rev.
rev.
page 1 of 6
page
date 06/2008
date
PART NUMBER: V78XX-500 series
DESCRIPTION: DC switching regulator, non-isolated
features
description
·efficiency up to 96%
·no need for heatsinks
·wide input range
·short circuit protection
·thermal shutdown
·low ripple and noise
·pin compatible to LM78XX
series
The V78XX series of switching regulators are
designed to replace 78XX linear regulators,
with the objective of drop-in replacement
without the need for a heatsink, because the
V78XX series features high efficiency under
all line conditions. Built-in short-circuit and
over-temperature protections ensure very
rugged operations. Additionally, low ripple
and noise performance make the parts useful
in a wide range of applications.
·non-isolated
model
number
input voltage
range
4.75~28 Vdc
6.5~32 Vdc
8~32 Vdc
11~32 Vdc
15~32 Vdc
18~32 Vdc
output
voltage
3.3 Vdc
5 Vdc
6.5 Vdc
9 Vdc
output
current
500 mA
500 mA
500 mA
500 mA
500 mA
500 mA
efficiency
Vin_max
Vin_min
90%
93%
94%
95%
V7803-500
V7805-500
V7806-500
V7809-500
V7812-500
V7815-500
80%
84%
87%
91%
92%
93%
12 Vdc
15 Vdc
95%
96%
*see Application Notes section (page 5) for positive to negative conversion options.
OUTPUT SPECIFICATIONS
item
conditions
min.
typ.
2
max.
3
unit
%
output voltage accuracy
at 100% load
line regulation
load regulation
output ripple
Vin = min. to max. at full load
10% to 100% full load
20 MHz bandwidth, output w/ 10μF cap
0.2
0.4
20
0.4
0.6
35
%
%
mVp-p
short circuit protection
short circuit input power
output current limit
switching frequency
dynamic load stability
quiescent current
thermal shutdown
temperature coefficient
max load capacitance
continuous, auto recovery upon removal of short
load impedance is≤ 0.1Ω
subject to over-temp shutdown
0.3
0.8
2000
450
100
7
W
mA
KHz
mV
mA
°C
fixed switching frequency topology
100%<->10% load
280
330
Vin_min to Vin_max at no load
internal IC junction
-40°C ~ 85°C ambient
5
150
0.02
1000
%/°C
μF
GENERAL SPECIFICATIONS
item
conditions
min.
-40
-40
typ.
max.
85
100
125
unit
°C
°C
operating temperature range
operating case temperature
storage temperature range
cooling
see derating curve
-55
°C
free air convection
solderability
storage humidity range
case material
1.5 mm from case for 10 seconds
relative humidity, non-condensing
plastic (UL94-V0)
300
95
°C
%
10
case thermal impedance
MTBF
package weight
70
°C/W
hours
grams
at 25°C per MIL-HDBK-217F
2,000,000
2.0
th
20050 SW 112 Ave. Tualatin, Oregon 97062 phone 503.612.2300 fax 503.612.2382