Datasheet
1
FEATURES
APPLICATIONS
P0021-02
PWP HTSSOP PACKAGE
(TOP VIEW)
SCR1
Cboot2
Cboot1
V
L1
PGND
L2
V
5
A
driver
OUT
Vg
IN
SCR0
5Vg_ENABLE
ENABLE
V
GND
R
REST
A
RESET
CLP
logic
mod
OUT
20
19
18
17
16
15
14
13
12
11
1
2
3
4
5
6
7
8
9
10
DESCRIPTION
TPS55065-Q1
www.ti.com
............................................................................................................................................................................................... SLIS132 – OCTOBER 2008
BUCK/BOOST SWITCH-MODE REGULATOR
23
• Qualified for Automotive Applications • Switched 5-V Regulated Output on 5Vg With
Current Limit
• Switch-Mode Regulator
• Programmable Slew Rate and Frequency
– 5 V ± 2%, Normal Mode
Modulation for EMI Consideration
– 5 V ± 3%, Low-Power or Crossover Mode
• Reset Function With Deglitch Timer and
• Switching Frequency, 440 kHz (typical)
Programmable Delay
• Input Operating Range, 1.5 V to 40 V, (V
driver
)
• Alarm Function for Undervoltage Detection
– 500-mA Load-Current Capability
and Indication
– 200-mA Load-Current Capability Down to
• Thermally Enhanced Package for Efficient
2-V Input (V
driver
)
Heat Management
– 120-mA Load-Current Capability Down to
1.5-V Input (V
driver
)
• Enable Function
• Automotive Electronic Controller Power
Supply
• Low-Power Operation Mode
The TPS55065 is a switch-mode regulator with integrated switches for voltage-mode control. With the aid of
external components (LC combination), the device regulates the output to 5 V ± 3% for a wide input-voltage
range.
The TPS55065 offers a reset function to detect and indicate when the 5-V output rail is outside of the specified
tolerance. This reset delay is programmable using an external timing capacitor on the REST terminal.
Additionally, an alarm (A
OUT
) feature is activated when the input supply rail V
driver
is below a prescaled specified
value (set by the A
IN
terminal).
The TPS55065 has a frequency-modulation scheme to minimize EMI. The clock modulator permits a modulation
of the switching frequency to reduce interference energy in the frequency band.
The 5Vg output is a switched 5-V regulated output with internal current limiting to prevent RESET from being
asserted when powering a capacitive load on the supply line. This function is controlled by the 5Vg_ENABLE
terminal. If there is a short to ground on this output (5Vg output), the output self-protects by operating in a
chopping mode. This does, however, increase the output ripple voltage on V
OUT
during this fault condition.
1
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas
Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
2 PowerPAD is a trademark of Texas Instruments.
3 All other trademarks are the property of their respective owners.
PRODUCTION DATA information is current as of publication date.
Copyright © 2008, Texas Instruments Incorporated
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.