LT1947EMS#TRPBF Linear Technology, LT1947EMS#TRPBF Datasheet - Page 3

• Manufacturer Part Number: LT1947EMS#TRPBF
• Description: IC SW REG TFT-LCD TRPL ADJ10MSOP
• Manufacturer: Linear Technology

Specifications of LT1947EMS#TRPBF

• Applications: Converter, TFT, LCD
• Voltage - Input: 2.7 ~ 8 V
• Number Of Outputs: 3
• Voltage - Output: Adjustable up to 30V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 10-MSOP, Micro10™, 10-uMAX, 10-uSOP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

ELECTRICAL CHARACTERISTICS
SYMBOL
Error Amplifier Voltage Gain
C
C
FB1 Voltage to Begin C
SW1 Current Limit
SW2 Current Limit
SW1 Saturation Voltage
SW2 Saturation Voltage
SW1 Maximum Duty Cycle
SW2 Maximum Duty Cycle
Oscillator Frequency
V
SW1 Leakage Current
SW2 Leakage Current
SHDN Pin Bias Current
SHDN Pin High
SHDN Pin Low
Note 1: Absolute Maximum Ratings are those values beyond which the life
of a device may be impaired.
Note 2: The LT1947 is guaranteed to meet performance specifications
from 0°C to 70°C. Specifications over the – 40°C to 85°C operating
TYPICAL PERFOR A CE CHARACTERISTICS
temperature range, otherwise specifications are at T
T
T
ON
Current Source
Threshold to Turn On Q3
Switch Drop
85
80
75
70
65
60
55
50
45
35
40
0
3.3V TFT-LCD Converter Efficiency
25
AV
50
DD
LOAD CURRENT (mA)
75
T
Charge
V
IN
100 125
= 3V
V
IN
= 3.3V
150 175 200
W
V
IN
= 2.7V
CONDITIONS
EA1 and EA2
V
(Note 3)
(Note 3)
I
I
I
Switch Off, SW1 = 3.3V
Switch Off, SW2 = 3.3V
V
Active Mode
Shutdown Mode
1947 G01
SW1
SW2
Q3
U
FB1
SHDN
= 7mA
= 1.3V
= 800mA
= 300mA
= 2.4V
12
10
8
6
4
–50
A
Supply Current
= 25°C. V
SHDN = 2.4V
–25
The
TEMPERATURE (°C)
●
IN
0
denotes the specifications which apply over the full operating
= 3.3V, V
25
temperature range are assured by design, characterization and correlation
with statistical process controls.
Note 3: Switch current limit guaranteed by design and/or correlation to
static tests.
50
SHDN
= 3.3V unless otherwise specified.
75
1947 G02
100
–10
–2
–4
–6
–8
●
–50
C
T
Current Source
1.25
1.17
0.35
MIN
1.1
2.3
2.4
82
4
–25
TEMPERATURE (°C)
0
0.230
1.28
0.01
0.01
TYP
100
160
5.5
1.2
1.4
0.6
0.3
85
10
3
25
LT1947
0.280
MAX
1.30
1.23
0.36
200
6.5
3.5
0.4
50
25
2
1
5
5
75
1947 G03
UNITS
1947fa
3
MHz
V/V
mV
100
µA
µA
µA
µA
%
%
V
V
A
A
V
V
V
V