ISL9305IRTBCNLZ-T Intersil, ISL9305IRTBCNLZ-T Datasheet

ISL9305IRTBCNLZ-T

Manufacturer Part Number

ISL9305IRTBCNLZ-T

Description

IC PMIC 800MA 3MHZ 16TQFN

Manufacturer

Intersil

Datasheet

1.ISL9305IRTAANLZ-T.pdf (17 pages)

Specifications of ISL9305IRTBCNLZ-T

Topology

Step-Down (Buck) (2), Linear (LDO) (2)

Function

Any Function

Number Of Outputs

Frequency - Switching

3MHz

Voltage/current - Output 1

0.8 V ~ 5.5 V, 800mA

Voltage/current - Output 2

0.8 V ~ 5.5 V, 800mA

Voltage/current - Output 3

0.9 V ~ 3.3 V, 350mA

W/led Driver

W/supervisor

W/sequencer

Voltage - Supply

1.5 V ~ 5.5 V

Operating Temperature

-40°C ~ 85°C

Mounting Type

Package / Case

Lead Free Status / RoHS Status

Lead free / RoHS Compliant

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3MHz Dual Step-Down Converters and Dual Low-Input

LDOs with I

ISL9305

The ISL9305 is an integrated mini Power Management IC

(mini-PMIC) ideal for applications of powering low-voltage

microprocessor or multiple voltage rails with battery as input

sources, such as a single Li-ion or Li-Polymer. ISL9305

integrates two high-efficiency 3MHz synchronous step-down

converters (DCD1 and DCD2) and two low-input, low-dropout

linear regulators (LDO1 and LDO2).

The 3MHz PWM switching frequency allows the use of very

small external inductors and capacitors. Both step-down

converters can enter skip mode under light load conditions to

further improve the efficiency and maximize the battery life.

For noise sensitive applications, they can also be programmed

through I

regardless of the load current condition. The I

supports on-the-fly slew rate control of the output voltage from

0.825V to 3.6V at 25mV/step size for dynamic power saving.

Each step-down converter can supply up to 800mA load

current. The default output voltage can be set from 0.8V to V

using external feedback resistors on the adjustable version, or

the ISL9305 can be ordered in factory pre-set power-up default

voltages in increments of 100mV from 0.9V to 3.6V.

The ISL9305 also provides two 300mA low dropout (LDO)

regulators. The input voltage range is 1.5V to 5.5V allowing

them to be powered from one of the on-chip step-down

converters or directly from the battery. The default LDO

power-up output comes with factory pre-set fixed output

voltage options between 0.9V to 3.3V.

The ISL9305 is available in a 4mmx4mm 16 Ld TQFN

package.

Related Literature

• FN7724, ISL9305H Data Sheet

•

November 8, 2010

FN7605.0

AN1564

Evaluation Boards”

C interface to operate in forced PWM mode

“ISL9305IRTZEVAL1Z and ISL9305HIRTZEVAL1Z

C Compatible Interface

1.5V TO 5.5V

2.3V TO 5.5V

10µF

1µF

*Only for adjustable output version. For fixed output version, directly

connect the FB pin to the output of the buck converter.

FIGURE 1. TYPICAL APPLICATION DIAGRAM

C interface

GNDDCD1

VINDCD1

VINDCD2

SDAT

SCLK

VINLDO1

VINLDO2

CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.

ISL9305

GNDDCD2

1-888-INTERSIL or 1-888-468-3774

Intersil (and design) is a trademark owned by Intersil Corporation or one of its subsidiaries.

VOLDO1

VOLDO2

GNDLDO

SW1

SW2

FB1

FB2

Features

• Dual 800mA, Synchronous Step-down Converters and Dual

• Input Voltage Range

• 400kb/s I

• Adjustable Output Voltage

• At 25mV/step . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.825V to 3.6V

• LDO1/LDO2 Output Voltage I

• 50μA I

• On-the-fly I

• DCD1/DCD2 I

• Small, Thin, 4mmx4mm TQFN Package

Applications

• Cellular Phones, Smart Phones

• PDAs, Portable Media Players, Portable Instruments

• Single Li-ion/Li-Polymer Battery-Powered Equipment

• DSP Core Power

300mA, General-purpose LDOs

- DCD1/DCD2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.3V to 5.5V

- LDO1/LDO2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.5V to 5.5V

Between the Host Controller and the ISL9305

- DCD1/DCD2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.8V to V

- Fixed Output I

- At 50mV/step. . . . . . . . . . . . . . . . . . . . . . . . . . . 0.9V to 3.3V

for each Enabled LDO

Voltages

Load or Forced Fixed Switching Frequency PWM Mode

All other trademarks mentioned are the property of their respective owners.

= 1.5µH

1µF

(Typ) with DCD1/DCD2 in Skip Mode; 20μA I

C-bus Series Interface Transfers the Control Data

C Programming of DC/DC and LDO Output

C Programmable Skip Mode Under Light

C Programmability

1µF

4.7µF

800mA

300mA

C Programmability

(Typ)

Related parts for ISL9305IRTBCNLZ-T

ISL9305IRTBCNLZ-T Summary of contents

Page 1

... FIGURE 1. TYPICAL APPLICATION DIAGRAM CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures. 1-888-INTERSIL or 1-888-468-3774 Intersil (and design trademark owned by Intersil Corporation or one of its subsidiaries. All other trademarks mentioned are the property of their respective owners. C-bus Series Interface Transfers the Control Data ...

Page 2

PARTS DESCRIPTION MANUFACTURER L1, L2 Inductor Sumida C1 Input capacitor Murata C2, C3 Input capacitor Murata C4, C5 Output capacitor Murata C6, C7 Output capacitor Murata R1, R2, Resistor Various R3, R4 NOTE and C5 are 10µF/6.3V for ...

Page 3

Pin Configuration Pin Descriptions PIN NUMBER (TQFN) NAME 1 VINDCD1 Input voltage for buck converter DCD1 and it also serves as the power supply pin for the whole internal digital/ analog circuits. 2 FB1 Feedback pin for DCD1, connect external ...

Page 4

... Ordering Information PART NUMBER (Notes PART MARKING ISL9305IRTAANLZ-T 9305I AANLZ ISL9305IRTBCNLZ-T 9305I BCNLZ ISL9305IRTBFNCZ-T 9305I BFNCZ ISL9305IRTWBNLZ-T 9305I WBNLZ ISL9305IRTWCLBZ-T 9305I WCLBZ ISL9305IRTWCNLZ-T 9305I WCNLZ ISL9305IRTWCNYZ-T 9305I WCNYZ ISL9305IRTWLNCZ-T 9305I WLNCZ ISL9305IRTZEVAL1Z Evaluation Board NOTES: 1. Please refer to TB347 for details on reel specifications. ...

Page 5

... Maximum Junction Temperature Range . . . . . . . . . . . . . .-40°C to +150°C Recommended Junction Temperature Range . . . . . . . . .-40°C to +125°C Storage Temperature Range .-65°C to +150°C Pb-free reflow profile . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . see link below http://www.intersil.com/pbfree/Pb-FreeReflow.asp Recommended Operating Conditions VINDCD1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.3V to 5.5V VINDCD2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.3V to VINDCD1 VINLDO1 and VINLDO2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.5V to VINDCD1 DCD1 and DCD2 Output Current ...

Page 6

Electrical Specifications Unless otherwise noted, all parameter limits are guaranteed over the recommended operating conditions and the typical specifications are measured at the following conditions: T VINLDOx = VOLDOx + 0.5V to 5.5V with VINLDOx always no higher than VINDCD1, ...

Page 7

Theory of Operation DCD1 and DCD2 Introduction Both the DCD1 and DCD2 converters on ISL9305 use the peak-current-mode pulse-width modulation (PWM) control scheme for fast transient response and pulse-by-pulse current limiting. Both converters are able to supply up to 800mA ...

Page 8

Soft-Start The soft-start reduces the in-rush current during the start-up stage. The soft-start block limits the current rising speed so that the output voltage rises in a controlled fashion. Overcurrent Protection The overcurrent protection for DCD1 and DCD2 is provided ...

Page 9

FIGURE 4. EXPOSED THERMAL PAD Compatible Interface 2 The ISL9305 offers compatible interface, using two pins: SCLK for the serial clock and SDAT for serial data respectively. 2 According to the I C specifications, ...

Page 10

S SLAVE ADDRESS 1 A R/W A – ACKNOWLEDGE SYSTEM HOST N – NOT ACKNOWLEDGE S – START ISL9305 P – STOP Control Registers All the registers are reset at initial start-up. DCD OUTPUT VOLTAGE CONTROL REGISTER ...

Page 11

DCD OUTPUT DCDOUT VOLTAGE DCDOUT <7:0> (V) <7:0> 00 0.825 01 0.850 02 0.875 03 0.900 04 0.925 05 0.950 06 0.975 07 1.000 08 1.025 09 1.050 0A 1.075 0B 1.100 0C 1.125 0D 1.150 0E 1.175 0F 1.200 ...

Page 12

LDOOUT LDO OUTPUT LDOOUT <7:0> VOLTAGE (V) 00 0.90 01 0.95 02 1.00 03 1.05 04 1.10 05 1.15 06 1.20 07 1.25 08 1.30 09 1.35 0A 1.40 0B 1.45 0C 1.50 0D 1.55 0E 1.60 0F 1.65 DCD1 ...

Page 13

DCD OUTPUT VOLTAGE SLEW RATE CONTROL REGISTER DCD_SRCTL, address 0x06h TABLE 8. BIT NAME ACCESS RESET B7 DCD2SR_2 R/W 0 DCD2 Slew Rate Setting, DCD2SR[2:0]: B6 DCD2SR_1 R/W 0 000 to 0.225mV/µs 001 to 0.45mV/µs B5 DCD2SR_0 R/W 1 010 ...

Page 14

Typical Operating Conditions VODCD1 (100mV/DIV VODCD2 (10mV/DIV) IOUT_VODCD1 (500mA/DIV FIGURE 11. DCD OUTPUT TRANSIENT RESPONSE (V STEP: 80mA to 800mA) VODCD2 (1V/DIV) VOLDO2 (2V/DIV) FIGURE 13. START-UP SEQUENCY (V 1.83 1.82 1.81 1. 5. ...

Page 15

OUTPUT CURRENT (mA) FIGURE 17. EFFICIENCY vs OUTPUT CURRENT (V PWM MODE PSRR 30 ...

Page 16

... Accordingly, the reader is cautioned to verify that data sheets are current before placing orders. Information furnished by Intersil is believed to be accurate and reliable. However, no responsibility is assumed by Intersil or its subsidiaries for its use; nor for any infringements of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of Intersil or its subsidiaries. ...

Page 17

Package Outline Drawing L16.4x4G 16 LEAD THIN QUAD FLAT NO-LEAD PLASTIC PACKAGE Rev 0, 4/10 4.00 6 PIN 1 INDEX AREA (4X) 0.15 TOP VIEW ( TYP ) ( TYPICAL RECOMMENDED LAND PATTERN ...

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