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  2002
MOS FIELD EFFECT TRANSISTOR
μ
PA1809
N-CHANNEL MOS FIELD EFFECT TRANSISTOR
FOR SWITCHING
DATA  SHEET
Document No. G16273EJ1V0DS00 (1st edition)
Date Published August 2002  NS  CP(K)
Printed in Japan
DESCRIPTION
  The 
μ
PA1809 is a switching device which can be
driven directly by a 4.0 V power source.
  This device features a low on-state resistance and
excellent switching characteristics, and is suitable for
applications such as DC/DC Converters and power
management of notebook computers and so on.
FEATURES
 4.0 V drive available
 Low on-state resistance
R
DS(on)1
 = 21 m
 MAX. (V
GS
 = 10 V, I
D
 = 4.0 A)
R
DS(on)2
 = 29 m
 MAX. (V
GS
 = 4.5 V, I
D
 = 4.0 A)
    R
DS(on)3
 = 32 m
 MAX. (V
GS
 = 4.0 V, I
D
 = 4.0 A)
  Built-in G-S protection diode against ESD
ORDERING INFORMATION
PART NUMBER
PACKAGE
μ
PA1809GR-9JG
Power TSSOP8
ABSOLUTE MAXIMUM RATINGS (T
A
 = 25°C)
Drain to Source Voltage (V
GS
 = 0 V)
V
DSS
30
V
Gate to Source Voltage (V
DS
 = 0 V)
V
GSS
±20
V
Drain Current (DC) (T
A
 = 25°C)
Drain Current (pulse)
 Note1
Total Power Dissipation 
 Note2
I
D(DC)
±8.0
A
I
D(pulse)
±32
A
P
T
2.0
W
Channel Temperature
T
ch
150
°C
Storage Temperature
T
stg
55 to +150
°C
Notes 1.
 PW 
≤
 10 
μ
s, Duty Cycle 
≤
 1%
2.
 Mounted on ceramic substrate of 5000
mm
2
 x 1.1
mm
Remark
The diode connected between the gate and source of the transistor serves as a protector against ESD.  When
this device actually used, an additional protection circuit is externally required if a voltage exceeding the rated
voltage may be applied to this device.
PACKAGE DRAWING (Unit: mm)
1
4
8
5
6.4 ±0.2
4.4 ±0.1
1.0 ±0.2
0
±
0.1
1
2, 3
4
5
6, 7
8
:Drain1
:Source1
:Gate2
:Source2
:Drain2
0.8 MAX.
3.15 ±0.15
3.0 ±0.1
0.65
0.10  M
0.27
+0.03
0.25
0.5
0.6
+0.15
3
°
+5
°
–3
°
1.2 MAX.
1.0±0.05
0.1±0.05
EQUIVALENT CIRCUIT
Source
Body
Diode
Gate
Protection
Diode
Gate
Drain
4 
  :Gate