LTC1981/LTC1982
2
Terminal Voltage
LTC1981: V
CC
, GATE, SHDN, GDR ........ –0.3V to 7.5V
LTC1982: V
CC
, GATE 1, GATE 2,
SHDN 1, SHDN 2 ................... –0.3V to 7.5V
ABSOLUTE AXI U RATI GS
W
WW
U
(Notes 1, 2)
ELECTRICAL CHARACTERISTICS
The ● denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. V
CC
= 5V unless otherwise specified. C
GATE 1
= C
GATE 2
= C
GATE
= 1000pF.
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
V
CC
Operating Supply Voltage ● 1.8 5.5 V
I
CC
Supply Current GATE 1 and GATE 2 Outputs High ● 17 30 µA
GATE 1 or GATE 2 Outputs High
● 10 20 µA
GATE Output High (LTC1981)
● 17 30 µA
I
SHDN
SHDN Supply Current SHDN 1 and SHDN 2 Inputs Low ● 1 µA
SHDN Input Low (LTC1981)
● 1 µA
V
GATE
GATE Drive Output Voltage V
CC
= 1.8V ● 4.27 4.50 4.75 V
V
CC
= 2.7V ● 6.40 6.75 7.10 V
V
CC
= 3.3V ● 6.90 7.25 7.50 V
V
CC
= 5V ● 6.90 7.25 7.50 V
f
OSC
Charge Pump Oscillator Frequency Measured with 10k Resistor from Output to GND 600 kHz
t
ON
Turn-on Time into 1000pF From SHDN 1, SHDN 2 Going High to
GATE 1, GATE 2 = V
CC
+ 1V 110 µs
From SHDN Going High to GATE = V
CC
+1V (LTC1981) 85 µs
t
OFF
Turn-off Time into 1000pF From SHDN 1, SHDN 2 Going Low to
GATE 1, GATE 2
,
GATE = 100mV 12 µs
V
IL
SHDN Input Low Voltage V
CC
= 1.8V to 5.5V ● 0.4 V
V
IH
SHDN Input High Voltage V
CC
= 1.8V to 5.5V ● 1.6 V
C
IN
SHDN Input Capacitance (Note 4) 5 pF
I
IN
SHDN Input Leakage Current ±1 µA
ORDER PART
NUMBER
S6 PART
MARKING
T
JMAX
= 150°C, θ
JA
= 230°C/W
Consult factory for parts specified with wider operating temperature ranges.
LTPF
LTC1982ES6
PACKAGE/ORDER I FOR ATIO
UUW
Operating Temperature Range
LTC1981E/LTC1982E (Note 3) ............ –40°C to 85°C
Storage Temperature Range ................. –65°C to 150°C
Lead Temperature (Soldering, 10 sec)..................300°C
ORDER PART
NUMBER
S5 PART
MARKING
T
JMAX
= 150°C, θ
JA
= 250°C/W
LTSF
LTC1981ES5
4 GATE
5 V
CC
SHDN 3
GDR 1
TOP VIEW
S5 PACKAGE
5-LEAD PLASTIC SOT-23
GND 2
SHDN 1 1
GND 2
SHDN 2 3
6 V
CC
5 GATE 1
4 GATE 2
TOP VIEW
S6 PACKAGE
6-LEAD PLASTIC SOT-23
