參數(shù)資料
型號(hào)： ISL88550AIRZ-T
廠商： INTERSIL CORP
元件分類： 穩(wěn)壓器
英文描述： Synchronous Step Down Controller with Sourcing and Sinking LDO Regulator
中文描述： SWITCHING CONTROLLER, 600 kHz SWITCHING FREQ-MAX, PQCC28
封裝： 5 X 5 MM, ROHS COMPLIANT, PLASTIC, MO-220WHHD-1, TQFN-28
文件頁(yè)數(shù)： 7/25頁(yè)
文件大?。?/td> 928K
代理商： ISL88550AIRZ-T
7
FN6168.0
October 12, 2005
14
REFIN
External reference input. This is used to regulate the VTT and VTTR outputs to V
REFIN
/2
15
FB
Feedback Input for Buck output. Connect to AV
DD
for a +1.8V fixed output or to GND for a +2.5V fixed
output. For an adjustable output (0.7V to 5.5V), connect FB to a resistive-divider from the output voltage.
FB regulates to +0.7V.
16
OUT
Output Voltage Sense Connection. Connect directly to the positive terminal of the buck capacitors. OUT
senses the output voltage to determine the on-time for the high-side switching MOSFET (Q1 in the Typical
Application Circuit). OUT also serves as the buck output’s feedback input in fixed-output modes. When
discharge mode is enabled by OVP/UVP, the output capacitor is discharged through an internal 20
resistor connected between OUT and ground.
17
VIN
Input Voltage Sense Connection. Connect to input power source. V
IN
is used only to set the PWM on-time
one-shot timer. This pin can range from 2V to 25V.
18
UGATE
High-Side Gate-Driver Output. Swings from PHASE to BOOT. UGATE is low when in shutdown or UVLO.
19
PHASE
External Inductor Connection. Connect PHASE to the input side of the inductor. PHASE is used for both
current limit and the return supply of the UGATE driver.
20
BOOT
Boost Flying-Capacitor Connection. Connect to an external capacitor according to the Typical Application
Circuit (Figure 27). See Boost-Supply Diode and Capacitor Selection (BOOT).
21
LGATE
Synchronous Rectifier Gate-Driver Output. Swings from PGND to V
DD
.
22
VDD
Supply Input for the LGATE Gate Drive. Connect to +4.5V to +5.5V system supply voltage. Bypass to
PGND1 with a 4.7μF ceramic capacitor.
23
PGND1
Power Ground for BUCK controller. Connect PGND1 externally to the underside of the exposed pad.
24
GND
Analog Ground for both BUCK and LDO. Connect externally to the underside of the exposed pad.
25
SKIP#
Pulse-Skipping Control Input. Connect to AV
DD
for low-noise, forced-PWM mode. Connect to GND to
enable pulse-skipping operation.
26
AVDD
Analog Supply for both BUCK and LDO. Bypass to GND with a 1.0μF ceramic capacitor. A 10
internal
resistor is connected between V
DD
and AV
DD
27
SHDNA#
Shutdown Control Input A. Use to control Buck output. A rising edge on SHDNA# clears the overvoltage
and undervoltage protection fault latches (See Table 2 and Table 3). Connect AV
DD
for normal operation.
28
TP0
Test Pin. Must be connected to GND externally
Pin Descriptions
(Continued)
PIN
NAME
FUNCTION
Typical Operating Characteristics
VIN = 12V, VDDQ = 1.8V, TON = GND, SKIP# = AVDD, circuit of Figure 28, T
A
= 25°C, unless otherwise noted.
FIGURE 1. EFFICIENCY vs LOAD - 1.8V (T
ON
= GND)
FIGURE 2. SWITCHING FREQUENCY vs LOAD (TON = GND)
0
10
20
30
40
50
60
70
80
90
100
0.001
0.01
0.1
1
10
LOAD (A)
E
3V
IN
-SKIP
12V
IN
-SKIP
25V
IN
-SKIP
3V
IN
-PWM
12V
IN
-PWM
25V
IN
-PWM
0.001
0.01
0.1
1
10
LOAD (A)
0
100
200
300
400
500
600
700
F
3V
IN
-SKIP
12V
IN
-PWM
25V
IN
-PWM
3V
IN
-PWM
12V
IN
-SKIP
25V
IN
-SKIP
ISL88550A
相關(guān)PDF資料
PDF描述
ISL88694 Octal Transparent D-Type Latches With 3-State Outputs 20-SOIC -40 to 85
ISL88694IH5 SMBus Accelerator (SMA)
ISL88694IH5-TK SMBus Accelerator (SMA)
ISL88694IH5Z SMBus Accelerator (SMA)
ISL88694IH5Z-TK SMBus Accelerator (SMA)
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
ISL88550AIRZ-T7 功能描述:直流/直流開(kāi)關(guān)轉(zhuǎn)換器 Integrated DDR Power Controller, 28LD 5x5 TQFN Pb-free, 1K O RoHS:否 制造商:STMicroelectronics 最大輸入電壓:4.5 V 開(kāi)關(guān)頻率:1.5 MHz 輸出電壓:4.6 V 輸出電流:250 mA 輸出端數(shù)量:2 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT
ISL88550AIRZ-TR5339 制造商:Intersil Corporation 功能描述:SCM ASSY.INTEGRATED DDR POWER CONTROLLER, 28LD 5X5 TQFN PB-F - Tape and Reel 制造商:Intersil Corporation 功能描述:IC SYNCH STEP DOWN CONT 28TQFN 制造商:Intersil 功能描述:SCM ASSY INTEGRTD DDR PWR CNTRLR
ISL88550AIRZ-TS2715 制造商:Intersil Corporation 功能描述:BROADCOM, ISL88550AIRZ-T W/BUSINESS TRACKING REQUIREMENTS, S - Tape and Reel
ISL88694EVAL 功能描述:EVALUATION BOARD ISL88694 RoHS:否 類別:編程器，開(kāi)發(fā)系統(tǒng) >> 評(píng)估演示板和套件 系列:- 標(biāo)準(zhǔn)包裝:1 系列:PCI Express® (PCIe) 主要目的:接口，收發(fā)器，PCI Express 嵌入式:- 已用 IC / 零件:DS80PCI800 主要屬性:- 次要屬性:- 已供物品:板
ISL88694IH5 功能描述:IC ACCELERATOR SMBUS SOT-5 RoHS:否 類別:集成電路 (IC) >> 接口 - 信號(hào)緩沖器，中繼器，分配器 系列:- 標(biāo)準(zhǔn)包裝:160 系列:- 類型:轉(zhuǎn)發(fā)器 Tx/Rx類型:以太網(wǎng) 延遲時(shí)間:- 電容 - 輸入:- 電源電壓:2.37 V ~ 2.63 V 電流 - 電源:60mA 安裝類型:表面貼裝 封裝/外殼:64-TQFP 裸露焊盤 供應(yīng)商設(shè)備封裝:64-TQFP-EP（10x10） 包裝:托盤 其它名稱:Q5134101
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。

采購(gòu)需求

(若只采購(gòu)一條型號(hào)，填寫(xiě)一行即可)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

*型號(hào) *數(shù)量 廠商 批號(hào) 封裝
添加更多采購(gòu)

我的聯(lián)系方式

*
*
*