ZMR series
Fixed 2.5, 3.3 and 5 volt miniature voltage regulators
Description
The ZMR series of three terminal fixed
positive voltage regulators feature internal
current limit and will shut down under
thermal overload conditions making the
devices difficult to destroy.
The circuit design offers an exceptionally low
quiescent current, only 30µA for the 2.5V
device, ideal for low power applications. The
initial devices in the series regulate to 2.5 or
5V with a drive capability up to 50mA.
The device is designed with space saving in
mind and is available in the small outline SOT23
package. The ZMR250 has expanded its input
voltage range to 22.5V and the ZMR500 has
expanded its input voltage range to 25V;
equalling that of the ZMR25H and ZMR50H
respectively.
The ZMR330 provides a 3.3V output over an
input range of 5V to 24V.
Features
•
•
•
•
•
•
Small outline SOT23 package
2.5V, 3.3V and 5V output
Output current up to 50mA
Very low quiesent current (30µA)
Unconditionally stable
Internal short circuit current limit
Pinout details
SOT23
package suffix - F
3
TO92
package suffix - C
IN
GND
OUT
1
2
3
IN
GND
1
2
Ob
lete
so
OUT
Underside view
Top view
Ordering information
Order reference
ZMR25HCL
ZMR25HCSTZ
ZMR25HFTA
ZMR250CL
ZMR250CSTOB
ZMR250CSTZ
ZMR250FTA
ZMR330FTA
ZMR50HCL
ZMR50HCSTZ
ZMR50HFTA
ZMR500CL
ZMR500CSTZ
ZMR500FTA
ZMR500FTC
Package
TO92
TO92
SOT23
TO92
TO92
TO92
SOT23
SOT23
TO92
TO92
SOT23
TO92
TO92
SOT23
SOT23
Part mark
ZMR25H
ZMR25H
25X
ZMR250
ZMR250
ZMR250
25K
330
ZMR50H
ZMR50H
50R
ZMR500
ZMR500
50K
50K
Status
Obsolete
Obsolete
Obsolete
Obsolete
Obsolete
Obsolete
Active
Active
Obsolete
Obsolete
Obsolete
Obsolete
Obsolete
Active
Obsolete
Reel size
(inches)
Loose
-
7"
Loose
12.5"
-
7"
7"
Loose
-
7"
Loose
Concertina
7"
13"
Quantity
per reel
4000
1500
3000
4000
1500
1500
3000
3000
4000
1500
3000
4000
1500
3000
10000
Tape width
(mm)
-
-
8mm
-
-
-
8mm
8mm
-
-
8mm
-
-
8mm
8mm
Issue 9 - January 2008
© Zetex Semiconductors plc 2008
1
www.zetex.com
ZMR series
Absolute maximum ratings
Input voltage:
ZMR25H, ZMR250
ZMR330
ZMR50H, ZMR500
Package power dissipation
(T
amb
=25 °C)
Output current (I
O
)
Operating temperature
Storage temperature
22.5V
24V
25V
SOT23 500mW (Note 3)
TO92 600mW
100mA
-55 to 125°C
-65 to 150°C
Note:
1. The maximum operating input voltage and output current of the device will be governed bythe
maximum power dissipation of the selected package. Maximum package power dissipationis
specified at 25°C and must be linearly derated to zero at T
amb
=125°C.
2. The following data represents pulse test conditions with junction temperatures as indicated
atthe initiation of the test. Continuous operation of the devices with the stated conditions
mightexceed the power dissipation limits of the chosen package.
3. Maximum power dissipation for the SOT23 package, is calculated assuming that the device
ismounted on a ceramic substrate measuring 15 x 15 x 0.6mm.
Recommended Operating Conditions
Input voltage range
ZMR25H/250
ZMR330
ZMR50H/500
Ambient temperature range
Min
4.2
4.8
7.0
-55
Max
22.5
24
25
125
Unit
V
V
V
°C
Issue 9 - January 2008
© Zetex Semiconductors plc 2008
2
www.zetex.com
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