TPIC74101-Q1_15 Datasheet, PDF (1/31 Pages) Texas Instruments – TPIC74101-Q1 Buck and Boost Switch-Mode Regulator

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TPIC74101-Q1
SLIS140A – OCTOBER 2011 – REVISED DECEMBER 2014
TPIC74101-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%, Buck Mode
– 5 V ±3%, Low-Power or Boost or Boost/buck
Crossover Mode
• Switching Frequency, 380 kHz (typical)
• Input Operating Range, 1.5 V to 40 V, (V_driver)
– 1-A 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
3 Description
The TPIC74101-Q1 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 ±2% for a wide
input-voltage range.
The TPIC74101-Q1 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 RESET Pin.
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 pin).
The TPIC74101-Q1 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 V_OUT during this
fault condition.
Device Information⁽¹⁾
PART NUMBER PACKAGE
BODY SIZE (NOM)
TPIC74101-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
2 Applications
• Automotive Infotainment & Cluster
• Body Electronics
4.7 nF
4.7 nF
L1
L2
Cboot1
V_OUT
L
Vbattery
C
Cboot2
V_driver
R2
A_IN
R1
TPIC74101-Q1
ENABLE
470 nF
Optional
Connection
2.2 nF–150 nF
V_logic
5Vg_ENABLE
REST
CLP
12 kW
R_mod
GND
5_Vg
5V
5 kW
RESET
A_OUT
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.