Datasheet > VT232TF

VT232TF

更新时间： 2024-11-24 12:56:43

品牌	Logo	应用领域
美信 - MAXIM		开关
页数	文件大小	规格书
27页	1150K
描述
INTEGRATED, STEP-DOWN SWITCHING REGULATOR WITH CCM OPERATION

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VT232TF 数据手册

NEW PRODUCT

VT263

Revised 10/3/11

INTEGRATED, STEP-DOWN SWITCHING REGULATOR

WITH CCM OPERATION

KEY FEATURES

Device

Type

Current

Rating

Input

Voltage

Output

Voltage

•

Small Footprint

Low-Profile Solution: 1.4mm to 4mm Maximum Height

High-Efficiency Solution: Greater Than 95% Peak

Efficiency

VT263

40A (CCM)

6.5V to 14.0V 0.7V to 5.5V

•

CCM Operation

Fast Transient Response: Supports up to 300A/s

Load Step Transients

Minimum Input and Output Capacitance Using Only

MLCC Capacitors

No External Frequency Compensation Required.

High-Frequency Operation: Greater Than 1MHz

GENERAL DESCRIPTION

The VT263 is a member of Volterra's fifth generation of

fully-integrated, highly efficient switching regulators for

applications operating from 6.5V to 14.0V and requiring up

to 40A maximum load. This single-chip regulator provides

an extremely compact, fast and accurate power delivery

solution for low-output voltage applications. The VT263's

Continuous Current Mode (CCM) operation down to light

load provides best possible load regulation, ripple and out-

put voltage headroom performance. Two internal low drop-

•

ADDITIONAL FEATURES

•

Two AC Droop Options

Two I

Options

MAX

out (LDO) regulators power the IC's analog (A

), logic

VDD

•

Supports Differential Remote Sense

Programmable Soft Start

Cycle-by-Cycle Current Limiting

Output Short Circuit Protection

Undervoltage and Overvoltage Lockout

Power Good Indicator

Thermal Shutdown

Programmable Peak-to-Peak Current Ripple

Internal 3.3V LDO Analog Supplies A

and gate drive sections (V ). The proprietary architecture

maintains tight voltage regulation.

This regulator allows designers to program soft start and

switching frequency/inductor ripple current. The program-

mable features can be used to make trade-offs between the

voltage regulators' performance and cost.

VDD

•

Internal 3.3V LDO Logic and Gate Drive Supply V

APPLICATIONS

•

DC-DC Converters Modules and On-Board, Point-of-

Load Voltage Regulators

•

Networking and Communication Equipment

Storage, Servers and Workstations

Industrial Equipment

BASIC APPLICATION CIRCUIT

TYPICAL EFFICIENCY VS LOAD CURRENT

98%

12V

96%

94%

92%

90%

88%

86%

V_CC

A_VDD

V_DDH

C_VCC

22µF

L_OUT

BST

C_AVDD

0.47µF

C_BST

20k

STAT

I_RIPL

Rsw

110nH

V_SENSE

V_DES

GND

R_RIPL

36.5K

C_OUT

R_RSW

BIAS

= 5V, 700kHz, 210nH

= 3.3V, 700kHz, 210nH

= 2.5V, 700kHz, 210nH

= 1.8V, 700kHz, 110nH

= 1.5V, 650kHz, 110nH

= 1.2V, 600kHz, 110nH

= 1.0V, 600kHz, 110nH

= 0.7V, 500kHz, 110nH

OUT

R_BIAS

48.7K

OUT

RSEL

A_GND

84%

82%

80%

78%

OUT

R_DES

48.7K

OUT

C_DES

22nF

OUT

R_SEL

OUT

R_f

10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42

Enable (3.3V)

(A)

OUT

Figure 1: Basic Application Circuit

Figure 2: System Efficiency vs. Output Load (V = 12V)

Proprietary. Do Not Copy. Do Not Distribute.

Volterra Semiconductor Corp.

12 3 4 5 6 7...27

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