lt1976 Linear Technology Corporation, lt1976 Datasheet - Page 27

• Manufacturer Part Number: lt1976
• Description: High Voltage 1.5a, 200khz Step-down Switching Regulator With 100?a Quiescent Current
• Manufacturer: Linear Technology Corporation

PACKAGE DESCRIPTIO
TYPICAL APPLICATIO
3.3V TO 60V
4700pF
8.06k
V
IN
14V to 3.3V Non Burst Mode Step-Down Converter
1μF
4.7μF
100V
CER
100pF
6.60 ±0.10
NOTE:
1. CONTROLLING DIMENSION: MILLIMETERS
2. DIMENSIONS ARE IN
3. DRAWING NOT TO SCALE
(.0035 – .0079)
V
SHDN
V
C
SYNC
GND
IN
C
T
0.09 – 0.20
LT1976B
4.50 ±0.10
RECOMMENDED SOLDER PAD LAYOUT
BOOST
V
PGFB
BIAS
C
SW
PG
SS
FB
Information furnished by Linear Technology Corporation is believed to be accurate and reliable.
However, no responsibility is assumed for its use. Linear Technology Corporation makes no represen-
tation that the interconnection of its circuits as described herein will not infringe on existing patent rights.
0.1μF
(.169 – .177)
SEE NOTE 4
4.30 – 4.50*
U
(.020 – .030)
0.50 – 0.75
(.141)
MILLIMETERS
3.58
0.65 BSC
0.33μF
(INCHES)
U
10MQ60N
0.45 ±0.05
33μH
(.116)
16-Lead Plastic TSSOP (4.4mm)
(Reference LTC DWG # 05-08-1663)
2.94
1.05 ±0.10
4148
Exposed Pad Variation BC
0.25
16.5k
1%
10k
1%
REF
*DIMENSIONS DO NOT INCLUDE MOLD FLASH. MOLD FLASH
4. RECOMMENDED MINIMUM PCB METAL SIZE
SHALL NOT EXCEED 0.150mm (.006") PER SIDE
FOR EXPOSED PAD ATTACHMENT
0° – 8°
FE Package
1976 TA03
100μF
6.3V
TANT
V
3.3V
1A
OUT
(.0256)
0.65
BSC
16 1514 13 12 11
1
(.0077 – .0118)
100
0.195 – 0.30
50
25
75
2
0
0.1
LT1976B Efficiency and Power
Loss vs Load Current
TYP
(.193 – .201)
3 4 5 6 7 8
4.90 – 5.10*
(.141)
3.58
1
LOAD CURRENT (mA)
10
EFFICIENCY
5V
10
LT1976/LT1976B
9
(.002 – .006)
0.05 – 0.15
3.3V
FE16 (BC) TSSOP 0204
(.116)
(.0433)
2.94
MAX
100
1.10
TYPICAL
POWER LOSS
(.252)
6.40
BSC
1000
1976 G25
10000
10
0.1
0.01
0.001
1
27
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