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