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TPIC74100-Q1
SLIS125B – DECEMBER 2006 – REVISED DECEMBER 2014
TPIC74100-Q1 Buck and Boost Switch-Mode Regulator
1 Features
•1 Qualified for Automotive Applications • AEC-Q100 Qualified With the Following Results:
– Device HBM ESD Classification level 1B for pin 7 (L2), pin 8 (VOUT), pin 9 (5Vg)
– Device HBM ESD Classification 2 for pins 1–6 and 10–20
– Device CDM ESD Classification Level C4B • Switch-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, (Vdriver) – 1-A Load-Current Capability – 200-mA Load-Current Capability Down to 2-V
Input (Vdriver) – 120-mA Load-Current Capability Down to
1.5-V Input (Vdriver) • 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 & Cluster • Body Electronics
3 Description
The TPIC74100 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 TPIC74100 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 pin. Additionally, an alarm (AOUT) feature is activated when the input supply rail Vdriver is below a prescaled specified value (set by the AIN pin).
The TPIC74100 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 pin. 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 VOUT during this fault condition.
Device Information(1)
PART NUMBER
PACKAGE
BODY SIZE (NOM)
TPIC74100-Q1
HTSSOP (20)
6.50 mm x 4.40 mm
(1) For all available packages, see the orderable addendum at the end of the datasheet.
Simplified Schematic
22 µH–100 µH
4.7 nF
4.7 nF
L1
L2
Cboot1
VOUT
L Vbattery
C
Cboot2
Vdriver R2
AIN R1
TPIC74100-Q1 ENABLE
470 nF Optional Connection
2.2 nF–150 nF
Vlogic
5Vg_ENABLE REST CLP
12 kW
Rmod GND
5Vg
5V
5 kW RESET
AOUT
5 kW
SCR1
SCR0 PGND
5V 22 µF–470 µF
5V 1 µF–100 µF
S0183-01
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.
TPIC74100-Q1
SLIS125B – DECEMBER 2006 – REVISED DECEMBER 2014
www.ti.com
Table of Contents
1 Features .................................................................. 1 2 Applications ........................................................... 1 3 Description ............................................................. 1 4 Revision History..................................................... 2 5 Pin Configuration and Functions ......................... 3 6 Specifications......................................................... 4
6.1 Absolute Maximum Ratings ...................................... 4 6.2 ESD Ratings ............................................................ 4 6.3 Recommended Operating Conditions....................... 4 6.4 Thermal Information .................................................. 5 6.5 Dissipation Rating Table ........................................... 5 6.6 Electrical Characteristics........................................... 5 6.7 Switching Characteristics .......................................... 6 6.8 Typical Characteristics .............................................. 7 7 Detailed Description ............................................ 10 7.1 Overview ................................................................. 10
7.2 Functional Block Diagram ....................................... 10 7.3 Feature Description................................................. 11 7.4 Device Functional Modes........................................ 14 8 Applications and Implementation ...................... 17 8.1 Application Information............................................ 17 8.2 Typical Application .................................................. 17 9 Power Supply Recommendations........