GMT G901T24U, G901T24T, G901T24D, G901T24B, G901T21U Datasheet
...
Ver: 1.0
Mar 22, 2002
TEL: 886-3-5788833
http://www.gmt.com.tw
1
G901
Global Mixed-mode Technology Inc.
3.3V 300mA Low Dropout Regulator
Features
Dropout voltage typically 0.45V @ IO = 300mA
Output current in excess of 300mA
Output voltage accuracy +3%
Quiescent current, typically 0.6mA
Internal short circuit current limit
Internal over temperature protection
Applications
CD-ROM
Modem
LAN Hub
Networking Appliances
Mouse
Keyboard
General Description
The G901 positive 3.3V voltage regulator features the
ability to source 300mA of output current with a dropout
voltage of typically 0.45V. A low quiescent current is
provided. The typical quiescent current is 0.6mA.
Familiar regulator features such as over temperature
and over current protection circuits are provided to
prevent it from being damaged by abnormal operating
conditions.
Ordering Information
PIN OPTION
ORDER NUMBER PACKAGE TYPE
1 2 3
G901T21U SOT 89 V
OUT
GND V
IN
G901T24U SOT 89 GND VIN V
OUT
* For other package types, pin options and package, please contact us at sales @gmt.com.tw
Order Number Identification
GXXX XX X X
Packing Type
Pin Option
Package Type
Part Number
PACKAGE TYPE PIN OPTION PACKING
T2 : SOT 89
1 2 3
U & D : Tape & Reel Direction
1 : V
OUT
GND VIN T : Tube
2 : V
OUT
VIN GND B : Bag
3 : GND V
OUT
VIN
4 : GND V
IN
V
OUT
5 : V
IN
GND V
OUT
6 : V
IN
V
OUT
GND
Typical Application Package Type
[Note 4]: Type of C
OUT
Top View
1
2
3
SOT 89
G901
I
Q
+
I
O
V
OUT
V
IN
C
OUT
10µF
C
IN
1µF
Top View
1
2
3
SOT 89
Top View
1
2
3
SOT 89
G901
I
Q
+
I
O
V
OUT
V
IN
C
OUT
10µF
C
IN
1µF
G901
I
Q
+
I
O
+
I
O
V
OUT
V
IN
C
OUT
10µF
C
IN
1µF
Ver: 1.0
Mar 22, 2002
TEL: 886-3-5788833
http://www.gmt.com.tw
2
G901
Global Mixed-mode Technology Inc.
Absolute Maximum Ratings
(Note 1)
Input Voltage………………………………….……….10V
Power Dissipation Internally Limited (Note2)
Maximum Junction Temperature………….………150°C
Storage Temperature Range..….…-65°C ≤ T
J
≤+150°C
Lead Temperature, Time for Wave Soldering
SOT89 Package……..……..……………….....260°C, 4s
Continuous Power Dissipation (T
A
= + 25°C)
SOT 89
(1)
………………………….…………………..0.5W
Note
(1)
: See Recommended Minimum Footprint.
Operating Conditions
(Note 1)
Input Voltage…………………………...…………4V ~ 7V
Temperature Range……………….…...0°C ≤ T
J
≤125°C
Electrical Characteristics
VIN =5V, IO = 300mA, CIN=1µF, C
OUT
=10µF. All specifications apply for TA = TJ = 25°C.[Note 3]
PARAMETER CONDITIONS MIN TYP MAX UNITS
Output Voltage
5mA < IO <300mA
3.201 3.3 3.399 V
Line Regulation
4V < VIN < 6.5V, IO = 50mA
3 mV
Load Regulation 10mA < IO < 300mA
28 mV
Output Impedance 100mA DC and 100mA AC, fO = 120Hz
102 mΩ
Quiescent Current VIN = 5V
0.6 mA
Ripple Rejection fi = 120 Hz, 1V
P-P
, Io = 100mA
42 dB
IO = 300mA
450
Dropout Voltage
IO = 50mA
50 100
mV
Short Circuit Current
0.77 A
Over Temperature
150 °C
Note 1:
Absolute Maximum Ratings are limits beyond which damage to the device may occur. Operating
Conditions are conditions under which the device functions but the specifications might not be guaranteed. For
guaranteed specifications and test conditions see the Electrical Characteristics.
Note 2:
The maximum power dissipation is a function of the maximum junction temperature, T
Jmax
; total thermal re-
sistance,
θ
JA
, and ambient temperature TA. The maximum allowable power dissipation at any ambient
temperature is T
Jmax-TA
/
θ
JA
. If this dissipation is exceeded, the die temperature will rise above 150°C and
IC will go into thermal shutdown. For the G901 in SOT89 package,
θ
JA
is 250°C/W(See recommend
minimum footprint). The safe operation in SOT 89, it can see ”Typical Performance Characteristics” (Safe
Operating Area).
Note3:
Low duty pulse techniques are used during test to maintain junction temperature as close to ambient as possible.
Note4:
The type of output capacitor should be tantalum or aluminum.
Definitions
Dropout Voltage
The input/output Voltage differential at which the regulator output no longer maintains regulation against
further reductions in input voltage. Measured when the
output drops 100mV below its nominal value, dropout
voltage is affected by junction temperature, load current and minimum input supply requirements.
Line Regulation
The change in output voltage for a change in input
voltage. The measurement is made under conditions
of low dissipation or by using pulse techniques such
that average chip temperature is not significantly affected.
Load Regulation
The change in output voltage for a change in load
current at constant chip temperature. The measurement is made under conditions of low dissipation or by
using pulse techniques such that average chip temperature is not significantly affected.
Maximum Power Dissipation
The maximum total device dissipation for which the
regulator will operate within specifications.
Quiescent Bias Current
Current which is used to operate the regulator chip
and is not delivered to the load.
Loading...