RS2596 [ORISTER]

150KHz, 3A PWM Buck DC/DC Converter; 为150KHz ， 3A PWM降压型DC / DC转换器


型号：	RS2596
厂家：	ORISTER CORPORATION
描述：	150KHz, 3A PWM Buck DC/DC Converter 为150KHz ， 3A PWM降压型DC / DC转换器转换器
文件：	总8页 (文件大小：341K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

Page No. : 1/1

RS2596 Series

RS2596

150KHz, 3A PWM Buck DC/DC Converter

Description

The RS2596 is Monolithic IC that design for a step-down DC/DC Converter, and own

the ability of driving a 3A load without additional transistor component. The output

version included 3.3V, 5V, 12V and an adjustable type. It operates at a switching

frequency of 150KHz thus allowing smaller sized filter components than what would

be needed with lower frequency switching regulators. Other features include a

guaranteed ±4% tolerance on output voltage under specified input voltage and

output load conditions, and ±15% on the oscillator frequency. Regarding protected

function, thermal shutdown is to prevent over temperature operating from damage,

and current limit is against over current operating of the output switch.

2 3 4 5

Features

• 3.3V, 5V, 12V and adjustable

• Adjustable version output voltage range: 1.4-37V

• ±4% max over line and load conditions

• 150KHz ±15% fixed switching frequency

• TTL shutdown capability

• Operating voltage can be up to 40V

• Output load current: 3A

1 2 3 4 5

• TO220-5L and TO263-5L packages

• Low power standby mode

• Thermal-shuntdown and current-limit protection

• High efficiency

• Built-in switching a transistor on chip, requires only 4 external components

Applications

• Simple High-efficiency step-down regulator

• Positive to negative converter

• On-card switching regulators

Connection Diagrams

TO220-5L

Pins 1,3,5

TO263-5L

Pins 2,4

Side

View

Side

View

5 - On/Off

4 - Feed Back

3 - Ground

2 - Output

1 - VIN

5 - On/Off

4 - Feed Back

3 - Ground

2 - Output

1 - VIN

Top

View

Top

View

Metal Tab GND

DS-RS2596-04 Oct, 2007

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Page No. : 2/2

Pin Connections

VIN

Current

Source

Bias

1.235V

Reference

2.5V

Regulator

Start

200mV

220mV

COMP

Current

Limit

COMP

AMP

Switch

COMP

Driver

Output

GND

R1=2.5K

150KHz

OSC.

Thermal

Limit

COMP

(Note1)

Absolute Maxium Rating

Parameter

Supply Voltage

Symbol

V_CC

V_SD

V_FB

Value

Unit

On/Off Pin Input Voltage

Feedback Pin Voltage

Output Voltage to Ground

Power Dissipation

-0.3~+25

-1

V_OUT

P_D

Internally Limited

0~+70

^oC

Operating Temperature

Storage Temperature

T_opr

T_stg

-65~+150

-40~+125

+4.5~+40

Operating Junction Temperature Range

Operating Voltage

T_J

V_OP

Electrical Characteristics (Continued)

Specifications with boldface type apply over for full operating temperature range, the other type are for T_J=25^oC^{(Note 2)}

Typ.

(Note3) (Note4)

Max.

Part No.

Parameter

Symbol

Conditions

Min.

Unit

3.168

3.135

3.342

3.3

Output Voltage

Efficiency

V_OUT

4.75V≤V_IN≤40V, 0.2A≤I_LOAD≤3A

V_IN=12V, I_LOAD=3A

3.465

RS2596-3.3

5.0

4.800

4.750

5.200

5.250

Output Voltage

Efficiency

V_OUT

7V≤V_IN≤40V, 0.2A≤I_LOAD≤3A

V_IN=12V, I_LOAD=3A

RS2596-5.0

RS2596-12

11.52

11.40

12.48

12.60

Output Voltage

Efficiency

V_OUT

12.0

15V≤V_IN≤40V, 0.2A≤I_LOAD≤3A

V_IN=25V, I_LOAD=3A

1.267

8V≤V_IN≤40V, 0.2A≤I_LOAD≤3A

V_OUTprogrammed for 5V

V_IN=12V, V_OUT=5V, I_LOAD=3A

Reference Voltage

Efficiency

V_FB

1.193 1.230

1.280

RS2596-ADJ

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All Output Voltage Versions Electrical Characteristics

Specifications with boldface type apply over for full operating temperature range, the other type are for T_J=25^oC

(Unless otherwise specified, V_IN=12V for the 3.3V, 5V, and adjustable version and V_IN=24V for the 12V version, I_LOAD=500mA)

Parameter

Device Parameters

Symbol

Test Condition

Min.

Typ.

Max.

Unit

100

Feedback Bias Current

Oscillator Frequency

Saturation Voltage

I_b

f_O

Adjustable Version Only, V_FB=1.3V

150

1.3

KHz

127

110

173

(Note 5)

1.4

1.5

V_SAT

I_CL

I_OUT=3A ^{(Note 6,7)}

(Note 7)

(Note 8)

Max. Duty Cycle (ON)

Min. Duty Cycle (OFF)

100

5.5

6.5

Current Limit

Peak Current ^{(Note 6,7)}

3.6

4.5

Output Leakage Current

Quiescent Current

I_L

Output=0V ^{(Note 6,8)}

(Note 8)

I_Q

250

300

Standby Quiescent Current

I_STBY

ON/OFF pin=5V ^{(Note 9)}

150

TO220-5L

TO263-5L

TO220-5L

TO263-5L

2.5

3.5

Junction to

Case

^oC/W

θ_JC

Thermal Resistance

Junction to

ambient

^oC/W

(Note 10)

θ_JA

ON/OFF Control

V_IH

Low (Regulator ON)

0.6

ON/OFF Pin Logic Input Threshold

Voltage

1.3

V_IL

I_IH

I_IL

High (Regulator OFF)

2.0

V_LOGIC=2.5V (Regulator OFF)

V_LOGIC=0.5V (Regulator ON)

ON/OFF Pin Input Current

0.02

Note 1: Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Operating Ratings indicate conditions for which

the device is intended to be functional, but do not guarantee specific performance limits. For guaranteed specifications and test conditions,

see the Electrical Characteristics.

Note 2: External components such as the catch diode, inductor, input and output capacitors, and voltage programming resistors can affect

switching regulator system performance.

Note 3: Typical numbers are at 25^oC and represent the most likely norm.

Note 4: All limits guaranteed at room temperature (standard type face) and at temperature extremes (bold type face). All room temperature limits

are 100% production tested. All limits at temperature extremes are guaranteed via correlation using standard Statistical Quality Control

(SQC) methods. All limits are used to calculate Average Outgoing Quality Level (AOQL).

Note 5: The switching frequency is reduced when the second stage current limit is activated.

Note 6: No diode, inductor or capacitor connected to output pin.

Note 7: Feedback pin removed from output and connected to 0V to force the output transistor switch ON.

Note 8: Feedback pin removed from output and connected to 12V for the 3.3V, 5V, ADJ. version, and 15V for the 12V version, to force the output

transistor switch OFF.

Note 9: V_IN=40V.

Note 10: Junction to ambient thermal resistance. (With copper area of approximately 3in²)

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Page No. : 4/4

Characteristics Curve

Normalized Output Voltage

Shutdown Quiescent Current

160

140

120

100

1.5

V =12V

I_LOAD=200mA

0.5

V_ON/V_OFF=5V

T_J=25^oC

-0.5

-1

-1.5

100

125

150

175

Junction Temperature (^oC)

Supply Voltage (V)

Switch Current Limit

Switch Saturation Voltage

6.00

5.90

5.80

5.70

5.60

5.50

5.40

5.30

5.20

1.30

1.20

1.10

1.00

0.90

0.80

V =12V

T_J=25^oC

V =12V

V_OUT=5V

100

125

150

Junction Temperature (^oC)

Switch Current (A)

On/Off Pin Current (Sinking)

V =40V

T_J=25^oC

On/Off Pin Voltage (V)

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Page No. : 5/5

Typical Application Circuit

Fig.1 Fixed Type Circuit

Fig.2 Adjustable Output Voltage Versions

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Page No. : 6/6

TO-263-5L Dimension

DIM

Min.

9.9

15.20

4.50

8.20

0.05

5.10

2.44

Max.

10.30

#7.10

15.60

*1.70

4.70

*1.27

8.60

0.25

5.50

2.64

#7.00

#4.48

7^O

0^O

#: REF, *: Typical, Unit: mm

5-Lead TO-263

Plastic Package

Package Code: U

TO-220-5L Dimension

DIM

Min.

10.10

2.55

3.20

7.90

12.50

22.30

3.20

0.70

6.60

4.40

1.17

17.00

16.00

17.00

2.30

3.30

0.28

7.62

22.90

1.85

1.20

2.80

4.5^o

Max.

10.50

2.95

3.60

8.30

12.90

22.70

3.60

0.90

7.00

4.80

1.37

18.00

16.40

19.00

2.70

4.10

0.48

8.02

23.30

1.95

1.30

3.20

5.5^o

5-Lead TO-220

Plastic Package

Package Code: E

*: Typical, Unit: mm

Ordering Information

PART NUMBER

RS2596U-ADJ

RS2596U-3.3

RS2596U-5.0

RS2596U-12

PIN-PACKAGE

TO-263-5L

PART NUMBER

RS2596E-ADJ

RS2596E-3.3

RS2596E-5.0

RS2596E-12

PIN-PACKAGE

TO-220-5L

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Page No. : 7/7

Soldering Methods for Orister’s Products

1. Storage environment: Temperature=10^oC~35^oC Humidity=65%±15%

2. Reflow soldering of surface-mount devices

Figure 1: Temperature profile

Critical Zone

to T

Ramp-up

Tsmax

Tsmin

Preheat

Ramp-down

t 25^oC to Peak

Time

Profile Feature

Average ramp-up rate (T_Lto T_P)

Preheat

Sn-Pb Eutectic Assembly

Pb-Free Assembly

<3^oC/sec

- Temperature Min (Ts_min

)

100^oC

150^oC

200^oC

- Temperature Max (Ts_max

- Time (min to max) (ts)

Tsmax to T_L

)

60~120 sec

60~180 sec

- Ramp-up Rate

<3^oC/sec

Time maintained above:

- Temperature (T_L)

- Time (t_L)

183^oC

217^oC

60~150 sec

240^oC +0/-5^oC

60~150 sec

260^oC +0/-5^oC

Peak Temperature (T_P)

Time within 5^oC of actual Peak

10~30 sec

20~40 sec

Temperature (t_P)

Ramp-down Rate

<6^oC/sec

Time 25^oC to Peak Temperature

<6 minutes

<8 minutes

3. Flow (wave) soldering (solder dipping)

Products

Pb devices.

Peak temperature

245^oC ±5^oC

260^oC +0/-5^oC

Dipping time

5sec ±1sec

Pb-Free devices.

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Important Notice:

• All rights are reserved. Reproduction in whole or in part is prohibited without the prior written approval of Orister Corporation.

• Orister Corporation reserves the right to make changes to its products without notice.

• Orister Corporation products are not warranted to be suitable for use in Life-Support Applications, or systems.

• Orister Corporation assumes no liability for any consequence of customer product design, infringement of patents, or application assistance.

DS-RS2596-04 Oct, 2007

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RS2596 [ORISTER]

相关型号：

RS2596-12

RS2596-12EG

RS2596-12EP

RS2596-12UG

RS2596-12UP

RS2596-3.3

RS2596-33EG

RS2596-33EP

RS2596-33UG

RS2596-33UP

RS2596-5.0

RS2596-50EG