IMP IMP37-33JST, IMP37-33JCM, IMP37-30JST, IMP37-25JST, IMP37-30JCM Datasheet
...
©
1999 IMP, Inc. 408-432-9100/www.impweb.com 1
Key Features
Applications
◆ High-efficiency linear power supplies
◆ Post regulator for switching supplies
◆ 5V to 3.3V linear regulators
◆ USB hubs
◆ Battery chargers
◆ Routers, ISDN/DSL modems
◆
Low Dropout Voltage
– 0.8V maximum at 100mA
– 0.95V maximum at 800mA
– 20% lower dropout voltage than “1117”
LDO regulators
◆
Guaranteed Low Dropout Voltage at Multiple
Current Levels
◆
1% Trimmed 2.5V, 3.0V and 3.3V Outputs
◆
Reduced Quiescent Current: 75µA Maximum
◆
Short Circuit and Thermal Protection
◆
Space Saving SOT-223 Surface Mount Package
◆
“1117” Pin Compatible
Block Diagram
IMP3
IMP377
POWER MANAGEMENT
Lo
Lo
w Dr
w Dr
opout P
opout P
ositiv
ositive e
VVolt
oltagag
e R
e R
egulat
egulatororss
– 800mA
– 800mA
– 2.5V
– 2.5V
, 3.0V and 3.3V Output
, 3.0V and 3.3V Output
The IMP37 series of Low Dropout (LDO) three-terminal voltage regulators feature guaranteed low dropout voltages at currents up to 0.8A. The
IMP37 regulator family dropout voltage is guaranteed to be 0.95V or
lower at 0.8A. At 100mA, the maximum dropout voltage is 0.8V.
Compared with “1117” type LDOs, the IMP37 has a 20% lower dropout
voltage.
Three fixed output voltages are offered: 2.5V, 3.0V and 3.3V. Output voltages are factory trimmed to within 1% of the nominal value.
In addition to low dropout voltages, the IMP37 family features greatly
reduced quiescent operating current. The 75µA maximum specification
represents an over 100 times improvement over competitive devices.
Devices are short circuit protected, and a thermal protection circuit shuts
the regulator off should the junction temperature exceed 165°C.
The IMP37 is available in low-profile plastic SOT-223 and TO-263
packages and are pin compatible with fixed “1117” devices.
R
Input
3
CS
Current
Limit
2
Out
(Tab)
IMP37
Error
+
–
Thermal
Protection
Amp
–
+
+
Ref
–
1
GND
37_01.eps
2
408-432-9100/www.impweb.com
©
1999 IMP, Inc.
Pin Configuration
IMP3
IMP377
Pin Descriptions
Package Marking Code
Ordering Information
IMP37
37_05.eps
GND
INPUT
1
3
OUT
TAB IS V
OUT
2
SOT-223 TO-263
Front View Front View
rebmuNtraPegakcaP
eciveD
gnikraM
TSJ52-73PMI322-TOS5273
TSJ03-73PMI322-TOS0373
TSJ33-73PMI322-TOS3373
MCJ52-73PMI362-OTMCJ5273
MCJ03-73PMI362-OTMCJ0373
MCJ33-73PMI362-OTMCJ3373
spe.50elbaT_73
snoitpOtuptuOrebmuNgniredrOtraP
egatloV
mumixaM
tnerruCtnecseiuQ
taegatloVtuoporD
Am008
322-TOS
egakcaP
362-OT
egakcaP
V5.257µAV59.0TSJ52-73PMIMCJ52-73PMI
V0.357µAV59.0TSJ03-73PMIMCJ03-73PMI
V3.357µAV59.0TSJ33-73PMIMCJ33-73PMI
spe.60t_73
Note: Tape and reel shipping is available for the SOT-223 and TO-263 packages. Append the TAPE AND REEL designation “/T” to the ordering
part number for tape and reel devices. For example, the IMP37-25JST/T is a 2.5V SOT-223 packaged device shipped in reels.
rebmuNniPemaNnoitcnuF
1DNGniPdnuorG
2TUOegatloVtuptuO
3TUPNIegatloVtupnI
BATBATegatloVtuptuO
spe.30elbaT_73
INPUT
3
TAB IS V
OUT
IMP37
OUT2
GND
1
37_04.eps
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