LTC1982ES6#TRMPBF

LTC1981/LTC1982
1
APPLICATIO S
U
DESCRIPTIO
U
FEATURES
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.
Cellular Telephones
Portable POS Terminal
Handheld Battery Powered Equipment
, LTC and LT are registered trademarks of Linear Technology Corporation.
No External Components Required
Internal Voltage Triplers Produce High Side
Gate Drive for Logic Level FETs
Ultralow Power:
10µA Per Driver ON Current (LTC1982)
20µA ON Current (LTC1981)
<1µA Shutdown Current
V
CC
Range: 1.8V to 5V
Gate Drive Outputs Driven to Ground During
Shutdown
Gate Drive Outputs Internally Clamped to 7.5V Max
“Gate Drive Ready” Output (LTC1981)
Ultrasmall Application Circuit
5-Pin SOT-23 Package (LTC1981)
6-Pin SOT-23 Package (LTC1982)
Single and Dual Micropower
High Side Switch Controllers
in SOT-23
V
CC
GATE
SHDNGNDGDR
LTC1981
LOAD
+
10µF
GATE
DRIVE
READY
SHDN
V
CC
1.8V TO 5.0V
54
123
1981/82 TA01
100k
Q1
Si3442DV
V
CC
GATE 1 GATE 2
SHDN 1 SHDN 2GND
LTC1982
LOAD 1 LOAD 2
+
10µF
SHDN 1
SHDN 2
V
CC
1.8V TO 5.0V
654
123
1981/82 TA02
Q1
1/2 Si6925DQ
Q2
1/2 Si6925DQ
TYPICAL APPLICATIONS
U
Single High Side Switch Controller
Dual High Side Switch Controller
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
LTC1981/LTC1982
3
SUPPLY VOLTAGE, V
CC
(V)
1.5
GATE DRIVE VOLTAGE (V)
5.5
1982 G01
2.5
3.5
4.5
5.0
2.0
3.0
4.0
8.0
7.5
7.0
6.5
6.0
5.5
5.0
4.5
4.0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0
T
A
= 25°C
GATE DRIVE VOLTAGE
(V
GS
COMMON SOURCE)
GATE DRIVE –V
CC
(V
GS
SOURCE FOLLOWER)
SUPPLY VOLTAGE (V)
1.0
0
SUPPLY CURRENT (µA)
5
15
20
25
2.0
3.0
3.5 5.5
1982 G02
10
1.5 2.5
4.0
4.5
5.0
T
A
= 25°C
LTC1981 OR
BOTH CHANNELS ON
LTC1982
EITHER CHANNEL ON
LTC1982
GATE DRIVE VOLTAGE (V)
0
GATE DRIVE CURRENT (µA)
100
10
1
0.1
34 6712 5 8
1982 G03
V
CC
= 3.3V
V
CC
= 2.7V
V
CC
= 1.8V
T
A
= 25°C
V
CC
= 5V
SHDN LOGIC INPUT VOLTAGE (V)
01
SUPPLY CURRENT (µA)
60
50
40
30
20
10
0
1981/82 G04
2
T
A
= 25°C
V
CC
= 3V
SHDN1 TIED
TO SHDN2
SHDN LOGIC INPUT VOLTAGE (V)
01
SUPPLY CURRENT (µA)
300
250
200
150
100
50
0
1981/82 G05
2
T
A
= 25°C
V
CC
= 5V
SHDN1 TIED
TO SHDN2
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
V
OL
GDR Output Voltage Low I
SINK
= 100µA, V
CC
= 1.8V 0.05 0.4 V
GATE Drive Ready Trip Point GATE Voltage Rising
V
CC
= 1.8V 3.85 4.05 4.25 V
V
CC
= 2.7V 5.78 6.08 6.38 V
V
CC
= 3.3V 6.17 6.5 6.82 V
V
CC
= 5V 6.17 6.5 6.82 V
GDR Hysteresis GATE Voltage Falling 2 %
GDR Delay After GATE is Above the GDR Trip Threshold 2 µs
10k Pull-Up to V
CC
Note 1: Absolute Maximum Ratings are those values beyond which the life
of a device may be impaired.
Note 2: All voltage values are with respect to GND.
Note 3: the LTC1982E is guaranteed to meet performance specifications
from 0°C to 70°C. Specifications over the –40°C to 85°C operating
temperature range are assured by design, characterization and correlation
with statistical process controls.
Note 4: Guaranteed by design not subject to test.
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.
(LTC1981 only)
TYPICAL PERFOR A CE CHARACTERISTICS
UW
Supply Current vs Supply Voltage
GATE Drive Voltage vs Supply
Voltage
GATE Drive Current (LTC1982)
I
SUPPLY
I
SUPPLY

LTC1982ES6#TRMPBF

Mfr. #:
Manufacturer:
Analog Devices / Linear Technology
Description:
Gate Drivers Dual Micropower Hi Side Sw Controller
Lifecycle:
New from this manufacturer.
Delivery:
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