TLD5098EL Infineon Technologies, TLD5098EL Datasheet - Page 19

• Manufacturer Part Number: TLD5098EL
• Description: IC DC-DC CTRLR BUCK BOOST 14SSOP
• Manufacturer: Infineon Technologies

Specifications of TLD5098EL

• Constant Current: Yes
• Constant Voltage: Yes
• Internal Driver: No
• Type - Primary: Automotive
• Mounting Type: Surface Mount
• Topology: PWM, SEPIC, Step-Down (Buck), Step-Up (Boost)
• Number Of Outputs: 1
• Frequency: 100kHz ~ 500kHz
• Voltage - Supply: 4.5 V ~ 45 V
• Voltage - Output: 4.5 V ~ 5.5 V
• Package / Case: 14-LSSOP (0.150", 3.95mm Width) Exposed Pad
• Packages: PG-SSOP-14
• Vs (min): 4.75 V
• Vs (max): 45.0 V
• Vq (max): -
• Iq (max): -
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Operating Temperature: -
• Lead Free Status / Rohs Status: Details

8
8.1
The internal linear voltage regulator supplies the internal gate drivers with a typical voltage of 5V and current up
to I
required on pin IVCC for stability and buffering transient load currents. During normal operation the external boost
and dimming MOSFET switches will draw transient currents from the linear regulator and its output capacitor.
Proper sizing of the output capacitor must be considered to supply sufficient peak current to the gate of the
external MOSFET switches.
Integrated undervoltage protection for the external switching MOSFET:
An integrated undervoltage reset threshold circuit monitors the linear regulator output voltage (V
the device in case the output voltage falls below the IVCC Undervoltage Reset switch OFF Threshold (
Parameter 8.2.7). The Undervoltage Reset threshold for the IVCC pin helps to protect the external switches from
excessive power dissipation by ensuring the gate drive voltage is sufficient to enhance the gate of an external logic
level N-channel MOSFET.
Figure 8
Datasheet
LIM,min
(Parameter 8.2.2). An external output capacitor with ESR lower than R
Linear Regulator
Description
Voltage Regulator Block Diagram and Simplified Application Circuit
EN / PWMI
IN
13
14
Linear Regulator
19
IVCC,ESR
Drivers
Gate
Rev. 1.0, 2010-10-13
(Parameter 8.2.5) is
Linear Regulator
IVCC
TLD5098EL
1
) and resets
V
IVCC
IVCC,RTH,d