LTC1982 반도체 회로 부품 판매점
(LTC1981 / LTC1982) Single and Dual Micropower High Side Switch Controllers
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 Linear Technology |
www.DataSheet4U.com
LTC1981/LTC1982
Single and Dual Micropower
High Side Switch Controllers
in SOT-23
FEATURES
s No External Components Required
s Internal Voltage Triplers Produce High Side
Gate Drive for Logic Level FETs
s Ultralow Power:
10µA Per Driver ON Current (LTC1982)
20µA ON Current (LTC1981)
<1µA Shutdown Current
s VCC Range: 1.8V to 5V
s Gate Drive Outputs Driven to Ground During
Shutdown
s Gate Drive Outputs Internally Clamped to 7.5V Max
s “Gate Drive Ready” Output (LTC1981)
s Ultrasmall Application Circuit
s 5-Pin SOT-23 Package (LTC1981)
s 6-Pin SOT-23 Package (LTC1982)
U
APPLICATIO S
s Cellular Telephones
s Portable POS Terminal
s Handheld Battery Powered Equipment
DESCRIPTIO
The LTC®1981/LTC1982 are low-power, self-contained
N-channel MOSFET drivers. An internal voltage tripler
allows gates to be driven without the use of any external
components. Internal regulation circuitry allows quies-
cent current to drop to 10µA per driver (20µA for LTC1981)
once the gates are charged.
Low quiescent current and low shutdown current (under
1µA) make these parts ideal for battery and other power
constrained systems. The wide input voltage range ac-
commodates a variety of battery/input configurations.
Gate drive is internally clamped to 7.5V providing protec-
tion to the external MOSFET gate. The MOSFETs can be
driven in either high side or low side mode.
The LTC1981 single driver version also includes a gate
drive ready pin and twice the drive current capacity of the
dual driver LTC1982.
The LTC1981 is available in a 5-pin SOT-23. The LTC1982
is available in a 6-pin SOT-23.
, LTC and LT are registered trademarks of Linear Technology Corporation.
TYPICAL APPLICATIONS
Single High Side Switch Controller
VCC
1.8V TO 5.0V
+
10µF
Q1
Si3442DV
100k
GATE
DRIVE
READY
SHDN
54
VCC GATE
LTC1981
GDR GND SHDN
123
LOAD
1981/82 TA01
VCC
1.8V TO 5.0V
+
10µF
SHDN 1
SHDN 2
Dual High Side Switch Controller
654
VCC GATE 1 GATE 2
LTC1982
SHDN 1 GND SHDN 2
123
Q1
1/2 Si6925DQ
Q2
1/2 Si6925DQ
LOAD 1
LOAD 2
1981/82 TA02
1
LTC1981/LTC1982
ABSOLUTE AXIwww.DataSheet4U.com U RATI GS (Notes 1, 2)
Terminal Voltage
LTC1981: VCC, GATE, SHDN, GDR ........ –0.3V to 7.5V
LTC1982: VCC, GATE 1, GATE 2,
SHDN 1, SHDN 2 ................... –0.3V to 7.5V
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
UW U
PACKAGE/ORDER I FOR ATIO
TOP VIEW
GDR 1
GND 2
SHDN 3
5 VCC
4 GATE
S5 PACKAGE
5-LEAD PLASTIC SOT-23
TJMAX = 150°C, θJA = 250°C/W
ORDER PART
NUMBER
LTC1981ES5
S5 PART
MARKING
LTSF
Consult factory for parts specified with wider operating temperature ranges.
TOP VIEW
SHDN 1 1
GND 2
SHDN 2 3
6 VCC
5 GATE 1
4 GATE 2
S6 PACKAGE
6-LEAD PLASTIC SOT-23
TJMAX = 150°C, θJA = 230°C/W
ORDER PART
NUMBER
LTC1982ES6
S6 PART
MARKING
LTPF
ELECTRICAL CHARACTERISTICS The q 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
VCC Operating Supply Voltage
ICC Supply Current
GATE 1 and GATE 2 Outputs High
GATE 1 or GATE 2 Outputs High
GATE Output High (LTC1981)
q 1.8
5.5
q 17 30
q 10 20
q 17 30
V
µA
µA
µA
ISHDN
SHDN Supply Current
SHDN 1 and SHDN 2 Inputs Low
SHDN Input Low (LTC1981)
q 1 µA
q 1 µA
VGATE
GATE Drive Output Voltage
VCC = 1.8V
VCC = 2.7V
VCC = 3.3V
VCC = 5V
q 4.27 4.50 4.75
q 6.40 6.75 7.10
q 6.90 7.25 7.50
q 6.90 7.25 7.50
fOSC Charge Pump Oscillator Frequency Measured with 10k Resistor from Output to GND
600
tON Turn-on Time into 1000pF
From SHDN 1, SHDN 2 Going High to
GATE 1, GATE 2 = VCC + 1V
110
From SHDN Going High to GATE = VCC +1V (LTC1981)
85
tOFF Turn-off Time into 1000pF
From SHDN 1, SHDN 2 Going Low to
GATE 1, GATE 2, GATE = 100mV
12
VIL SHDN Input Low Voltage
VCC = 1.8V to 5.5V
q 0.4
VIH SHDN Input High Voltage
VCC = 1.8V to 5.5V
q 1.6
CIN SHDN Input Capacitance
(Note 4)
5
IIN SHDN Input Leakage Current
±1
V
V
V
V
kHz
µs
µs
µs
V
V
pF
µA
2
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제조업체: Linear Technology
( linear )
LTC1982 controller
데이터시트 다운로드 :
[ LTC1982.PDF ]
[ LTC1982 다른 제조사 검색 ]
국내 전력반도체 판매점
상호 : 아이지 인터내셔날
전화번호 : 051-319-2877
[ 홈페이지 ]
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전력반도체 문의 : 010-3582-2743
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