Position: Home > DataSheet > Index T > TL4 Series > TL497ACPWR, TL497ADR, TL497AI

Low Cost Custom Prototype PCB Manufacturer

TL497ACPWR, TL497ADR, TL497AI

Table of contents:
Info of TL497ACPWR
Info of TL497ADR
Info of TL497AI

TL497ACPWR, TL497ADR, TL497AI Selling Leads, Datasheet

MFG:Texas Instruments (VA) Category:Integrated Circuits (ICs) Package Cooled:TSSOP14 D/C:06+

TL497ACPWR, TL497ADR, TL497AI Datasheet download

Five Points

Part Number: TL497ACPWR

Category: Integrated Circuits (ICs)

MFG: Texas Instruments (VA)

Package Cooled: TSSOP14

D/C: 06+

Description: IC INV SW VOLT REG 500MA 14TSSOP

Attentive hint

Want to post a buying lead? If you are not a member yet, please select the specific/related part number first and then fill the quantity and your contact details in the "Request for Quotation Form" on the left, and then click "Send RFQ".Your buying lead can then be posted, and the reliable suppliers will quote via our online message system or other channels soon.

How to buy ?

How long will receive a response.

Top Sellers:

TOP

TL497ACPWR Parameters

Technical/Catalog Information	TL497ACPWR
Vendor	Texas Instruments (VA)
Category	Integrated Circuits (ICs)
Type	Step-Down (Buck), Step-Up (Boost), Inverting
Number of Outputs	1
Voltage - Input	4.5 ~ 12 V
Voltage - Output	-25 ~ 30 V
Current - Output	500mA
Power - Output	-
Package / Case	14-TSSOP
Packaging	Cut Tape (CT)
Internal Switch(s)	Yes
Synchronous	No
Rds (On)	-
Operating Temperature	0°C ~ 70°C
Frequency - Switching	-
Drawing Number	296; 4040064; PW; 8, 14, 16, 20, 24, 28
Lead Free Status	Lead Free
RoHS Status	RoHS Compliant
Other Names	TL497ACPWR TL497ACPWR 296 23298 1 ND 296232981ND 296-23298-1

TL497AI General Description

The TL497AC and TL497AI incorporate on a single monolithic chip all the active functions required in the construction of switching voltage regulators. They can also be used as the control element to drive external components for high-power-output applications. The TL497AC and TL497AI were designed for ease of use in step-up, step-down, or voltage inversion applications requiring high efficiency.

The TL497AC and TL497AI are fixed-on-time variable-frequency switching-voltage-regulator control circuits. The switch-on time is programmed by a single external capacitor connected between FREQ CONTROL and GND. This capacitor, C_T, is charged by an internal constant-current generator to a predetermined threshold. The charging current and the threshold vary proportionally with V_CC. Thus, the switch-on time remains constant over the specified range of input voltage (4.5 V to 12 V). Typical on times for various values of C_Tare as follows:

The output voltage is controlled by an external resistor ladder network (R1 and R2 in Figures 1, 2, and 3) that provides a feedback voltage to the comparator input. This feedback voltage is compared to the reference voltage of 1.2 V (relative to SUBSTRATE) by the high-gain comparator. When the output voltage decays below the value required to maintain 1.2 V at the comparator input, the comparator enables the oscillator circuit, which charges and discharges C_T as described above. The internal pass transistor is driven on during the charging of C_T. The internal transistor may be used directly for switching currents up to 500 mA. Its collector and emitter are uncommitted, and it is current driven to allow operation from the positive supply voltage or ground. An internal Schottky diode matched to the current characteristics of the internal transistor is also available for blocking or commutating purposes. The TL497AC and TL497AI also have on-chip current-limit circuitry that senses the peak currents in the switching regulator and protects the inductor against saturation and the pass transistor against overstress. The current limit is adjustable and is programmed by a single sense resistor, R_CL, connected between V_CC and CUR LIM SENS. The current-limit circuitry is activated when 0.7 V is developed across R_CL. External gating is provided by the INHIBIT input. When the INHIBIT input is high, the output is turned off.

Simplicity of design is a primary feature of the TL497AC and TL497AI. With only six external components (three resistors, two capacitors, and one inductor), the TL497AC and TL497AI operates in numerous voltage conversion applications (step-up, step-down, invert) with as much as 85% of the source power delivered to the load. The TL497AC and TL497AI replace the TL497 in all applications. The TL497AC is characterized for operation from 0°C to 70°C, and the TL497AI is characterized for operation from 40°C to 85°C.

TL497AI Maximum Ratings

Supply voltage, V_CC (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 V
Output voltage, V_O . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . .35 V
Input voltage, V_I(COMP INPUT) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . 5 V
Input voltage, V_I (INHIBIT) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 V
Diode reverse voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .35 V
Power switch current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . .750 mA
Diode forward current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .750 mA
Continuous total power dissipation . . . . . . . . . . . . . . . . . . . . . . . .. .See Dissipation Rating Table
Operating free-air temperature range, T_A:TL497AC . . . . . . . . . . . . . . . . . . . . . . . . .0°C to 70°C
TL497AI . . . . . . . . . . . . . . . . . . . . . . .40°C to 85°C
Storage temperature range, T_stg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . 65°C to 150°C
Lead temperature 1,6 mm (1/16 inch) from case for 60 seconds . . . . . . . . . . . . . . . . . . . .260°C

TL497AI Connection Diagram

Hotspot Suppliers Product

Product List A B C D E F G H I J K L M N O P Q R S T U V W X Y Z 0 1 2 3 4 5 6 7 8 9

MT58L64L18CT-10

Price: 4-6 USD

MT58L64L18CT-10 TQFP100
DL-7140-211M

Price: 5-6.5 USD

DL-7140-211M laser tube
74LVC74APG

Price: 4-5 USD

74LVC74APG - IC FLIP FLOP D-Type POS-EDG DUAL 14TSSOP
CY28346ZI-2

Price: 6.5-8 USD

CYPRESS - Clock Synthesizer with Differential CPU Outputs
PI5V330QEX

Price: 0.284-0.286 USD

PI5V330QEX Pericom Multiplexer Switch ICs
BSM300GA120DN2

Price: 1-2 USD

IGBT power module, Single switch, 1200 V, Collector-emitter voltage, 430A
SVA150XG04TB

Price: 1-2 USD

a-Si TFT-LCD, NEC, 228.096Hmm, 560V
PC354N1

Price: 0.124-0.2 USD

PC354N1T - Mini-flat Package, AC Input Type Photocoupler - Sharp Electrionic Components
RL1210JR-070R22L

Price: 0.177-0.178 USD

RL1210JR51-XX-BL - Thick Film Chip Resistor Low Ohmic - TAITRON Components Incorporated
STPS140A

Price: 0.053-0.055 USD

STPS140A - POWER SCHOTTKY RECTIFIER - STMicroelectronics
STA013

Price: 1.45-1.5 USD

STA013 - MPEG 2.5 LAYER III AUDIO DECODER - STMicroelectronics
SMBJ5347B

Price: 0.073-0.075 USD

SMBJ5347B - 5 Watt Surface Mount Silicon Zener Diodes - Micro Commercial Components