SP6652ER-L Exar Corporation, SP6652ER-L Datasheet

SP6652ER-L

Manufacturer Part Number

SP6652ER-L

Description

IC PWM BUCK CURRENT MODE 10DFN

Manufacturer

Exar Corporation

Type

Step-Down (Buck)r

Datasheet

1.SP6652ER-L.pdf (16 pages)

Specifications of SP6652ER-L

Package / Case

10-VFDFN Exposed Pad

Internal Switch(s)

Yes

Synchronous Rectifier

Yes

Number Of Outputs

Voltage - Output

0.9 V ~ 5 V

Current - Output

Frequency - Switching

1.4MHz

Voltage - Input

2.85 V ~ 5.5 V

Operating Temperature

-40°C ~ 85°C

Mounting Type

Output Voltage

Adjustable

Output Current

1 A

Input Voltage

2.85 V to 5.5 V

Mounting Style

SMD/SMT

Duty Cycle (max)

100 %

Lead Free Status / RoHS Status

Lead free / RoHS Compliant

Lead Free Status / RoHS Status

Lead free / RoHS Compliant, Lead free / RoHS Compliant

Other names

1016-1216

Available stocks

Company

Part Number

Manufacturer

Quantity

Price

Company:

Bonase Electronics (HK) Co., Limited

Part Number:

SP6652ER-L/TR

Manufacturer:

EXAR

Quantity:

2 000

Current page: 1 of 16
Download datasheet (942Kb)

The SP6652 is a high efficiency, synchronous buck regulator ideal for portable applications

using one Li-Ion cell, with up to 1A of output current. The 1.4MHz switching frequency and

PWM control loop are optimized for a small value inductor and ceramic output capacitor,

for space constrained portable designs. In addition, the input voltage range of 2.7V to 5.5V;

excellent transient response, output accuracy, and ability to transition into 100% duty cycle

operation -- further extending useful battery life -- make the SP6652 a superior choice for

a wide range of portable power applications. A logic level shutdown control, external clock

synchronization, and forced-PWM or automatic control inputs are provided. Other features

include soft-start, over current protection and 140ºC over-temperature shutdown.

Oct10-07 RevJ

Features

■ 1A Output Current

■ 1.4MHz Constant Frequency Operation

■ 97% Efficiency Possible

■ 0.5µA (Max.) Shutdown Current

■ Adjustable Output Voltage

■ No External FETs or Schottky Diode Required

■ Uses Small Value Inductors and Ceramic

■ Low Dropout Operation: 100% Duty Cycle

■ Soft Start and Thermal Shutdown Protection

■ Easy Frequency Synchonization

■ Lead Free, RoHS Compliant package: l

Output Capacitors

Small (3mm X 3mm) 10 Pin DFN or MSOP

3.3V at 1A

OUT

10µF

Solved by

Current Mode PWM Buck Regulator

1A, High Efficiency, Fixed 1.4 MHz

340kΩ

100kΩ

SP6652 1A, High Efficiency, Current Mode PWM Buck Regulator

SHUTDOWN

ENABLE

10nF

4kΩ

4.7µH

COMP

GND

SP6652

COMP

applications

■ Mobile Phones

■ PDAs

■ DSCs

■ MP3 Players

■ USB Devices

■ Point of Use Power

GND

typical application circuit

MODE

SYNC

VIN

10 Pin DFN

SP6652

10Ω

1µF

3.6V - 5.5V

sp6652

Description

10µF

SYNC

MODE

VIN

Related parts for SP6652ER-L

SP6652ER-L Summary of contents

Page 1

Solved by TM 1A, High Efficiency, Fixed 1.4 MHz Current Mode PWM Buck Regulator Features ■ 1A Output Current ■ 1.4MHz Constant Frequency Operation ■ 97% Efficiency Possible ■ 0.5µA (Max.) Shutdown Current ■ Adjustable Output Voltage ■ No External ...

Page 2

PV ...........................................................................-0. VIN to S .....................................................................-0.3V to 0.3V P GND GND .............................................................. - 0. GND Storage Temperature ....................................................-65 °C to 150 °C Operating Temperature .................................................. -40°C to +85° ...

Page 3

Pin pin Number NAME Power Ground Pin. Synchronous rectifier current returns through GND P this pin. Internal Ground Pin. Control circuitry returns current to this pin. GND S External feedback network input connection. Connect a resistor from 3 ...

Page 4

Page 5

Current Mode Control and Slope Compensation The SP6652 is designed to use low value ceramic capacitors and low value inductors to reduce the converter’s volume and cost in portable devices. Current mode PWM control was, therefore, chosen for the ease ...

Page 6

The inductor current tends to rise until the energy loss from the discharge resistances are equal to the energy gained during the charge phase. For this reason, the clock frequency is cut in half ...

Page 7

The compensation capacitor becomes (2π•Rz•pole1) (6.28•10kΩ•4kHz) = 4nF Soft Start Soft-start is accomplished by disconnect- ing the error amp and inserting a constant 2μA current to charge the ...

Page 8

VOUT R FBH C3 10µF R FBL Complete Application Circuit. COMPONENT SELECTION The SP6652 PWM buck regulator circuit requires 3 capacitors: 10µF for the P 1µF input bypass for the S for the output are typically recommended. For the input ...

Page 9

Manufacturers/ Website TDK/www.tdk.com C1005X5R0J105M TDK/www.tdk.com C1608X5R0J475K TDK/www.tdk.com C2012X5R0J106M Murata/www.murata.com GRM155R60J105KE19B Murata/www.murata.com GRM188R60J475KE19 Murata/www.murata.com GRM21BR60J106KE19L Table 1. Capacitor Selection The range of typical inductor values and sizes are shown here in Table 2. Manufacturers/ Website Coilcraft/ www.coilcraft Coilcraft/ www.coilcraft Sumida/ www.sumida.com ...

Page 10

Bode plot) divided by the loop gain band- width, given as 20kHz, which is used in the following equation: Error Amp Gain / (loop gain bandwidth zero = 80kHz / ...

Page 11

SP6652 Efficiency vs Load Vout = 3.3V 100 ILoad (mA) Figure 5. Efficiency vs. Load, Vout= 3.3V SP6652 Line/Load Rejection Vout = 3.3V 3.40 3.35 3.30 3.25 3.20 ...

Page 12

Oct10-07 RevJ SP6652 1A, High Efficiency, Current Mode PWM Buck Regulator TYPICAL PERFORMANCE CHARACTERISTICS Figure 11. 0mA to 600mA Load Step Data Vin=4.2V, Vo=3.3V Rz=4kW, Cz=10nF, L1=4.7uH Figure 12. 0mA to 600mA Load Step Data Vo(AC) 200mV/div Vin=4.2V, Vo=1.5V Rz=2kW, ...

Page 13

Oct10-07 RevJ SP6652 1A, High Efficiency, Current Mode PWM Buck Regulator TYPICAL PERFORMANCE CHARACTERISTICS EN Vout Figure 14. SP6652 600mA Start-up from Enable Vin=4.2V, Vo=3.3V, Iout = 600mA, Rz=4kW, Cz=10nF, ILX L1=4.7uH 0.5A/div EN Figure 15. SP6652 600mA Vout Start-up ...

Page 14

Page 15

Page 16

... Part Number MSL Level SP6652ER 260ºC SP6652ER-L/ 260ºC SP6652EU-L/ 260ºC SP6652EU 260ºC SP6652ER L1 @ 240ºC SP6652ER/ 240ºC SP6652EU L1 @ 240ºC SP6652EU- 240ºC SP6652EU/ 240ºC Evaluation Boards Not Applicable to SP6652EB Board Not Applicable to SP6652LEDEB Board Note: The SP6652EB is for regular SP6652 users, the SP652LEDEB is for LED driver users ...

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