PSRS-78xxLF - PEAK electronics GmbH

PSRS-78xxLF
Mainzer Straße 151–153
D-55299 Nackenheim
Tel. +49 6135 7026-0
Fax: +49 6135 931070
www.peak-electronics.de
[email protected]
PME02-SERIES
Rev.09-2009
500 mA Switching Regulator
Wide Input
SMD Plastic Package
Non-Isolated & Regulated
Adjustable Output Voltage
SC Prot. / Thermal Shutdown
Remote ON/OFF Control
The PME02-500mA Series with high efficiency switching regulators are
ideally supply for space constrained mobile applications. They are no need
for any heat sinks, even if operate at +85°C. The additional features include
remote ON/OFF control and adjustable output voltage. Super low ripple and
noise of typically only 10mV and a shutdown input current of typically only
15uA.
All specifications typical at Ta=25°C, nominal input voltage and full load unless otherwise specified
Input Specifications
Voltage Range
Wide Input (See Table)
Output Specifications
Voltage Accuracy (100% load)
Short Circuit Protection
Line Regulation
Load Regulation (10% - 100% load)
Ripple and Noise (20Mhz bandwidth)
Output Current Limit
Temperature Coefficient
± 2%, typ.
Continuous (Hiccup / Automatic Recovery)
± 0.2%, typ.
± 0.3%, typ.
25 mV pk-pk, max.
1.8 A
± 0.02% / °C
General Specifications
Dynamic Load Stability (100% <-> 10% load)
Quiescent current (nom. Input, 3.3 and 5 Vout)
Thermal Shutdown
Capacitance Load
ON/OFF control current ON: open or 1.5<Vc≤6
OFF: GND or 0V<Vc<1V
± 30 mV, typ.
15 mA, typ
160°C
1000 uF, max.
2 uA, typ.
Shutdown Input Current
ON/OFF Shutdown Threshold Voltage
Reliability Calculated MTBF (MIL-HDBK-217F)
30 uA, max.
1.1 V, min / 1.25 V, typ. / 1.4 V, max.
≥ 2 Mhrs
Physical Specifications
Case Material
Weight
Non Conductive Black Plastic (UL94V-0 rated)
~ 2.3 g, typ.
Environment Specifications
Operating Temperature
Maximum Case Temperature
Storage Temperature
Cooling
-40 to +85°C (ambient)
100°C
-55 to +125°C
Free Air Convection (10mm distance required)
PME02-Series – PSRS-78xxLF – Switching Regulator – SMD – Plastic Case
Specification can change without a notice – We accept no liability for any inaccuracy or printing errors.
Page 1/4
Selection Guide
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ienc
t Vo
t Vo
pu t
pu t
re n t
In p u
In p u
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om .
Order #
PSRS-783R3LF
PSRS-7805LF
PSRS-7812LF
PSRS-7815LF
12
12
24
24
DC)
4.5 - 28
6.0 - 28
14 - 28
17 - 28
3.3
5
12
15
1.8 - 5.5
2.5 - 8.0
4.5 - 13.5
4.5 - 15.5
500
500
500
500
90
94
95
96
If you need other specifications, please enquire.
Notes:
PME02-Series – PSRS-78xxLF – Switching Regulator – SMD – Plastic Case
Specification can change without a notice – We accept no liability for any inaccuracy or printing errors.
Page 2/4
11.82
(0.47)
8.50
(0.34)
Package / Pinning / Derating
PIN CONNECTIONS
#
Switching Reg.
1
+Vin
5
+Vout
6
Vadj
7
GND
9
GND
10
ON/OFF
others Omitted
OUTPUT POWER
TEMPERATURE DERATING GRAPH
100%
75%
50%
25%
71
-40 -20
0
20
40
60
85
80 100
AMBIENT TEMPERATURE (°C)
250
P eak.Temp 240 C
10 S ec Max
External Capacitor Table
220 C
Temperature ( C)
200
90 Sec Max
(>2 2 0 C)
Part
C1
C2
Number
(ceramic cap.) (ceramic cap.)
PSRS-783R3LF
10uF/50V
22uF/16V
PSRS-7805LF
10uF/50V
22uF/16V
PSRS-7812LF
10uF/50V
10uF/25V
PSRS-7815LF
10uF/50V
10uF/25V
150
100
50
0
Time (s ec .)
Vin
1
C1
10
7 ,9
*L
5
PSRS-7805LF
K7805T-500
6
R1
106K/50V
226K/25V
ON/OF F
GND
C2
C5
470pF
Vout
C3
100µ F
R2
GND
1. C1,C2: Choose a ceramic type capacitors; C3 is require ,for best performance, use a 100µF or
more capacitor please.
2. C1,C2 are require and should be placed close to the pins of the converter, with shortest possible traces.
3. No parallel connection or plug and play.
*L: To reduce output ripple, it is recommended to add a LC filter to output port. Recommended parameter: 10µH ~ 47µH.
PME02-Series – PSRS-78xxLF – Switching Regulator – SMD – Plastic Case
Specification can change without a notice – We accept no liability for any inaccuracy or printing errors.
Page 3/4
App Notes
The ON/OFF pin provides several features for adjusting and sequencing the power supply, a user has
the flexibility of using the ON/OFF pin as:
1) A digital on/off control by pulling down the ON/OFF pin with an open-drain transistor.
ON/OFF
2) Line UVLO. If desired to achieve a UVLO voltage, an resistor divider from Vin to ON/OFF to GND
can be used to disable the converter until a higher input voltage is achieved. For example, it is not
useful for a converter with 12V output to start up with a 12V input voltage, as the output cannot teach
regulation. To enable the converter when the input voltage reaches 14V, a 51kΩ/5kΩ resistor divider
from Vin to GND can be connected to the ON/OFF pin. Both the precision 1.25V threshold and 150mV
hysteresis are multiplied by the resistor ratio, providing a proportional 12% hysteresis for any startup
threshold. So, the turn off threshold would be between 12.3V to 15.7V.
DC/DC
Converter
1
51KΩ
C1
10
7,9
+Vout
5
6
100µ F
470pF
5KΩ
Load
Vin
GND
2) Power supply sequencing. By connecting a small capacitor from ON/OFF to GND, the 2µA current
source and 1.25V threshold can provide a stable and predictable delay between start-up of
multiple power supplies. For example, a start-up delay of roughly 64mS is provided using 100nF,
and roughly 136mS by using 200nF.
C1
10
7,9
6
C5
470pF
GND
D C/D C
1 Converter 5
Vin
+Vout
100µ F
Vout
(nominal)
PSRS-783R3LF
6
470pF
100µ F
200nF
Delay time: 64mS
Part #
7,9
C5
GND
100nF
10
C1
+Vout
Load
D C/DC
Converter 5
1
Load
Vin
Delay time: 136mS
Vout adjust up R2 (kOhm)
75 .10 − 10 * Vout
Vout − 3.3
91.52 − 10 * Vout
Vout − 5
Vout adjust down R1 (kOhm)
61 * Vout − 75 .10
3.3 − Vout
61 * Vout − 91.52
5 − Vout
3.3
=
PSRS-7805LF
5
=
PSRS-7812LF
12
=
287 .02 − 20 * Vout
Vout − 12
=
71 * Vout − 287 .02
12 − Vout
PSRS-7815LF
15
=
269 .37 − 15 * Vout
Vout − 15
=
66 * Vout − 269 .37
15 − Vout
=
=
The R1, R2 which choose from the table 1 equation are used to set the output voltage. Select the R1
or R2 resistor to provide the desired regulation voltage. R1 is used to set the output voltage to lower,
R2 is used to set the output voltage to higher. If no need to adjust the output voltage, please connect a
ceramic capacitor to GND with 470pF typical value. Insure the output voltage is in the adjust range.
PME02-Series – PSRS-78xxLF – Switching Regulator – SMD – Plastic Case
Specification can change without a notice – We accept no liability for any inaccuracy or printing errors.
Page 4/4