TLD5098EL Infineon Technologies, TLD5098EL Datasheet - Page 13

• 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

6
6.1
The internal oscillator is used to determine the switching frequency of the boost regulator. The switching frequency
can be selected from 100 kHz to 500 kHz with an external resistor to GND. To set the switching frequency with an
external resistor the following formula can be applied.
In addition, the oscillator is capable of changing from the frequency set by the external resistor to a synchronized
frequency from an external clock source. If an external clock source is provided on the pin FREQ/SYNC, then the
internal oscillator synchronizes to this external clock frequency and the boost regulator switches at the
synchronized frequency. The synchronization frequency capture range is 250 kHz to 500 kHz.
Figure 4
Figure 5
Datasheet
V
R
CLK
FREQ
4.5 V
0.5 V
=
V
V
FREQ / SYNC
(
V
SYNC,H
SYNC,L
141
Oscillator and Synchronization
Description
Oscillator and Synchronization Block Diagram and Simplified Application Circuit
Synchronization Timing Diagram
SYNC
R
FREQ
×
10
11
−
12
[ ]
t
Ω
SYNC,TR
s
1
)
×
(
f
Clock Frequency
FREQ
Oscillator
Detector
[ ]
t
1
s
SYNC,TR
)
−
(
3
5 .
×
13
Multiplexer
10
3
[ ]
Ω
t
SYNC,PWH
)
T
[ ]
SYNC
Ω
= 1 / f
PWM
Logic
SYNC
Oscillator and Synchronization
Driver
Gate
Rev. 1.0, 2010-10-13
TLD5098EL
2
SWO
t