TPS55065-Q1_15 Datasheet, PDF (1/31 Pages) Texas Instruments – TPS55065-Q1 Buck and Boost Switched-Mode Regulator

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TPS55065-Q1
SLIS132A – OCTOBER 2008 – REVISED MARCH 2015
TPS55065-Q1 Buck and Boost Switched-Mode Regulator
1 Features
•1 Qualified for Automotive Applications
• AEC-Q100 Qualified With the Following Results
– Device Temperature Grade 1: –40°C to
+125°C Ambient Operating Temperature
Range
– Device HBM ESD Classification Level 1B
– Device CDM ESD Classification Level C4B
• Switched-Mode Regulator
– 5 V ±2%, Normal Mode
– 5 V ±3%, Low-Power or Crossover Mode
• Switching Frequency, 440 kHz (Typical)
• Input Operating Range, 1.5 V to 40 V, (V_driver)
– 500-mA Load-Current Capability
– 200-mA Load-Current Capability Down to 2-V
Input (V_driver)
– 120-mA Load-Current Capability Down to
1.5-V Input (V_driver)
• Enable Function
• Low-Power Operation Mode
• Switched 5-V Regulated Output on 5Vg With
Current Limit
• Programmable Slew Rate and Frequency
Modulation for EMI Consideration
• Reset Function With Deglitch Timer and
Programmable Delay
• Alarm Function for Undervoltage Detection and
Indication
• Thermally Enhanced Package for Efficient Heat
Management
2 Applications
• Automotive Infotainment and Cluster
• 12-V Industrial Power Systems
• Servers
3 Description
The TPS55065 is a switched-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 device 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 device 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 5-Vg output is a switched 5-V regulated output
with internal current limiting to prevent assertion of
RESET 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.
Device Information⁽¹⁾
PART NUMBER
PACKAGE
BODY SIZE (NOM)
TPS55065-Q1
HTSSOP (20)
6.50 mm x 4.40 mm
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
Simplified Schematic
Vbattery
L
Vdriver
C
ENABLE
R2
Vlogic
470 nF
AIN
R1
Rmod
12 kW
5Vg_ENABLE
Vreg
Bandgap
Ref
Clock
Modulator
Low-Power Mode
Digital Signal
SCR0
SCR1
CLP
GND
Slew Rate
Control
Low-Power
Mode
Control
Q1
Charge
Osc
Pump
Q2
Switch-Mode
Controller With
Q3
Dead Time
Q4
-
+ Vref
Charge
Pump
-
Inrush
+
Current Limit
+
-
Shutdown
Regulator
Temp
Monitor
Bandgap
Ref
POR With
Delay Timer
Cboot1
L1
External Schottky
Diode Required,
4.7 nF
Max. 0.4 V
@1A
@ 125ºC
22 mH–
100 mH
L2
4.7 nF
Cboot2
VOUT
PGND
5 V Supply
22 µF–470 µF
5Vg
AOUT
5 kW
5Vg_Supply
1 µF–100 µF
5 kW
RESET
REST
2.2 nF–150 nF
B0130-01
All component values are typical.
1
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,
intellectual property matters and other important disclaimers. PRODUCTION DATA.