LRC LMUN2237LT1 Bias resistor transistors npn silicon surface mount transistors with monolithic bias resistor network Datasheet

LESHAN RADIO COMPANY, LTD.
Bias Resistor Transistors
NPN Silicon Surface Mount Transistors
with Monolithic Bias Resistor Network
This new series of digital transistors is designed to replace a single
device and its external resistor bias network. The BRT (Bias Resistor
Transistor) contains a single transistor with a monolithic bias network
consisting of two resistors; a series base resistor and a base–emitter
resistor. The BRT eliminates these individual components by
integrating them into a single device. The use of a BRT can reduce
both system cost and board space. The device is housed in the SOT-23
package which is designed for low power surface mount applications.
LMUN2237LT1
CASE 318–08, STYLE 6
SOT– 23 (TO–236AB)
• Simplifies Circuit Design
• Reduces Board Space
• Reduces Component Count
PIN 2
BASE
(INPUT)
ESD Rating –
R1
R2
PIN 3
COLLECTOR
(OUTPUT)
PIN 1
EMITTER
(GROUND)
MAXIMUM RATINGS (TA = 25°C unless otherwise noted)
Symbol
Value
Unit
Collector-Base Voltage
VCBO
50
Vdc
Collector-Emitter Voltage
VCEO
50
Vdc
IC
100
mAdc
Symbol
Max
Unit
PD
230 (Note 1)
338 (Note 2)
1.8 (Note 1)
2.7 (Note 2)
mW
Rating
Collector Current
THERMAL CHARACTERISTICS
Characteristic
Total Device Dissipation
TA = 25°C
Derate above 25°C
°C/W
Thermal Resistance –
Junction-to-Ambient
RθJA
540 (Note 1)
370 (Note 2)
°C/W
Thermal Resistance –
Junction-to-Lead
RθJL
264 (Note 1)
287 (Note 2)
°C/W
Junction and Storage
Temperature Range
TJ, Tstg
–55 to +150
°C
1. FR–4 @ Minimum Pad
2. FR–4 @ 1.0 x 1.0 inch Pad
LMUN2237LT1-1/4
LESHAN RADIO COMPANY, LTD.
LMUN2237LT1
DEVICE MARKING AND RESISTOR VALUES
Device
Package
Marking
LMUN2237LT1
SOT-23
A8P
R1 (K)
R2 (K)
47
22
3. New devices. Updated curves to follow in subsequent data sheets.
ELECTRICAL CHARACTERISTICS (TA = 25°C unless otherwise noted) (Continued)
Symbol
Min
Typ
Max
Unit
Collector-Base Cutoff Current (VCB = 40 V, IE = 0)
ICBO
–
–
50
nAdc
Collector-Emitter Cutoff Current (VCE = 40 V, IB = 0)
ICEO
–
–
50
nAdc
Emitter-Base Cutoff Current
(VBE = 6.0 V, IC = 0)
IEBO
–
–
0.13
Characteristic
OFF CHARACTERISTICS
mAdc
Collector-Base Breakdown Voltage (IC = 10 µA, IE = 0)
V(BR)CBO
50
–
–
Vdc
Collector-Emitter Breakdown Voltage (Note 4)
(IC = 2.0 mA, IB = 0)
V(BR)CEO
50
–
–
Vdc
hFE
80
140
–
VCE(sat)
–
–
0.25
Vdc
0.2
Vdc
ON CHARACTERISTICS (Note 4)
DC Current Gain
(VCE = 10 V, IC = 5.0 mA)
Collector-Emitter Saturation Voltage (IC = 10 mA, IB = 5 mA)
Output Voltage (on)
(VCC = 5.0 V, VB = 4.0 V, RL = 1.0 kΩ)
VOL
Input Resistor
R1
Resistor Ratio
R1/R2
–
32.9
–
47
2.1
1.7
61.1
kΩ
2.6
4. Pulse Test: Pulse Width < 300 µs, Duty Cycle < 2.0%
PD, POWER DISSIPATION (mW)
350
250
200
150
100
50
0
–50
RθJA = 370°C/W
0
50
100
TA, AMBIENT TEMPERATURE (°C)
150
Figure 1. Derating Curve
LMUN2237LT1-2/4
LESHAN RADIO COMPANY, LTD.
1000
1
VCE = 10 V
IC/IB = 10
75°C
hFE, DC CURRENT GAIN
VCE(sat), COLLECTOR VOLTAGE (VOLTS)
TYPICAL ELECTRICAL CHARACTERISTICS – LMUN2237LT1
TA = –25°C
25°C
75°C
0.1
0.01
0
5
10
20
30
15
25
IC, COLLECTOR CURRENT (mA)
35
10
IC, COLLECTOR CURRENT (mA)
1
Figure 2. V CE(sat) versus IC
2
IC, COLLECTOR CURRENT (mA)
100
1.4
1.2
1
0.8
0.6
f = 1 MHz
lE = 0 V
TA = 25°C
75°C
TA = –25°C
10
25°C
1
0.1
0.01
VO = 5 V
0.001
0
5
10
15
20
25
30
35
40
VR, REVERSE BIAS VOLTAGE (VOLTS)
Figure 4. Output Capacitance
45
0
2
4
6
8
10
12
Vin, INPUT VOLTAGE (VOLTS)
14
16
Figure 5. Output Current versus Input Voltage
100
Vin, INPUT VOLTAGE (VOLTS)
Cob, CAPACITANCE (pF)
1.6
0.2
0
100
Figure 3. DC Current Gain
1.8
0.4
25°C
10
1
40
TA = –25°C
100
VO = 0.2 V
TA = –25°C
25°C
75°C
10
1
0
5
15
25
10
20
30
IC, COLLECTOR CURRENT (mA)
35
40
Figure 6. Input Voltage versus Output Current
LMUN2237LT1-3/4
LESHAN RADIO COMPANY, LTD.
LMUN2237LT1
SOT-23
NOTES:
A
1. DIMENSIONING AND TOLERANCING PER ANSI
L
Y14.5M, 1982.
2. CONTROLLING DIMENSION: INCH.
3
1
V
2
B S
DIM
G
A
B
C
D
G
H
J
K
L
S
V
C
D
H
K
J
INCHES
MIN
MAX
0.1102
0.1197
0.0472
0.0551
0.0350
0.0440
0.0150
0.0200
0.0701
0.0807
0.0005
0.0040
0.0034
0.0070
0.0140
0.0285
0.0350
0.0401
0.0830
0.1039
0.0177
0.0236
MILLIMETERS
MIN
MAX
2.80
3.04
1.20
1.40
0.89
1.11
0.37
0.50
1.78
2.04
0.013
0.100
0.085
0.177
0.35
0.69
0.89
1.02
2.10
2.64
0.45
0.60
PIN 1. BASE
2. EMITTER
3. COLLECTOR
0.037
0.95
0.037
0.95
0.079
2.0
0.035
0.9
0.031
0.8
inches
mm
LMUN2237LT1-4/4
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