8 V
R
SHUNT
Shunt Resistance Current Into V
CC
= 7mA to 17mA –1.5 2 Ω
Delay Blocks
DTHR Delay Pin Threshold SBUS = 1.5V 1.38 1.50 1.62 V
ADLY and PDLY SBUS = 2.25V 2.08 2.25 2.42 V
DHYS Delay Hysteresis Current SBUS = 1.5V, ADLY/PDLY = 1.6V 1.1 1.3 1.45 mA
ADLY and PDLY
DTMO Delay Time-Out SBUS = 1.5V 600 ns
SBUS = 2.25V 900 ns
DZRT Zero Delay Threshold Measured on SBUS 3 4.15 5 V
Phase Modulator
ROS RAMP Offset Voltage Measured on COMP, RAMP = 0V 0.4 V
I
RMP
RAMP Discharge Current RAMP = 1V, COMP = 0V 30 50 mA
I
SLP
Slope Compensation Current Measured on CS, C
T
= 1.5V 35 55 75 µA
C
T
= 3V 70 110 150 µA
DCMX Maximum Phase Shift COMP = 4V ● 95 99.5 %
DCMN Minimum Phase Shift COMP = 0V ● 0.1 0.6 %
V
CC
to GND
Low Impedance Source .........................–0.3V to 10V
(Chip Self Regulates at 10.3V)
All Other Pins to GND
(Low Impedance Source) .....................–0.3V to 5.5V
V
CC
(Current Fed).................................................. 25mA
V
REF
Output Current ................................ Self Regulated
Outputs (A, B, C, D, E, F) Current ..................... ±100mA
Operating Temperature Range (Note 5)
LTC1922E........................................... –40°C to 85°C
LTC1922I............................................ –40°C to 85°C
Storage Temperature Range ................. –65°C to 125°C
Lead Temperature (Soldering, 10 sec).................. 300°C
ORDER PART
NUMBER
T
JMAX
= 125°C, θ
JA
= 110°C/W (G)
T
JMAX
= 125°C,θ
JA
= 62°C/W (N)
LTC1922EG-1
LTC1922IG-1
LTC1922EN-1
LTC1922IN-1
ABSOLUTE AXI U RATI GS
W
WW
U
PACKAGE/ORDER I FOR ATIO
UUW
(Note 1)
ELECTRICAL CHARACTERISTICS
The ● denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at V
CC
= 9.5V, C
T
= 180pF, T
A
= T
MIN
to T
MAX
unless other wise noted.
1
2
3
4
5
6
7
8
9
10
TOP VIEW
G PACKAGE
20-LEAD PLASTIC SSOP
20
19
18
17
16
15
14
13
12
11
SYNC
RAMP
CS
COMP
R
LEB
FB
SS
PDLY
SBUS
ADLY
C
T
GND
OUTA
OUTB
OUTC
V
CC
OUTD
OUTE
OUTF
V
REF
N PACKAGE
20-LEAD PDIP
Consult factory for parts specified with wider operating temperature ranges.