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參數(shù)資料
型號(hào): TPS55383PWPRG4
廠商: TEXAS INSTRUMENTS INC
元件分類: 穩(wěn)壓器
英文描述: 7 A DUAL SWITCHING CONTROLLER, 300 kHz SWITCHING FREQ-MAX, PDSO16
封裝: PLASTIC, HTSSOP-26
文件頁(yè)數(shù): 2/45頁(yè)
文件大?。?/td> 1318K
代理商: TPS55383PWPRG4
DEVICE INFORMATION
PIN CONNECTIONS
1
2
3
4
16
15
14
13
PVDD2
BOOT2
SW2
BP
PVDD1
BOOT1
SW1
GND
5
6
7
12
11
10
SEQ
ILIM2
FB2
EN1
EN2
FB1
Thermal Pad
(bottom side)
HTSSOP (PWP)
(Top View)
8
9
COMP2
COMP1
SLUS818 – SEPTEMBER 2008 ......................................................................................................................................................................................... www.ti.com
TERMINAL FUNCTIONS
TERMINAL
I/O
DESCRIPTION
NAME
NO.
Input supply to the high side gate driver for Output 1. Connect a 22-nF to 82-nF capacitor from this pin
to SW1. This capacitor is charged from the BP pin voltage through an internal switch. The switch is
BOOT1
2
I
turned ON during the OFF time of the converter. To slow down the turn ON of the internal FET, a small
resistor (1
to 3 ) may be placed in series with the bootstrap capacitor.
Input supply to the high side gate driver for Output 2. Connect a 22-nF to 82-nF capacitor from this pin
to SW2. This capacitor is charged from the BP pin voltage through an internal switch. The switch is
BOOT2
15
I
turned ON during the OFF time of the converter. To slow down the turn ON of the internal FET, a small
resistor (1
to 3 ) may be placed in series with the bootstrap capacitor.
Regulated voltage to charge the bootstrap capacitors. Bypass this pin to GND with a low ESR (4.7-
F
BP
13
-
to 10-
F X7R or X5R) ceramic capacitor.
Output of Error Amplifier for Output 1. A series connected R-C network from this pin to GND serves to
COMP1
8
O
compensate the feedback loop. See Feedback Loop Compensation Component Selection for further
information.
Output of Error Amplifier for Output 2. A series connected R-C network from this pin to GND serves to
COMP2
9
O
compensate the feedback loop. See Feedback Loop Compensation Component Selection for further
information.
Active low enable input for Output 1. If the voltage on this pin is greater than 1.55 V, Output 1 is
disabled (high-side switch is OFF). A voltage of less than 0.9 V enables Output 1 and allows soft start of
EN1
5
I
Output 1 to begin. An internal current source drives this pin to PVDD2 if left floating. Connect this pin to
GND for "always ON" operation.
Active low enable input for Output 2. If the voltage on this pin is greater than 1.55 V, Output 2 is
disabled (high-side switch is OFF). A voltage of less than 0.9 V enables Output 2 and allows soft start of
EN2
6
I
Output 2 to begin. An internal current source drives this pin to PVDD2 if left floating. Connect this pin to
GND for "always ON" operation.
Voltage feedback pin for Output 1. The internal transconductance error amplifier adjusts the PWM for
Output 1 to regulate the voltage at this pin to the internal 0.8-V reference. A series resistor divider from
FB1
7
I
Output 1 to ground, with the center connection tied to this pin, determines the value of the regulated
output voltage. Compensation for the feedback loop is provided externally to the device. See Feedback
Loop Compensation Component Selection section for further information.
Voltage feedback pin for Output 2. The internal transconductance error amplifier adjusts the PWM for
Output 2 to regulate the voltage at this pin to the internal 0.8-V reference. A series resistor divider from
FB2
10
I
Output 2 to ground, with the center connection tied to this pin, determines the value of the regulated
Output voltage. Compensation for the feedback loop is provided externally to the device. See Feedback
Loop Compensation Component Selection section for further information.
GND
4
-
Ground pin for the device. Connect directly to Thermal Pad.
Current limit adjust pin for Output 2 only. This function is intended to allow a user with asymmetrical
load currents (Output 1 load current much greater than Output 2 load current) to optimize component
ILIM2
11
I
scaling of the lower current output while maintaining proper component derating in a overcurrent fault
condition. The discrete levels are available as shown in Table 2, Current Limit Threshold Adjustment for
Output 2. Note: An internal 2-resistor divider (150-k
each) connects BP to ILIM2 and to GND.
10
Copyright 2008, Texas Instruments Incorporated
Product Folder Link(s): TPS55383 TPS55386
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