參數(shù)資料
型號: L5989D
廠商: STMICROELECTRONICS
元件分類: 穩(wěn)壓器
英文描述: 5.06 A SWITCHING REGULATOR, 1000 kHz SWITCHING FREQ-MAX, PDSO16
封裝: ROHS COMPLIANT, HTSSOP-16
文件頁數(shù): 49/51頁
文件大?。?/td> 1947K
代理商: L5989D
L5989D
Pin function
Doc ID 15778 Rev 3
7/51
2
Pin function
Figure 2.
Pin connection
Table 1.
Pinout description
N.
Name
Description
1, 16
OUT
Regulator output
2, 3
VIN
Unregulated DC input voltage
4
VCC
Unregulated DC signal input voltage
5
SS/INH
An external logic signal (active LOW) disables the device. In case the pin is
floating the device deliver a constant current (22
μA typ.) to charge the
soft-start capacitor (see Chapter 5.4)
6
COMP
Error amplifier output for frequency compensation
7
ILIM-ADJ
Connecting a pull-up resistor to VREF or a pull-down resistor to GND the
internal current limit thresholds can be tuned to match the local application.
In case the pin is left floating no changes are applied to the default current
limit thresholds
8FB
Feedback input. Connecting the output voltage directly to this pin results in
a regulation voltage of 600 mV. An external resistive divider is required for
higher output voltages
9
PGOOD
Open collector output; low impedance if the feedback voltage is lower than
0.85 times the internal reference of the error amplifier. An hysteresis is
provided
10
FSW
Connecting a pull-up resistor to VREF or a pull-down resistor to GND the
internal oscillator frequency will be increased or decreased respectively. In
case the pin is left floating the predefined oscillator frequency
(400 kHz ± 10%) is active
11
U/O/S
Multifunction pin used to program additional features: UVLO thresholds,
OVP latched/not latched, SINK enabled/disabled
12
VREF
1.8 V voltage reference
13
SGND
Signal ground
14, 15
PGND
Power ground
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