LT1766EGN#TR Linear Technology, LT1766EGN#TR Datasheet - Page 6

• Manufacturer Part Number: LT1766EGN#TR
• Description: IC SW REG STP-DWN 200KHZ 16-SSOP
• Manufacturer: Linear Technology
• Type: Step-Down (Buck)r

Specifications of LT1766EGN#TR

• Internal Switch(s): Yes
• Synchronous Rectifier: No
• Number Of Outputs: 1
• Voltage - Output: 1.2 ~ 54 V
• Current - Output: 1.5A
• Frequency - Switching: 200kHz
• Voltage - Input: 5.5 ~ 60 V
• Operating Temperature: -40°C ~ 125°C
• Mounting Type: Surface Mount
• Package / Case: 16-SSOP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Power - Output: -
• Other names: LT1766EGNTR

LT1766/LT1766-5
TYPICAL PERFORMANCE CHARACTERISTICS
6
2500
2000
1500
1000
2.5
2.0
1.5
1.0
500
2.4
2.0
1.6
1.2
0.8
0.4
0
0
–50
–50
0
Error Amplifi er Transconductance
Switch Peak Current Limit
T
Lockout and Shutdown
Thresholds
A
= 25°C
–25
–25
20
JUNCTION TEMPERATURE (°C)
JUNCTION TEMPERATURE (°C)
GUARANTEED MINIMUM
0
0
DUTY CYCLE (%)
25
25
40
TYPICAL
LOCKOUT
START-UP
SHUTDOWN
50
50
60
75
75
100
100
80
125
125
1766 G01
1766 G07
1766 G04
100
150
150
3000
2500
2000
1500
1000
1.234
1.229
1.214
1.204
1.224
1.219
1.209
500
100
–50
Error Amplifi er Transconductance
FB Pin Voltage and Current
T
40
35
30
25
20
15
10
ERROR AMPLIFIER EQUIVALENT CIRCUIT
A
V
R
5
0
FB 2 • 10
= 25°C
LOAD
0
–25
Shutdown Supply Current
(
V
T
A
SHDN
1k
JUNCTION TEMPERATURE (°C)
= 50Ω
= 25°C
–3
10
0
GAIN
= 0V
)
FREQUENCY (Hz)
25
PHASE
10k
INPUT VOLTAGE (V)
20
CURRENT
50
VOLTAGE
R
200k
OUT
100k
30
75
100 125 150
40
1M
C
12pF
OUT
V
1766 G08
C
1766 G02
50
10M
1766 G05
200
150
100
50
0
–50
0.5
2.0
1.5
1.0
0
60
250
200
150
100
300
250
200
150
100
600
500
400
200
100
300
12
50
6
0
0
–50
0
0
0
Shutdown Supply Current
Frequency Foldback
SHDN Pin Bias Current
T
T
CURRENT REQUIRED TO FORCE SHUTDOWN
(FLOWS OUT OF PIN). AFTER SHUTDOWN,
CURRENT DROPS TO A FEW μA
A
A
= 25°C
= 25°C
–25
AT 2.38V STANDBY THRESHOLD
(CURRENT FLOWS OUT OF PIN)
0.1
JUNCTION TEMPERATURE (°C)
SHUTDOWN VOLTAGE (V)
0
V
IN
0.5
= 60V
25
0.2
V
FB
50
(V)
V
0.3
IN
75
= 15V
1.0
FREQUENCY
SWITCHING
100
CURRENT
0.4
FB PIN
125
1766 G03
1766 G06
1766 G09
1766fc
150
0.5
1.5