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LTC1624CS8 数据表(PDF) 4 Page - Linear Technology

部件名 LTC1624CS8
功能描述  High Efficiency SO-8 N-Channel Switching Regulator Controller
PDF  28 Pages
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制造商  LINER [Linear Technology]
网页  http://www.linear.com
标志 LINER - Linear Technology

LTC1624CS8 数据表(HTML) 4 Page - Linear Technology

  LTC1624CS8 Datasheet HTML 1Page - Linear Technology LTC1624CS8 Datasheet HTML 2Page - Linear Technology LTC1624CS8 Datasheet HTML 3Page - Linear Technology LTC1624CS8 Datasheet HTML 4Page - Linear Technology LTC1624CS8 Datasheet HTML 5Page - Linear Technology LTC1624CS8 Datasheet HTML 6Page - Linear Technology LTC1624CS8 Datasheet HTML 7Page - Linear Technology LTC1624CS8 Datasheet HTML 8Page - Linear Technology LTC1624CS8 Datasheet HTML 9Page - Linear Technology Next Button
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LTC1624
TYPICAL PERFORMANCE CHARACTERISTICS
1.2
0.8
2.4
0
0IOUT(MAX)
IOUT
(a)
1624 G01
IOUT(MAX)
SHUTDOWN
ACTIVE
MODE
VITH vs Output Current
TEMPERATURE (
°C)
–40
300
250
200
150
100
50
0
5
4
3
2
1
0
35
85
1624 G14
–15
10
60
110
135
ITH/RUN = 1V
ITH/RUN = 0V
ITH/RUN Pin Source Current vs
Temperature
IITH vs VITH
200
150
50
0
3
VITH (V)
1.2
2.4
0.8
0
(b)
1624 G02
SHUTDOWN
ACTIVE
MODE
Frequency vs Feedback Voltage
FEEDBACK VOLTAGE
0
250
200
150
100
50
0
1.00
1624 G03
0.25
0.50
0.75
1.25
TEMPERATURE (
°C)
–40
170
168
166
164
162
160
158
156
154
152
150
10
60
85
1448 G13
–15
35
110
135
Maximum Current Sense
Threshold vs Temperature
TEMPERATURE (
°C)
–40
250
200
150
100
50
0
10
60
85
1448 G12
–15
35
110
135
VOUT IN REGULATION
VFB = 0V
PIN FUNCTIONS
SENSE – (Pin 1): Connects to the (–) input for the current
comparator. Built-in offsets between the SENSE – and VIN
pins in conjunction with RSENSE set the current trip thresh-
olds. Do not pull this pin more than 15V below VIN or more
than 0.3V below ground.
ITH/RUN (Pin 2): Combination of Error Amplifier Compen-
sation Point and Run Control Inputs. The current com-
parator threshold increases with this control voltage.
Nominal voltage range for this pin is 1.19V to 2.4V. Forcing
this pin below 0.8V causes the device to be shut down. In
shutdown all functions are disabled and TG pin is held low.
VFB (Pin 3): Receives the feedback voltage from an exter-
nal resistive divider across the output.
GND (Pin 4): Ground. Connect to the (–) terminal of COUT,
the Schottky diode and the (–) terminal of CIN.
SW (Pin 5): Switch Node Connection to Inductor. In step-
down applications the voltage swing at this pin is from a
Schottky diode (external) voltage drop below ground to
VIN.
Operating Frequency vs
Temperature



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