參數(shù)資料
型號(hào)： TPS61087DSCR
廠商： TEXAS INSTRUMENTS INC
元件分類： 穩(wěn)壓器
英文描述： 4.8 A SWITCHING REGULATOR, 1500 kHz SWITCHING FREQ-MAX, PDSO10
封裝： GREEN, PLASTIC, SON-10
文件頁(yè)數(shù)： 5/30頁(yè)
文件大?。?/td> 964K
代理商： TPS61087DSCR
www.ti.com
SLVS821B – MAY 2008 – REVISED MARCH 2010
RC_ESR
Output capacitors equivalent series resistance (ESR)
ΔVC_ESR can be neglected in many cases since ceramic capacitors provide low ESR.
Frequency Select Pin (FREQ)
The frequency select pin FREQ allows to set the switching frequency of the device to 650 kHz (FREQ = low) or
1.2 MHz (FREQ = high). Higher switching frequency improves load transient response but reduces slightly the
efficiency. The other benefits of higher switching frequency are a lower output ripple voltage. The use of a 1.2
MHz switching frequency is recommended unless light load efficiency is a major concern.
Undervoltage Lockout (UVLO)
To avoid mis-operation of the device at low input voltages an undervoltage lockout is included that disables the
device, if the input voltage falls below 2.4 V.
Thermal Shutdown
A thermal shutdown is implemented to prevent damages due to excessive heat and power dissipation. Typically
the thermal shutdown happens at a junction temperature of 150°C. When the thermal shutdown is triggered the
device stops switching until the junction temperature falls below typically 136°C. Then the device starts switching
again.
Overvoltage Prevention
If overvoltage is detected on the FB pin (typically 3 % above the nominal value of 1.238 V) the part stops
switching immediately until the voltage on this pin drops to its nominal value. This prevents overvoltage on the
output and secures the circuits connected to the output from excessive overvoltage.
Copyright 2008–2010, Texas Instruments Incorporated
13
Product Folder Link(s): TPS61087
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