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TPS767D301MPWPREP

Part # TPS767D301MPWPREP
Description LDO Regulator Pos 1.5V to 5.5V3.3V 1A/1A 28-Pin HTSSOP EP
Category IC
Availability Out of Stock
Qty 0
Qty Price
1 + $4.79955



Technical Document


DISCLAIMER: The information provided herein is solely for informational purposes. Customers must be aware of the suitability of this product for their application, and consider that variable factors such as Manufacturer, Product Category, Date Codes, Pictures and Descriptions may differ from available inventory.

RESET
OUT
OUT
6
5
4
IN
IN
EN
GND
3
28
24
23
V
I
C1
0.1 µF
50 V
RESET
V
O
10 µF
+
TPS767D3xx
C
O
250 k
V
O
+ V
ref
ǒ
1 )
R1
R2
Ǔ
where:
V
ref
= 1.1834 V typ (the internal reference voltage)
R1 +
ǒ
V
O
V
ref
* 1
Ǔ
R2
OUTPUT
VOLTAGE
R1 R2
2.5 V
3.3 V
3.6 V
4 75V
UNIT
33.2
53.6
61.9
90.8
30.1
30.1
30.1
30.1
k
k
k
k
OUTPUT VOLTAGE
PROGRAMMING GUIDE
V
O
V
I
RESET
OUT
FB / NC
R1
R2
GND
EN
IN
<0.5V
>2.7 V
RESET Output
0.1 µF
250 k
+
10 µF
C
O
TPS767D301-EP
www.ti.com
SGLS327A FEBRUARY 2006REVISED APRIL 2010
Figure 26. Typical Application Circuit (Fixed Versions) for Single Channel
Programming the TPS767D301-EP Adjustable LDO Regulator
The output voltage of the TPS767D301-EP adjustable regulator is programmed using an external resistor divider
as shown in Figure 27. The output voltage is calculated using:
(1)
Resistors R1 and R2 should be chosen for approximately 50-mA divider current. Lower-value resistors can be
used, but offer no inherent advantage and waste more power. Higher values should be avoided, as leakage
currents at FB increase the output voltage error. The recommended design procedure is to choose R2 = 30.1 k
to set the divider current at 50 mA and then calculate R1 using:
(2)
Figure 27. TPS767D301-EP Adjustable LDO Regulator Programming
Reset Indicator
The TPS767D301-EP features a RESET output that can be used to monitor the status of the regulator. The
internal comparator monitors the output voltage. When the output drops to 95% (typical) of its regulated value,
the RESET output transistor turns on, taking the signal low. The open-drain output requires a pullup resistor. If
not used, it can be left floating. RESET can be used to drive power-on reset circuitry or as a low-battery
indicator.
Copyright © 2006–2010, Texas Instruments Incorporated Submit Documentation Feedback 13
Product Folder Link(s): TPS767D301-EP
P
D(max)
+
T
J
max * T
A
R
qJA
where:
T
J
max is the maximum allowable junction temperature
T
A
is the ambient temperature.
R
θJA
is the thermal resistance junction-to-ambient for the package, i.e., 27.9°C/W for the 28-terminal
PWP with no airflow.
P
D
+
ǒ
V
I
* V
O
Ǔ
I
O
TPS767D301-EP
SGLS327A FEBRUARY 2006REVISED APRIL 2010
www.ti.com
Regulator Protection
The TPS767D301-EP PMOS-pass transistor has a built-in back-gate diode that safely conducts reverse currents
when the input voltage drops below the output voltage (e.g., during power down). Current is conducted from the
output to the input and is not internally limited. When extended reverse voltage is anticipated, external limiting
may be appropriate.
The TPS767D301-EP also features internal current limiting and thermal protection. During normal operation, the
TPS767D301-EP limits output current to approximately 1.7 A. When current limiting engages, the output voltage
scales back linearly until the overcurrent condition ends. While current limiting is designed to prevent gross
device failure, care should be taken not to exceed the power dissipation ratings of the package. If the
temperature of the device exceeds 150°C (typ), thermal-protection circuitry shuts it down. Once the device has
cooled below 130°C (typ), regulator operation resumes.
Power Dissipation and Junction Temperature
Specified regulator operation is assured to a junction temperature of 125°C; the maximum junction temperature
should be restricted to 125°C under normal operating conditions. This restriction limits the power dissipation the
regulator can handle in any given application. To ensure the junction temperature is within acceptable limits,
calculate the maximum allowable dissipation, P
D(max)
, and the actual dissipation, P
D
, which must be less than or
equal to P
D(max)
.
The maximum power dissipation limit is determined using the following equation:
(3)
The regulator dissipation is calculated using:
(4)
Power dissipation resulting from quiescent current is negligible. Excessive power dissipation triggers the thermal
protection circuit.
14 Submit Documentation Feedback Copyright © 2006–2010, Texas Instruments Incorporated
Product Folder Link(s): TPS767D301-EP
PACKAGING INFORMATION
Orderable Device Status
(1)
Package
Type
Package
Drawing
Pins Package
Qty
Eco Plan
(2)
Lead/Ball Finish MSL Peak Temp
(3)
TPS767D301MPWPREP ACTIVE HTSSOP PWP 28 2000 Green (RoHS &
no Sb/Br)
CU NIPDAU Level-2-260C-1 YEAR
V62/06617-01XE ACTIVE HTSSOP PWP 28 2000 Green (RoHS &
no Sb/Br)
CU NIPDAU Level-2-260C-1 YEAR
(1)
The marketing status values are defined as follows:
ACTIVE: Product device recommended for new designs.
LIFEBUY: TI has announced that the device will be discontinued, and a lifetime-buy period is in effect.
NRND: Not recommended for new designs. Device is in production to support existing customers, but TI does not recommend using this part in
a new design.
PREVIEW: Device has been announced but is not in production. Samples may or may not be available.
OBSOLETE: TI has discontinued the production of the device.
(2)
Eco Plan - The planned eco-friendly classification: Pb-Free (RoHS), Pb-Free (RoHS Exempt), or Green (RoHS & no Sb/Br) - please check
http://www.ti.com/productcontent for the latest availability information and additional product content details.
TBD: The Pb-Free/Green conversion plan has not been defined.
Pb-Free (RoHS): TI's terms "Lead-Free" or "Pb-Free" mean semiconductor products that are compatible with the current RoHS requirements
for all 6 substances, including the requirement that lead not exceed 0.1% by weight in homogeneous materials. Where designed to be soldered
at high temperatures, TI Pb-Free products are suitable for use in specified lead-free processes.
Pb-Free (RoHS Exempt): This component has a RoHS exemption for either 1) lead-based flip-chip solder bumps used between the die and
package, or 2) lead-based die adhesive used between the die and leadframe. The component is otherwise considered Pb-Free (RoHS
compatible) as defined above.
Green (RoHS & no Sb/Br): TI defines "Green" to mean Pb-Free (RoHS compatible), and free of Bromine (Br) and Antimony (Sb) based flame
retardants (Br or Sb do not exceed 0.1% by weight in homogeneous material)
(3)
MSL, Peak Temp. -- The Moisture Sensitivity Level rating according to the JEDEC industry standard classifications, and peak solder
temperature.
Important Information and Disclaimer:The information provided on this page represents TI's knowledge and belief as of the date that it is
provided. TI bases its knowledge and belief on information provided by third parties, and makes no representation or warranty as to the
accuracy of such information. Efforts are underway to better integrate information from third parties. TI has taken and continues to take
reasonable steps to provide representative and accurate information but may not have conducted destructive testing or chemical analysis on
incoming materials and chemicals. TI and TI suppliers consider certain information to be proprietary, and thus CAS numbers and other limited
information may not be available for release.
In no event shall TI's liability arising out of such information exceed the total purchase price of the TI part(s) at issue in this document sold by TI
to Customer on an annual basis.
OTHER QUALIFIED VERSIONS OF TPS767D301-EP :
Catalog: TPS767D301
Automotive: TPS767D301-Q1
NOTE: Qualified Version Definitions:
Catalog - TI's standard catalog product
Automotive - Q100 devices qualified for high-reliability automotive applications targeting zero defects
PACKAGE OPTION ADDENDUM
www.ti.com 26-Apr-2010
Addendum-Page 1
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