sr087 Supertex, Inc., sr087 Datasheet - Page 2

• Manufacturer Part Number: sr087
• Description: Adjustable Off-line Inductorless Switching Regulator
• Manufacturer: Supertex, Inc.

Ordering Options
-G indicates package is RoHS compliant (‘Green’)
Absolute Maximum Ratings
Absolute Maximum Ratings are those values beyond which damage to the
device may occur. Functional operation under these conditions is not implied.
Continuous operation of the device at the absolute rating level may affect device
reliability. All voltages are referenced to device ground.
Recommended Operating Conditions
Specifi cations
(Unless otherwise noted, T
Parameter
Output Voltage (V
Feedback Voltage (V
Enable Voltage (V
Operating Junction Temperature
Symbol
Symbol
V
V
V
Device (V
I
V
OUT(int)
SR086 (3.3V)
SR087 (5.0V)
V
GATE(hi)
GATE(lo)
V
I
FB(hys)
I
FB(off)
OUT
GD
OUT
GD
REG
Current consumption at V
Current consumption of the lower
circuitry
Gate drive supply voltage
GATE output high voltage
GATE output low voltage
Feedback voltage (GATE off)
Feedback voltage hysteresis
Parameter
Output voltage
Load on V
including feedback divider and load
on V
Parameter
)
REG
OUT
EN
)
A
)
FB
= -40°C to +85°C, Voltages referenced to GND pin)
)
OUT
Package Options
8-Lead SOIC
SR086SG-G
SR087SG-G
1
-40
GD
1
1
-0.3V to 6.5V
-0.3V to 6.5V
o
-0.3V to 56V
C to +125
Value
1.18
o
Min
Min
100
C
11
11
9
-
-
-
-
2
Typ
Typ
Pinout
Backside on the SO-8 package is at ground potential and may be connected
to ground or left unconnected.
Pin Description
1.25
13
50
-
-
Name
GATE
GND
-
-
-
-
V
V
V
EN
V
FB
REG
OUT
GD
IN
Max
Max
50
1.31
-
400
0.5
Pin #
60
15
15
-
1
2
3
4
5
6
7
8
V
GND
REG
V
EN
Units
Units
IN
µA
V
mV
Description
Rectifi ed AC input voltage
Active low enable input
Circuit ground
Note: circuit ground will be at the AC line potential
Regulated output voltage, fi xed 3.3V or
5.0V
Feedback input
Output voltage (9.0V - 50V adj.)
Gate drive supply (referenced to V
Drives external IGBT pass transistor
µA
µA
V
V
V
V
Conditions
---
---
Conditions
---
V
---
---
---
---
---
Heat Slug
SO-8
OUT
= 9-50V
SR086/SR087
V
V
GATE
V
GD
OUT
FB
OUT
NR040306
)