MCP1602-ADJI/MF Microchip Technology, MCP1602-ADJI/MF Datasheet

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MCP1602-ADJI/MF

Manufacturer Part Number
MCP1602-ADJI/MF
Description
IC,SMPS CONTROLLER,VOLTAGE-MODE,LLCC,8PIN,PLASTIC
Manufacturer
Microchip Technology
Type
Step-Down (Buck)r
Datasheet

Specifications of MCP1602-ADJI/MF

Internal Switch(s)
Yes
Synchronous Rectifier
Yes
Number Of Outputs
1
Voltage - Output
0.8 ~ 4.5 V
Current - Output
500mA
Frequency - Switching
2MHz
Voltage - Input
2.7 ~ 5.5 V
Operating Temperature
-40°C ~ 85°C
Mounting Type
Surface Mount
Package / Case
8-DFN
Output Voltage
0.8 V to 4.5 V
Output Current
500 mA
Input Voltage
2.7 V to 5.5 V
Switching Frequency
2 MHz
Operating Temperature Range
- 40 C to + 85 C
Mounting Style
SMD/SMT
Duty Cycle (max)
90 %
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Power - Output
-
Lead Free Status / Rohs Status
Lead free / RoHS Compliant
Features
• Over 90% Typical Efficiency
• Output Current: Up To 500 mA
• Power-Good Output with 262 ms Delay
• Low Quiescent Current: 45 µA (typical)
• Low Shutdown Current: 0.05 µA (typical)
• Automatic PWM to PFM Mode Transition
• Adjustable Output Voltage:
• Fixed Output Voltage:
• 2.0 MHz Fixed-Frequency PWM (Heavy Load)
• Internally Compensated
• Undervoltage Lockout (UVLO)
• Overtemperture Protection
• Overcurrent Protection
• Space Saving Packages:
Applications
• Cellular Telephones
• Portable Computers
• Organizers / PDAs
• USB Powered Devices
• Digital Cameras
• Portable Equipment
• +5V or +3.3V Distributed Systems
Package Types
© 2007 Microchip Technology Inc.
- 0.8V to 4.5V
- 1.2V, 1.5V, 1.8V, 2.5V, and 3.3V
- 8-Lead MSOP
- 8-Lead 3x3 DFN
2.0 MHz, 500 mA Synchronous Buck Regulator
1 SHDN
2
3
4
V
PG
A
CC
GND
MSOP-8
V
OUT
P
/V
GND
V
L
FB
IN
X
8
7
6
5
with Power-Good
General Description
The MCP1602 is a high efficient, fully integrated
500 mA synchronous buck regulator with a power-
good monitor. The 2.7V to 5.5V input voltage range and
low quiescent current (45 µA, typical) makes the
MCP1602 ideally suited for applications powered from
1-cell Li-Ion or 2-cell/3-cell NiMH/NiCd batteries.
At heavy loads, the MCP1602 operates in the 2.0 MHz
fixed frequency PWM mode which provides a low
noise, low output ripple, small-size solution. When the
load is reduced to light levels, the MCP1602
automatically changes operation to a PFM mode to
minimize quiescent current draw from the battery. No
intervention is necessary for a smooth transition from
one mode to another. These two modes of operation
allow the MCP1602 to achieve the highest efficiency
over the entire operating current range.
The open-drain power-good feature of the MCP1602
monitors the output voltage and provides indication
when the output voltage is within 94% (typical) of the
regulation value. The typical 2% hystereses in the
power-good transition threshold as well as a
262 ms (typical) delay time ensures accurate power-
good signaling.
The MCP1602 is available in either the 8-pin DFN or
MSOP package. It is also available with either an
adjustable or fixed output voltage. The available fixed
output voltage options are 1.2V, 1.5V, 1.8V, 2.5V, and
3.3V.
Additional
overtemperature, and overcurrent protection.
SHDN
A
V
GND
PG
CC
protection
MCP1602
1
2
3
4
3x3 DFN-8
features
8
7
6
5
include:
DS22061A-page 1
P
L
V
V
X
GND
IN
OUT
/V
FB
UVLO,

Related parts for MCP1602-ADJI/MF

MCP1602-ADJI/MF Summary of contents

Page 1

... MCP1602 ideally suited for applications powered from 1-cell Li-Ion or 2-cell/3-cell NiMH/NiCd batteries. At heavy loads, the MCP1602 operates in the 2.0 MHz fixed frequency PWM mode which provides a low noise, low output ripple, small-size solution. When the ...

Page 2

... MCP1602 Typical Application Circuit V IN 2.7V to 4.5V 10Ω 4.7 µF 0.1 µF ON OFF DS22061A-page 2 4.7 µ GND GND 1 SHDN PG 3 MCP1602 R PULLUP OUT 1.5V @ 500 mA 4.7 µF Processor Reset © 2007 Microchip Technology Inc. ...

Page 3

... PWM Disable IPEAK PFM Switcher -ILPK S Q POFF NOFF Switch Drive R Q Logic and Timing PWM/PFM PWM/PFM Logic IPEAK IPEAK PWM -ILPK V REF PG Generator with Delay V OUT MCP1602 V REF ILIM PWM ILIM PFM I Limit GND PFM -I Limit PK V REF GND DS22061A-page 3 ...

Page 4

... MCP1602 1.0 ELECTRICAL CHARACTERISTICS Absolute Maximum Ratings † ......................................................................+6.0V IN GND All Other I/O .............................. (A - 0.3V GND ............................................. -0. GND Output Short Circuit Current..................................Continuous Power Dissipation (Note 6) ..........................Internally Limited Storage Temperature.................................... -65 Ambient Temp. with Power Applied................ -40 Operating Junction Temperature.................. -40 ESD Protection On All Pins: HBM.............................................................................. ...

Page 5

... V OUT /ΔT — 30 — ppm/°C TH — 165 — µs RPD 140 560 262 ms RPU 0.2 — — ≥ 2.7V and MCP1602 = 4.7 µ 4.7 µ range Conditions Note 5.5V 100 mA OUT +1.5V 100 mA to 500 mA, Note 1 I LOAD T = 10% to 90% ...

Page 6

... MCP1602 TEMPERATURE SPECIFICATIONS Electrical Specifications: Unless otherwise indicated, all limits are specified for: V Parameters Temperature Ranges Operating Junction Temperature Range Storage Temperature Range Maximum Junction Temperature Package Thermal Resistances Thermal Resistance, 8L-MSOP Thermal Resistance, 8L-3x3 DFN DS22061A-page 6 Sym Min Typ Max ...

Page 7

... FIGURE 2- 1.2V). OUT 100 V = 1.8V OUT 500 mA OUT 4.0 4.2 0.1 FIGURE 2- 1.8V). OUT MCP1602 (ADJ) = 1.8V 100 mA, OUT LOAD T = +90° -40°C A 3.05 3.4 3.75 4.1 4.45 4.8 5.15 5.5 Input Voltage (V) I vs. Input Voltage ...

Page 8

... MCP1602 Typical Performance Curves (Continued) Note: Unless otherwise indicated SHDN = 3.6V +25°C. Adjustable or fixed output voltage options can be used to generate the Typical Performance Characteristics. A 100.0 97 100 mA 95.0 OUT 92.5 90 500 mA OUT 87.5 85.0 4.2 4.4 4.6 4.8 5.0 Input Voltage (V) FIGURE 2-7: Efficiency vs ...

Page 9

... Input Voltage (V) FIGURE 2-16: Switching Frequency vs. Input Voltage. 0.7 0.6 P-Channel 0.5 0.4 N-Channel 0.3 0.2 -40 -25 - 110 125 Ambient Temperature (°C) FIGURE 2-17: Switch Resistance vs. Ambient Temperature. FIGURE 2-18: Heavy Load Switching Waveform. MCP1602 = 100 mA, LOAD DS22061A-page 9 ...

Page 10

... MCP1602 Typical Performance Curves (Continued) Note: Unless otherwise indicated SHDN = 3.6V +25°C. Adjustable or fixed output voltage options can be used to generate the Typical Performance Characteristics. A FIGURE 2-19: Light Load Switching Waveform. FIGURE 2-20: Output Voltage Load Step Response vs. Time. DS22061A-page 4.7 µ 4.7 µH, V (ADJ ...

Page 11

... Exposed Metal Pad (EP) ) For the DFN package, connect the Exposed Pad to to the A , with vias into the A GND GND ). See the the A plane will aid in heat removal from the GND GND package pin. For FB MCP1602 ) . GND GND plane. This connection to GND DS22061A-page 11 . ...

Page 12

... LIGHT LOAD, PFM MODE During light load conditions, the MCP1602 operates in a PFM mode. When the MCP1602 enters this mode, it begins to skip pulses to minimize unnecessary quiescent current draw by reducing the number of switching cycles per second. The typical quiescent current draw for this device is 45 µA. ...

Page 13

... Soft Start The output of the MCP1602 is controlled during start- up. This control allows for a very minimal amount of V overshoot during start-up from V OUT the UVLO voltage or SHDN being enabled. 4.5 Overtemperature Protection Overtemperature protection circuitry is integrated in the MCP1602. This circuitry monitors the device junction ...

Page 14

... A 4.7 µF input and output capacitor, a 4.7 µH inductor, and a small RC filter make up the entire external component selection for this application. No external voltage divider or compensation is necessary. In addition to the fixed 1.5V option, the MCP1602 is also available in 1.2V, 1.8V, 2.5V, or 3.3V fixed voltage options. 5.3 ...

Page 15

... This is an estimate assuming that most of the power lost is internal to the MCP1602. There is some percentage of power lost in the buck inductor, with very little loss in the input and output capacitors. Size WxLxH (mm) 5 ...

Page 16

... FIGURE 5-1: PCB High Current Path. DS22061A-page 16 components along the high current path should be placed as close as possible to the MCP1602 to minimize the loop area. The feedback resistors and feedback signal should be routed away from the switching node and this switching current loop. When possible ground planes and traces should be used to help shield the feedback signal and minimize noise and magnetic interference ...

Page 17

... MCP1602 787 kΩ R PULLUP Processor Reset V IN 4.7 µ GND GND SHDN MCP1602 R PULLUP V IN MCP1602 V OUT 1.5V @ 500 mA 4.7 µF Processor Reset V OUT 1.0V @ 500 mA R COMP 4.99 kΩ 4.7 µF C COMP OUT 1.2V @ 500 mA 4.7 µF Processor Reset DS22061A-page 17 ...

Page 18

... Part Number Code MCP1602-120I/MF CAAU MCP1602-150I/MF CAAV MCP1602-180I/MF CAAW MCP1602-250I/MF CAAY MCP1602-330I/MF CAAZ MCP1602-ADJI/MF CAAS Part Number Code MCP1602-120I/MF 160212 MCP1602-150I/MF 160215 MCP1602-180I/MF 160218 MCP1602-250I/MF 160225 MCP1602-330I/MF 160233 MCP1602-ADJI/MF 1602AJ : Example CAAU 0733 256 Example: 1602AJ 733256 © 2007 Microchip Technology Inc. ...

Page 19

... Units MILLIMETERS Dimension Limits MIN N e 0.65 BSC A 0.80 A1 0.00 A3 0.20 REF D 3.00 BSC E2 0.00 E 3.00 BSC D2 0.00 b 0.25 L 0.20 K 0.20 MCP1602 NOTE BOTTOM VIEW NOM MAX 8 0.90 1.00 0.02 0.05 – 1.60 – 2.40 0.30 0.35 0.30 0.55 – – ...

Page 20

... MCP1602 8-Lead Plastic Micro Small Outline Package (MS) [MSOP] Note: For the most current package drawings, please see the Microchip Packaging Specification located at http://www.microchip.com/packaging D N NOTE Number of Pins Pitch Overall Height Molded Package Thickness Standoff Overall Width Molded Package Width Overall Length ...

Page 21

... APPENDIX A: REVISION HISTORY Revision A (October 2007) • Original Release of this Document. © 2007 Microchip Technology Inc. MCP1602 DS22061A-page 21 ...

Page 22

... MCP1602 NOTES: DS22061A-page 22 © 2007 Microchip Technology Inc. ...

Page 23

... MCP1602-1802I/MS: 1.80V, 500 mA Buck g) MCP1602-2502I/MF: 2.50V, 500 mA Buck h) MCP1602-2502I/MS: 2.50V, 500 mA Buck i) MCP1602T-3302I/MF: Tape and Reel, j) MCP1602-3302I/MS: 3.30V, 500 mA Buck k) MCP1602-ADJI/MF: l) MCP1602-ADJI/MS: MCP1602 . Reg, 8LD DFN Pkg. Reg, 8LD MSOP Pkg. Reg, 8LD DFN Pkg. Reg, 8LD MSOP Pkg. Reg, 8LD DFN Pkg. ...

Page 24

... MCP1602 NOTES: DS22061A-page 24 © 2007 Microchip Technology Inc. ...

Page 25

... PowerInfo, PowerMate, PowerTool, REAL ICE, rfLAB, Select Mode, Smart Serial, SmartTel, Total Endurance, UNI/O, WiperLock and ZENA are trademarks of Microchip Technology Incorporated in the U.S.A. and other countries. SQTP is a service mark of Microchip Technology Incorporated in the U.S.A. All other trademarks mentioned herein are property of their respective companies. ...

Page 26

... Fax: 886-3-572-6459 Taiwan - Kaohsiung Tel: 886-7-536-4818 Fax: 886-7-536-4803 Taiwan - Taipei Tel: 886-2-2500-6610 Fax: 886-2-2508-0102 Thailand - Bangkok Tel: 66-2-694-1351 Fax: 66-2-694-1350 © 2007 Microchip Technology Inc. EUROPE Austria - Wels Tel: 43-7242-2244-39 Fax: 43-7242-2244-393 Denmark - Copenhagen Tel: 45-4450-2828 Fax: 45-4485-2829 France - Paris Tel: 33-1-69-53-63-20 ...

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