LM4040DIM3-5.0+T Maxim Integrated Products, LM4040DIM3-5.0+T Datasheet - Page 11

• Manufacturer Part Number: LM4040DIM3-5.0+T
• Description: IC VREF PREC MICROPWR SOT23-3
• Manufacturer: Maxim Integrated Products

Specifications of LM4040DIM3-5.0+T

• Reference Type: Shunt
• Voltage - Output: 5V
• Tolerance: ±1%
• Temperature Coefficient: 150ppm/°C
• Number Of Channels: 1
• Current - Cathode: 85µA
• Current - Output: 15mA
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: SOT-23-3, TO-236-3, Micro3™, SSD3, SST3
• Product: Voltage References
• Topology: Shunt References
• Output Voltage: 5 V
• Initial Accuracy: 1 %
• Average Temperature Coefficient (typ): 150 PPM / C
• Shunt Current (max): 15 mA
• Maximum Operating Temperature: + 85 C
• Minimum Operating Temperature: - 40 C
• Mounting Style: SMD/SMT
• Shunt Current (min): 60 uA
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Voltage - Input: -
• Current - Quiescent: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• Other names: LM4040DIM3-5.0+T

The LM4040 shunt references use the bandgap princi-
ple to produce a stable, accurate voltage. The device
behaves similarly to an ideal zener diode; a fixed volt-
age is maintained across its output terminals when
biased with 60µA to 15mA of reverse current. The
LM4040 behaves similarly to a silicon diode when
biased with forward currents up 10mA.
Figure 3 shows a typical operating circuit. The LM4040
is ideal for providing a stable reference from a high-
voltage power supply.
The LM4040’s internal pass transistor is used to maintain a
constant output voltage (V
amount of current across a source resistor. The source
resistance (R
range, supply voltage (V
quiescent current.
Choose the value of R
is at a maximum. Maintain a minimum I
times. The R
I
maximum and I
to the device, I
Therefore, the value of R
equation:
Choosing a larger resistance minimizes the total power dis-
sipation in the circuit by reducing the shunt current
(P
incorporate the worst-case tolerance of the resistor used.
Ensure that the resistor’s power rating is adequate, using
the following general power equation:
The LM4040 does not require an external capacitor for fre-
quency stability and is stable for any output capacitance.
Reference with Multiple Reverse Breakdown Voltages
SHUNT
D(TOTAL)
PIN
1
2
3
[V
less than 15mA for proper regulation when V
S(MIN)
[V
PD
NAME
= V
S
S(MAX)
N.C.
S
) is determined from the load current (I
SHUNT
R
+
−
LOAD
value should be large enough to keep
- V
S
Applications Information
= I
Improved Precision Micropower Shunt Voltage
✕
R
SHUNT
______________________________________________________________________________________
- V
I
] / [60µA + I
SHUNT
should never exceed 20mA.
S
is at a minimum. To prevent damage
Positive Terminal of the Shunt Reference
Negative Terminal of the Shunt Reference
No connection. Leave this pin unconnected or connected to pin 2.
R
when V
Detailed Description
S
] / [20mA + I
) variations, V
SHUNT
✕
S
(V
). Provide a safety margin to
is bounded by the following
S(MAX)
S
Output Capacitance
LOAD(MAX)
is at a minimum and I
) by sinking the necessary
LOAD(MIN)
- V
SHUNT
SHUNT
SHUNT
] > R
, and desired
of 60µA at all
)
]
S
>
LOAD
LOAD
S
is
)
The LM4040 typically exhibits an output voltage tem-
perature coefficient within ±15ppm/°C. The polarity of
the temperature coefficient may be different from one
device to another; some may have positive coefficients,
and others may have negative coefficients.
The maximum junction temperature of the LM4040 is
+150°C. The maximum operating temperature for the
LM4040_E_ is +125°C. At a maximum load current of 15mA
and a maximum output voltage of 5V, the part will dissipate
75mW of power. The power dissipation limits of the 3-pin
SC70 call for a derating value of 2.17mW/°C above +70°C
and thus for 75mW of power dissipation, the part will self-
heat to 35.56°C above ambient temperature. If the ambient
temperature is +125°C, the part operates at 159.56°C,
thereby exceeding the maximum junction temperature
value of +150°C. For high-temperature operation, care must
be taken to ensure the combination of ambient temperature,
output power dissipation and package thermal resistance
does not conspire to raise the device temperature beyond
that listed in the Absolute Maximum Ratings. Either reduce
the output load current or the ambient temperature to keep
the part within the limits.
Figure 3. Typical Operating Circuit
TRANSISTOR COUNT: 60
PROCESS: BiCMOS
FUNCTION
High Temperature Operation
I
SHUNT
Temperature Performance
R
S
V
S
I
Chip Information
SHUNT
LM4040
I
LOAD
Pin Description
+ I
LOAD
V
R
11