參數資料
型號: 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
文件頁數: 25/30頁
文件大小: 964K
代理商: TPS61087DSCR
SW
SS
FREQ
IN
SW
AGND
COMP
FB
EN
PGND
10-PIN3mmx3mmx1mmQFN
Thermal
Pad
SLVS821B – MAY 2008 – REVISED MARCH 2010
www.ti.com
PIN ASSIGNMENT
DRC, DSC PACKAGE
(TOP VIEW)
PIN FUNCTIONS
PIN
I/O
DESCRIPTION
NAME
NO.
COMP
1
I/O
Compensation pin
FB
2
I
Feedback pin
EN
3
I
Shutdown control input. Connect this pin to logic high level to enable the device
AGND
4,
Analog ground
Thermal
Pad
PGND
5
Power ground
SW
6, 7
Switch pin
IN
8
Input supply pin
FREQ
9
I
Frequency select pin. The power switch operates at 650 kHz if FREQ is connected to GND and at 1.2 MHz
if FREQ is connected to IN
SS
10
Soft-start control pin. Connect a capacitor to this pin if soft-start needed. Open = no soft-start
TYPICAL CHARACTERISTICS
TABLE OF GRAPHS
FIGURE
IOUT(max)
Maximum load current
vs. Input voltage at High frequency (1.2 MHz)
Figure 1
IOUT(max)
Maximum load current
vs. Input voltage at Low frequency (650 kHz)
Figure 2
h
Efficiency
vs. Load current, VS = 15 V, VIN = 5 V
Figure 3
h
Efficiency
vs. Load current, VS = 9 V, VIN = 3.3 V
Figure 4
PWM switching - discontinuous conduction
Figure 5
PWM switching - continuous conduction
Figure 6
Load transient response
at High frequency (1.2 MHz)
Figure 7
Load transient response
at Low frequency (650 kHz)
Figure 8
Soft-start
Figure 9
Supply current
vs. Supply voltage
Figure 10
Oscillator frequency
vs. Load current
Figure 11
Oscillator frequency
vs. Supply voltage
Figure 12
The typical characteristics are measured with the inductors 7447789003 3.3 H (high frequency) or 74454068
6.8 H (low frequency) from Wurth and the rectifier diode SL22.
4
Copyright 2008–2010, Texas Instruments Incorporated
Product Folder Link(s): TPS61087
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