MAX1835EUT-T [ROCHESTER]

1 A SWITCHING REGULATOR, PDSO6, MO-178AB, SOT-23, 6 PIN;


型号：	MAX1835EUT-T
厂家：	Rochester Electronics
描述：	1 A SWITCHING REGULATOR, PDSO6, MO-178AB, SOT-23, 6 PIN 信息通信管理开关光电二极管
文件：	总15页 (文件大小：1141K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

19-1802; Rev 2; 4/05

High-Efficiency Step-Up Converters with

Reverse Battery Protection

General Description

Features

The MAX1832–MAX1835 are high-efficiency step-up

converters with complete reverse battery protection that

protects the device and the load when the battery is

reversed. They feature a built-in synchronous rectifier,

which allows for over 90% efficiency and reduces size

and cost by eliminating the need for an external

Schottky diode.

♦ Reverse Battery Protection for DC-DC Converter

and Load

♦ Up to 90% Efficiency

♦ No External Diode or FETs Needed

♦ Internal Synchronous Rectifier

♦ 4µA Quiescent Current

These step-up converters operate from a +1.5V to +5.5V

input voltage range and deliver up to 150mA of load cur-

rent. The MAX1833EUT/MAX1835EUT (SOT devices)

have a fixed 3.3V output voltage. The MAX1833ETT30

(TDFN device) has a fixed 3.0V output voltage. The

MAX1832/MAX1834 have adjustable outputs from +2V to

+5.5V. In shutdown, the MAX1832/MAX1833 connect the

battery input to the voltage output, allowing the input bat-

tery to be used as a backup or real-time clock supply

when the converter is off (see Selector Guide).

♦ <1µA Shutdown Supply Current

♦ +1.5V to +5.5V Input Voltage Range

♦ Accurate SHDN Threshold for Low-Battery Cutoff

♦ BATT Connected to OUT in Shutdown for Backup

Power (MAX1832/MAX1833)

♦ RST Output (MAX1833/MAX1835)

♦ Fixed 3.3V/3.0V Output Voltage

MAX183_EUT devices are available in a miniature 6-pin

SOT23 package. The MAX1833ETT30 is available in a

3mm ✕ 3mm thin DFN package. The MAX1832EVKIT is

available to speed designs.

♦ Adjustable Output Voltage (MAX1832/MAX1834)

♦ Up to 150mA Output Current

♦ Tiny 6-Pin SOT23 Package

♦ Tiny 6-Pin Thin QFN Package (MAX1833ETT30)

________________________Applications

Ordering Information

Medical Diagnostic Equipment

Pagers

Hand-Held Instruments

Remote Wireless Transmitters

Digital Cameras

Cordless Phones

Battery Backup

PC Cards

Local 3.3V or 5V Supply

PIN-

PACKAGE

TOP

MARK

PART

TEMP RANGE

MAX1832EUT-T

MAX1833EUT-T

-40°C to +85°C

6 SOT23-6

AAOT

AAOU

6 TDFN-6

(T633-1)

MAX1833ETT30-T

-40°C to +85°C

ABX

MAX1834EUT-T

MAX1835EUT-T

-40°C to +85°C

6 SOT23-6

AAOV

AAOW

Pin Configurations

Selector Guide

TOP VIEW

OUTPUT

VOLTAGE

OUTPUT VOLTAGE

IN SHUTDOWN

PART

SHDN

BATT

GND

FB (RST)

OUT

MAX1832EUT-T

MAX1833EUT-T

MAX1833ETT30-T

MAX1834EUT-T

MAX1835EUT-T

Adjustable

Fixed 3.3V

Fixed 3.0V

Adjustable

Fixed 3.3V

BATT

MAX1832

MAX1834

(MAX1833EUT)

(MAX1835)

MAX1833ETT

- 0.7V

BATT

SOT23

TDFN

3mm ✕ 3mm

________________________________________________________________ Maxim Integrated Products

For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at

1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.

High-Efficiency Step-Up Converters with

Reverse Battery Protection

ABSOLUTE MAXIMUM RATINGS

BATT, LX to GND.........................................................-6V to +6V

LX to OUT....................................................................-6V to +1V

SHDN to GND..............................................-6V to (V

OUT, FB, RST TO GND ............................................-0.3V to +6V

Operating Temperature Range ...........................-40°C to +85°C

Junction Temperature......................................................+150°C

Storage Temperature Range.............................-65°C to +150°C

Lead Temperature (soldering, 10s) ................................+300°C

+ 0.3V)

OUT

LX Current................................................................................1A

Continuous Power Dissipation (T = +70°C)

6-Pin SOT23 (derate 9.1mW/°C above +70°C) ...........727mW

6-Pin 3mm ✕ 3mm TDFN (derate 18.2mW/°C

above +70°C) .........................................................1454.5mW

Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional

operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to

absolute maximum rating conditions for extended periods may affect device reliability.

ELECTRICAL CHARACTERISTICS

= +1.5V, V

= +3.3V, V = +2V, GND = 0, T = -40°C to +85°C. Typical values are at T = +25°C, unless otherwise

BATT A A

SHDN

OUT

noted.) (Note 1)

PARAMETER

Output Range

SYMBOL

CONDITIONS

MAX1832/MAX1834

MIN

2.0

TYP

MAX

5.5

UNITS

OUT

Battery Input Range

1.5

5.5

BATT

T = +25°C

1.22

1.24

1.5

Startup Battery Input Voltage

LOAD

= 2.6kΩ

= -40°C to +85°C

T = +25°C

3.225

3.208

2.94

3.290

3.355

3.372

3.06

MAX1833EUT/

MAX1835EUT

= -40°C to +85°C

Output Voltage

OUT

T = +25°C

3.0

MAX1833ETT30

= -40°C to +85°C

2.925

1.208

1.204

3.075

1.248

1.252

T = +25°C

1.228

MAX1832/

MAX1834

FB Trip Voltage

= -40°C to +85°C

MAX1832/

MAX1834,

T = +25°C

3.5

4.0

0.4

FB Input Bias Current

T = -40°C to +85°C

= +1.3V

T = +25°C

1.2

1.5

1.3

1.6

= +3.3V

OUT

N-Channel On-Resistance

P-Channel On-Resistance

P-Channel Catch-Diode Voltage

Ω

NCH

= 100mA

T = -40°C to +85°C

T = +25°C

0.5

= +3.3V

OUT

PCH

= 100mA

T = -40°C to +85°C

= 100mA, PCH off, V

= +3.5V,

OUT

0.73

525

= +1.3V

T = +25°C

435

400

3.5

615

650

6.5

N-Channel Switch Current Limit

Switch Maximum On-Time

= +3.3V

µs

MAX

OUT

= -40°C to +85°C

T = +25°C

Synchronous Rectifier Zero-

Crossing Current

= +3.3V

= +3.5V,

OUT

= -40°C to +85°C

T = +25°C

2.5

7.0

8.0

Quiescent Current into OUT

(Note 2)

µA

= +1.3V

T = -40°C to +85°C

Shutdown Current into OUT

= +3.5V, V

= V = 0V

0.05

OUT

SHDN

_______________________________________________________________________________________

High-Efficiency Step-Up Converters with

Reverse Battery Protection

ELECTRICAL CHARACTERISTICS (continued)

= +1.5V, V

= +3.3V, V = +2V, GND = 0, T = -40°C to +85°C. Typical values are at T = +25°C, unless otherwise

BATT A A

SHDN

OUT

noted.) (Note 1)

PARAMETER

SYMBOL

CONDITIONS

= V = V = -3V

MIN

TYP

MAX

UNITS

Reverse Battery Current into

OUT

= 0, V

µA

OUT

BATT

SHDN

T = +25°C

1.8

5.0

6.0

= +3.5V,

= +1.3V

Quiescent Current into BATT

Shutdown Current into BATT

µA

T = -40°C to +85°C

= +3.5V, V

= +2V, V = 0

SHDN

0.001

0.002

OUT

BATT

Reverse Battery Current into

BATT

= 0, V

= V = V = -3V

SHDN LX

OUT

BATT

SHDN Logic Low

= +1.5V to +5.5V

0.3

BATT

T = +25°C

1.185

1.170

1.228

1.271

1.286

SHDN Threshold

Rising edge

= -40°C to +85°C

SHDN Threshold Hysteresis

SHDN Input Bias Current

0.02

= +5.5V, V

= +5.5V, T = +25°C

100

150

µA

OUT

SHDN

SHDN Reverse Battery Current

= 0, V

= V

= V = -3V

BATT

SHDN

MAX1833EUT/

MAX1835EUT,

falling edge

T = +25°C

2.830

2.800

2.980

2.717

3.110

3.140

= -40°C to +85°C

RST Threshold

T = +25°C

2.580

2.553

2.836

2.863

0.2

MAX1833ETT30

= -40°C to +85°C

RST Voltage Low

= 1mA, V

= +2.5V

OUT

RST

T = +25°C

0.1

100

RST Leakage Current

= +5.5V

RST

T = -40°C to +85°C

T = +25°C

100

LX Leakage Current

= +5.5V

T = -40°C to +85°C

100

0.001

150

LX Reverse Battery Current

Maximum Load Current

Efficiency

= 0, V

= V

= V = -3V

µA

OUT

BATT

SHDN

= +2V, V

= +3.3V

LOAD

BATT

OUT

= +2V, V

= +3.3V, I

= 40mA

LOAD

Note 1: All units are 100% production tested at T =+25°C. Limits over the operating temperature range are guaranteed by design

and not production tested.

Note 2: Supply current into OUT. This current correlates directly to the actual battery-supply current, but is reduced in value accord-

ing to the step-up ratio and efficiency.

_______________________________________________________________________________________

High-Efficiency Step-Up Converters with

Reverse Battery Protection

Typical Operating Characteristics

= +3.3V, V

= +2V, unless otherwise noted.) (Figure 1)

OUT

BATT

EFFICIENCY vs. LOAD CURRENT

(V = 5.0V)

EFFICIENCY vs. LOAD CURRENT

(V = 3.3V)

EFFICIENCY vs. LOAD CURRENT

(V = 2.5V)

OUT

V = +2.0V

BATT

= +3.3V

BATT

= +2.7V

BATT

= +2.0V

BATT

= +2.7V

BATT

= +1.5V

BATT

= V

BATT

SHDN

BATT

= +1.5V

R1 = 100kΩ

= V

BATT

SHDN

R2 = 100kΩ

R1 = 309Ω

R2 = 100kΩ

MAX1834

= +1.5V

BATT

= 20µF

OUT

= V

BATT

SHDN

MAX1835

MAX1834

0.1

(mA)

100

1000

0.1

(mA)

100

1000

0.1

100

LOAD

(mA)

LOAD

INPUT CURRENT AND OUTPUT VOLTAGE

vs. BATTERY VOLTAGE (SHUTDOWN, NO LOAD)

MAXIMUM OUTPUT CURRENT

vs. BATTERY VOLTAGE

STARTUP BATTERY VOLTAGE

vs. LOAD RESISTANCE

MAX1832/35 toc06

1.7

1.6

1.5

1.4

1.3

1.2

1.0

0.8

0.6

0.4

0.2

250

200

150

100

= V

= 0

= ∞

SHDN

BATT

SHDN

LOAD

OUT

= +2.5V

MAX1833

= +3.3V

= +5.0V

OUT

= +5.0V

OUT

BATT

OUT

= +3.3V

OUT

= +2.5V

-1

-0.2

1.2

100

10k

-6 -5 -4 -3 -2 -1

(V)

(Ω)

BATT

LOAD

BATT

INPUT CURRENT AND OUTPUT VOLTAGE

vs. BATTERY VOLTAGE (SHUTDOWN, LOADED)

INPUT CURRENT AND OUTPUT VOLTAGE

vs. BATTERY VOLTAGE (ON, NO LOAD)

vs. BATTERY VOLTAGE (ON, LOADED)

MAX1832/35 toc07

MAX1832/35 toc08

MAX1832/35 toc09

300

140

120

100

4.0

3.5

3.0

400

350

4.0

3.5

3.0

2.5

2.0

1.5

1.0

0.5

= 0

= 22Ω

= ∞

SHDN

LOAD

= 22Ω

LOAD

OUT

250

200

150

100

MAX1833

300

250

200

150

2.5

2.0

1.5

OUT

BATT

1.0

0.5

100

BATT

-20

-0.5

-1

-0.5

-50

-40

-50

-6 -5 -4 -3 -2 -1

(V)

-6 -5 -4 -3 -2 -1

(V)

BATT

_______________________________________________________________________________________

High-Efficiency Step-Up Converters with

Reverse Battery Protection in a SOT23-6

Typical Operating Characteristics (continued)

= +3.3V, V

= +2V, unless otherwise noted.) (Figure 1)

OUT

BATT

ON/OFF RESPONSE

LOAD TRANSIENT

MAX1832/35 toc10

MAX1832/35 toc11

BATT

OUT

1V/div

100mV/div

OUT

LOAD

1V/div

100mA/div

2ms/div

40µs/div

= V

= 2.0V, R

= 22Ω,

= 22Ω TO 200Ω,

SHDN

BATT

LOAD

= 3.3V

= +3.3V, V

= +2.0V

OUT

BATT

SHUTDOWN RESPONSE

LINE TRANSIENT

MAX1832/35 toc13

MAX1832/35 toc12

SHDN

BATT

1V/div

500mV/div

OUT

1V/div

OUT

50mV/div

MAX1833

40µs/div

= +3.3V,

= 22Ω, V

= 3.3V, V

= 2.0V

BATT

= 100mA, V

LOAD

BATT

OUT

= +2.0V TO +2.5V

BATT

SWITCHING WAVEFORMS

MAX1832/35 toc14

500mA/div

OUT

100mV/div

2V/div

10µs/div

= +3.3V, V

= 40mA, V

= +2.0V

OUT

BATT

_______________________________________________________________________________________

High-Efficiency Step-Up Converters with

Reverse Battery Protection

Pin Description

NAME

FUNCTION

MAX1832

MAX1834

MAX1833

MAX1835

Shutdown. A high logic level turns on the device. When SHD N is low the part is off,

and the current into BATT is typically 0.1µA. For the MAX1832/MAX1833, the

battery is connected to OUT through an internal PFET and the external inductor

when SHD N is low. SHD N can be used for low-battery cutoff (1.228V threshold).

See Low-Battery Cutoff. SHD N has reverse battery protection.

SHDN

BATT

GND

Battery Voltage Connection. BATT has reverse battery protection.

Ground

Inductor Connection. N-channel MOSFET switch drain and synchronous

rectifier P-channel switch drain. LX has reverse battery protection.

OUT

Output Voltage. Bootstrapped supply for the device. Output sense point for

MAX1833/MAX1835.

MAX1832/MAX1834 Feedback Input. Set the output voltage through a

resistor-divider network. See Setting the Output Voltage.

—

MAX1833/MAX1835 Power-On Reset Open-Drain Output. RST pulls low when

the output is 10% below the regulation point. If not used, connect to GND.

—

RST

RST is high impedance in shutdown.

+1.5V TO +3.3V

BATTERY

+1.5V TO +5.0V

BATTERY

10µF

10µH

10µF

10µH

BATT

OUTPUT

+3.3V

BATT

OUTPUT

+5.0V

OUT

RST

OUT

10µF

220kΩ

100kΩ

220kΩ

309kΩ

MAX1833

MAX1835

MAX1832

MAX1834

POWER-ON

RESET

SHDN

10nF

1MΩ

10nF

100kΩ

1MΩ

GND

Figure 1b. MAX1832/MAX1834 Typical Operating Circuit

Figure 1a. MAX1833/MAX1835 Typical Operating Circuit

_______________________________________________________________________________________

High-Efficiency Step-Up Converters with

Reverse Battery Protection

protecting the device and load (Figures 2 and 3).

Detailed Description

Previously, this level of protection required additional

The MAX1832–MAX1835 compact, high-efficiency

circuitry and reduced efficiency due to added compo-

nents in the battery current path.

step-up converters feature 4µA quiescent supply cur-

rent to ensure the highest possible efficiency over a

wide load range. With a minimum +1.5V input voltage,

these devices are well suited for applications with two

alkaline cells, two nickel-metal-hydride (NiMH) cells, or

one lithium ion (Li+) cell. For the MAX1832 and

MAX1833, the battery is connected to OUT through the

inductor and an internal PFET when SHDN is low. This

allows the input battery to be used as a backup or real-

time clock supply when the converter is off by eliminat-

ing the voltage drop across the PFET body diode.

Applications Information

Shutdown

When SHDN is low, the device is off and no current is

drawn from the battery. When SHDN is high, the device

is on. If SHDN is driven from a logic-level output, the

logic high (on) level should be referenced to V_OUTto

avoid intermittent turn on. If SHDN is not used at all,

connect it to OUT. With SHDN connected to OUT, the

MAX1834/MAX1835 startup voltage (1.65V) is slightly

higher, due to the voltage across the PFET body diode.

The SHDN pin has reverse battery protection.

The MAX1832–MAX1835 are ideal for low-power appli-

cations where ultra-small size is critical. These devices

feature built-in synchronous rectification that signifi-

cantly improves efficiency and reduces size and cost

by eliminating the need for an external Schottky diode.

Furthermore, these devices are the industry’s first boost

regulators to offer complete reverse battery protection.

This proprietary design protects the battery, IC, and the

circuitry powered by the IC in the event the input bat-

teries are connected backwards.

In shutdown, the MAX1832/MAX1833 connect the bat-

tery input to the output through the inductor and the

internal synchronous rectifier PFET. This allows the input

battery (rather than a separate backup battery) to pro-

vide backup power for devices such as an idled micro-

controller, SRAM, or real-time clock, without the usual

diode forward drop. If the output has a residual voltage

during shutdown, a small amount of energy will be

transfered from the output back to the input immediately

after shutdown. This energy transfer may cause a slight

momemntary “bump” in the input voltage. The magni-

tude and duration of the input bump are related to the

ratio of C_INand C_OUTand the ability of the input to sink

current. With battery input sources, the bump will be

negligible, but with power-supply inputs (that typically

cannot sink current), the bump may be 100s of mV.

Control Scheme

A current-limited control scheme is a key feature of the

MAX1832–MAX1835. This scheme provides ultra-low

quiescent current and high efficiency over a wide out-

put current range. There is no oscillator. The inductor

current is limited by the 0.5A N-channel current limit or

by the 5µs switch maximum on-time. Following each

on-cycle, the inductor current must ramp to zero before

another cycle may start. When the error comparator

senses that the output has fallen below the regulation

threshold, another cycle begins.

In shutdown, the MAX1834/MAX1835 do not turn on the

internal PFET and thus do not have an output-to-input

current path in shutdown. This allows a separate back-

up battery, such as a Li+ cell, to be diode-connected at

the output, without leakage current flowing to the input.

The MAX1834/MAX1835 still have the typical input-to-

output current path from the battery to the output,

through the PFET body diode, in shutdown.

An internal synchronous rectifier eliminates the need for

an external Schottky diode reducing cost and board

space. While the inductor discharges, the P-channel

MOSFET turns on and shunts the MOSFET body diode.

As a result, the rectifier voltage drop is significantly

reduced, improving efficiency without adding external

components.

Low-Battery Cutoff

The SHDN trip threshold of the MAX1832–MAX1835

can be used as a voltage detector, with a resistor-

divider, to power down the IC when the battery voltage

falls to a set level (Figure 1). The SHDN trip threshold is

1.228V. To use a resistor-divider to set the shutdown

voltage, select a value for R3 in the 100kΩ to 1MΩ

range to minimize battery drain. Calcuate R4 as follows:

Reverse Battery Protection

The MAX1832–MAX1835 have a unique proprietary

design that protects the battery, IC, and circuitry pow-

ered by the IC in the event that the input batteries are

connected backwards. When the batteries are connect-

ed correctly, the reverse battery protection N-channel

MOSFET is on and the device operates normally.

When the batteries are connected backwards, the

reverse battery protection N-channel MOSFET opens,

R4 = R3 (V

/ V

- 1)

SHDN

OFF

is the battery voltage at which the part will shut

OFF

down and V

= 1.228V. Note that input ripple can

SHDN

_______________________________________________________________________________________

High-Efficiency Step-Up Converters with

Reverse Battery Protection

OUT

ZERO-

CROSSING

DETECTOR

MAX1832

MAX1834

STARTUP

CIRCUITRY

SHDN

CONTROL

LOGIC

DRIVER

ERROR

COMPARATOR

BATT

REVERSE BATTERY

PROTECTION MOSFET

CURRENT

LIMIT

1.228V

GND

Figure 2. MAX1832/MAX1834 Simplified Functional Diagram

OUT

ZERO-

CROSSING

DETECTOR

MAX1833

MAX1835

STARTUP

CIRCUITRY

CONTROL

LOGIC

DRIVER

ERROR

COMPARATOR

1.228V

BATT

REVERSE BATTERY

PROTECTION MOSFET

RST

CURRENT

LIMIT

RESET

GND

1.1V

SHDN

Figure 3. MAX1833/MAX1835 Simplified Functional Diagram

_______________________________________________________________________________________

High-Efficiency Step-Up Converters with

Reverse Battery Protection

sometimes cause false shutdowns. To minimize the effect

Table 1. Suggested Inductors and

Suppliers

of ripple, connect a low-value capacitor (C1) from SHDN

to GND to filter out input noise. Select a C1 value such

that the R4 C1 time constant is above 2ms.

MANUFACTURER

INDUCTOR

PHONE

Power-On Reset

The MAX1833/MAX1835 provide a power-on reset out-

put (RST). A 100kΩ to 1MΩ pullup resistor from RST to

OUT provides a logic control signal. This open-drain

output pulls low when the output is 10% below its regu-

lation point. If not used, connect it to GND. RST is high

impedance in shutdown.

DS1608C-103

DO1606T-103

Coilcraft

847-639-6400

CDRH4D18-100

CR43-100

Sumida

Murata

847-956-0666

814-237-1431

LQH4N100K

Setting the Output Voltage

The output voltage of the MAX1832/MAX1834 is

adjustable from +2V to +5.5V, using external resistors

R1 and R2 (Figure 1b). Since FB leakage is 20nA

(max), select feedback resistor R1 to be 100kΩ to

1MΩ. Calculate R2 as follows:

Table 2. Suggested Surface-Mount

Capacitors and Manufacturers

VALUE

(µF)

MANU-

FACTURER

DESCRIPTION

PHONE

594/595 D-

series tantalum

⎛

⎞

OUT

Sprague

AVX

603-224-1961

803-946-0690

847-390-4373

408-573-4150

R2 = R1

−1

⎜

⎟

4.7 to

⎝

⎠

TAJ, TPS-

series tantalum

where V = 1.228V.

Inductor Selection

4.7 to

X7R ceramic

TDK

The control scheme of the MAX1832–MAX1835 permits

flexibility in choosing an inductor. A 10µH inductor per-

forms well for most applications, but values from 4.7µH to

100µH may also be used. Small inductance values typi-

cally offer smaller physical size. Large inductance values

minimize output ripple but reduce output power. Output

power is reduced when the inductance is large enough to

prevent the maximum current limit (525mA) from being

reached before the maximum on-time (5µs) expires.

4.7 to

Taiyo Yuden

capacitor is a good starting value. The input capacitor

reduces the peak current drawn from the battery and

can be the same value as the output capacitor. A larger

input capacitor can be used to further reduce ripple and

improve efficiency.

For maximum output current, choose L such that:

1µs

5µs

(

)

(

)

PC Board Layout and Grounding

Careful printed circuit layout is important for minimizing

ground bounce and noise. Keep the IC’s GND pin and

the ground leads of the input and output filter capaci-

tors less than 0.2in (5mm) apart. In addition, keep all

connections to the FB and LX pins as short as possible.

In particular, when using external feedback resistors,

locate them as close to FB as possible. To maximize

output power and efficiency and minimize output ripple

voltage, use a ground plane and solder the IC’s GND

directly to the ground plane.

BATT(MAX)

BATT(MIN)

< L <

0.525A

−

(

)

BATT(MIN)

NCH IND

0.525A

OUT(MAX) =

OUT

where R

is the R

is the inductor series resistance, and R

NCH

IND

DS(ON)

of the N-channel MOSFET (0.4Ω typ).

Capacitor Selection

Choose an output capacitor to achieve the desired out-

put ripple percentage.

Chip Information

TRANSISTOR COUNT: 953

0.5 × L × 0.525A

OUT

PROCESS: BiCMOS

r% × V

OUT

where r is the desired output ripple in %. A 10µF ceramic

_______________________________________________________________________________________

High-Efficiency Step-Up Converters with

Reverse Battery Protection

Package Information

(The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information

go to www.maxim-ic.com/packages.)

PACKAGE OUTLINE, SOT 6L BODY

21-0058

10 ______________________________________________________________________________________

High-Efficiency Step-Up Converters with

Reverse Battery Protection

Package Information (continued)

(The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information

go to www.maxim-ic.com/packages.)

PIN 1 ID

0.35x0.35

[(N/2)-1] x e

REF.

PIN 1

INDEX

AREA

DETAIL A

PACKAGE OUTLINE, 6,8,10 & 14L,

TDFN, EXPOSED PAD, 3x3x0.80 mm

-DRAWING NOT TO SCALE-

21-0137

______________________________________________________________________________________ 11

High-Efficiency Step-Up Converters with

Reverse Battery Protection

Package Information (continued)

(The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information

go to www.maxim-ic.com/packages.)

COMMON DIMENSIONS

SYMBOL

MIN.

0.70

2.90

0.00

0.20

MAX.

0.80

3.10

0.05

0.40

0.25 MIN.

0.20 REF.

PACKAGE VARIATIONS

DOWNBONDS

ALLOWED

PKG. CODE

T633-1

JEDEC SPEC

MO229 / WEEA

MO229 / WEEC

[(N/2)-1] x e

1.90 REF

1.95 REF

2.00 REF

2.40 REF

1.50±0.10 2.30±0.10 0.95 BSC

1.50±0.10 2.30±0.10 0.65 BSC

0.40±0.05

0.30±0.05

T633-2

T833-1

T833-2

T833-3

YES

T1033-1

T1433-1

T1433-2

1.50±0.10 2.30±0.10 0.50 BSC MO229 / WEED-3 0.25±0.05

1.70±0.10 2.30±0.10 0.40 BSC

- - - -

0.20±0.05

YES

PACKAGE OUTLINE, 6,8,10 & 14L,

TDFN, EXPOSED PAD, 3x3x0.80 mm

-DRAWING NOT TO SCALE-

21-0137

Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are

implied. Maxim reserves the right to change the circuitry and specifications without notice at any time.

12 ____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600

Printed USA

is a registered trademark of Maxim Integrated Products, Inc.

ENG LIS H • ? ? ? ? • ? ? ? • ? ? ?

WH AT' S N EW

PRO DU CT S

S OL UT IO NS

D ESIGN

A PPNOTES

SU PPORT

B U Y

CO MPA N Y

M EMB ERS

M a x i m > P r o d u c t s > P o w e r a n d B a t t e r y M a n a g e m e n t

M A X 1 8 3 2 , M A X 1 8 3 3 , M A X 1 8 3 4 , M A X 1 8 3 5

Q u i c k V i e w

T e c h n i c a l D o c u m e n t s

M o r e I n f o r m a t i o n

A l l

O r d e r i n g I n f o r m a t i o n

N o t e s :

1 . O t h e r o p t i o n s a n d l i n k s f o r p u r c h a s i n g p a r t s a r e l i s t e d a t : h t t p : / / w w w . m a x i m - i c . c o m / s a l e s .

2 . D i d n ' t F i n d W h a t Y o u N e e d ? A s k o u r a p p l i c a t i o n s e n g i n e e r s . E x p e r t a s s i s t a n c e i n f i n d i n g p a r t s , u s u a l l y w i t h i n o n e

b u s i n e s s d a y .

3 . P a r t n u m b e r s u f f i x e s : T o r T & R = t a p e a n d r e e l ; + = R o H S / l e a d - f r e e ; # = R o H S / l e a d - e x e m p t . M o r e : S e e F u l l D a t a

S h e e t o r P a r t N a m i n g C o n v e n t i o n s .

4 . * S o m e p a c k a g e s h a v e v a r i a t i o n s , l i s t e d o n t h e d r a w i n g . " P k g C o d e / V a r i a t i o n " t e l l s w h i c h v a r i a t i o n t h e p r o d u c t u s e s .

D e v i c e s : 1 - 1 6 o f 1 6

M A X 1 8 3 2

F r e e

B uy

T e m p

R o H S/ L e a d - F r e e ?

M a t e r i a l s A n a l y s i s

P a c k a g e : TY PE PI NS F O OTPRI NT

Sa m p l e

D RA WI NG C OD E/ VA R *

M A X 1 8 3 2 E U T # G 1 6

S O T - 2 3 ; 6 p i n ; 9 m m

D w g : 2 1 - 0 0 5 8 I ( P D F )

- 4 0 C t o + 8 5 C R o H S / L e a d - F r e e : R o H S Q u a l i f i e d

M a t e r i a l s A n a l y s i s

U s e p k g c o d e / v a r i a t i o n : U 6 F H - 6 *

M A X 1 8 3 2 E U T # T G 1 6

M A X 1 8 3 2 E U T

S O T - 2 3 ; 6 p i n ; 9 m m

D w g : 2 1 - 0 0 5 8 I ( P D F )

U s e p k g c o d e / v a r i a t i o n : U 6 F H - 6 *

- 4 0 C t o + 8 5 C R o H S / L e a d - F r e e : R o H S Q u a l i f i e d

M a t e r i a l s A n a l y s i s

S O T - 2 3 ; 6 p i n ; 9 m m

D w g : 2 1 - 0 0 5 8 I ( P D F )

- 4 0 C t o + 8 5 C R o H S / L e a d - F r e e : N o

M a t e r i a l s A n a l y s i s

U s e p k g c o d e / v a r i a t i o n : U 6 F - 6 *

M A X 1 8 3 2 E U T - T

S O T - 2 3 ; 6 p i n ; 9 m m

D w g : 2 1 - 0 0 5 8 I ( P D F )

- 4 0 C t o + 8 5 C R o H S / L e a d - F r e e : N o

M a t e r i a l s A n a l y s i s

U s e p k g c o d e / v a r i a t i o n : U 6 F - 6 *

M A X 1 8 3 3

F r e e

B uy

T e m p

R o H S/ L e a d - F r e e ?

M a t e r i a l s A n a l y s i s

P a c k a g e : TY PE PI NS F O OTPRI NT

Sa m p l e

D RA WI NG C OD E/ VA R *

M A X 1 8 3 3 E U T # T G 1 6

S O T - 2 3 ; 6 p i n ; 9 m m

D w g : 2 1 - 0 0 5 8 I ( P D F )

- 4 0 C t o + 8 5 C R o H S / L e a d - F r e e : R o H S Q u a l i f i e d

M a t e r i a l s A n a l y s i s

U s e p k g c o d e / v a r i a t i o n : U 6 F H - 6 *

M A X 1 8 3 3 E U T # G 1 6

M A X 1 8 3 3 E U T

S O T - 2 3 ; 6 p i n ; 9 m m

D w g : 2 1 - 0 0 5 8 I ( P D F )

U s e p k g c o d e / v a r i a t i o n : U 6 F H - 6 *

- 4 0 C t o + 8 5 C R o H S / L e a d - F r e e : R o H S Q u a l i f i e d

M a t e r i a l s A n a l y s i s

S O T - 2 3 ; 6 p i n ; 9 m m

D w g : 2 1 - 0 0 5 8 I ( P D F )

- 4 0 C t o + 8 5 C R o H S / L e a d - F r e e : N o

M a t e r i a l s A n a l y s i s

U s e p k g c o d e / v a r i a t i o n : U 6 F - 6 *

M A X 1 8 3 3 E U T - T

M A X 1 8 3 3 E T T 3 0

M A X 1 8 3 3 E T T 3 0 - T

S O T - 2 3 ; 6 p i n ; 9 m m

D w g : 2 1 - 0 0 5 8 I ( P D F )

U s e p k g c o d e / v a r i a t i o n : U 6 F - 6 *

- 4 0 C t o + 8 5 C R o H S / L e a d - F r e e : N o

M a t e r i a l s A n a l y s i s

T H I N Q F N ( D u a l ) ; 6 p i n ; 1 0 m m

D w g : 2 1 - 0 1 3 7 I ( P D F )

U s e p k g c o d e / v a r i a t i o n : T 6 3 3 - 2 *

- 4 0 C t o + 8 5 C R o H S / L e a d - F r e e : N o

M a t e r i a l s A n a l y s i s

T H I N Q F N ( D u a l ) ; 6 p i n ; 1 0 m m

D w g : 2 1 - 0 1 3 7 I ( P D F )

- 4 0 C t o + 8 5 C R o H S / L e a d - F r e e : N o

M a t e r i a l s A n a l y s i s

U s e p k g c o d e / v a r i a t i o n : T 6 3 3 - 2 *

M A X 1 8 3 4

F r e e

R o H S/ L e a d - F r e e ?

M a t e r i a l s A n a l y s i s

S O T - 2 3 ; 6 p i n ; 9 m m

D w g : 2 1 - 0 0 5 8 I ( P D F )

- 4 0 C t o + 8 5 C R o H S / L e a d - F r e e : R o H S Q u a l i f i e d

M a t e r i a l s A n a l y s i s

M A X 1 8 3 4 E U T # T G 1 6

M A X 1 8 3 4 E U T

S O T - 2 3 ; 6 p i n ; 9 m m

D w g : 2 1 - 0 0 5 8 I ( P D F )

U s e p k g c o d e / v a r i a t i o n : U 6 F H - 6 *

- 4 0 C t o + 8 5 C R o H S / L e a d - F r e e : R o H S Q u a l i f i e d

M a t e r i a l s A n a l y s i s

S O T - 2 3 ; 6 p i n ; 9 m m

D w g : 2 1 - 0 0 5 8 I ( P D F )

- 4 0 C t o + 8 5 C R o H S / L e a d - F r e e : N o

M a t e r i a l s A n a l y s i s

U s e p k g c o d e / v a r i a t i o n : U 6 F - 6 *

M A X 1 8 3 4 E U T - T

S O T - 2 3 ; 6 p i n ; 9 m m

D w g : 2 1 - 0 0 5 8 I ( P D F )

- 4 0 C t o + 8 5 C R o H S / L e a d - F r e e : N o

M a t e r i a l s A n a l y s i s

U s e p k g c o d e / v a r i a t i o n : U 6 F - 6 *

M A X 1 8 3 5

F r e e

B uy

T e m p

R o H S/ L e a d - F r e e ?

M a t e r i a l s A n a l y s i s

P a c k a g e : TY PE PI NS F O OTPRI NT

Sa m p l e

D RA WI NG C OD E/ VA R *

M A X 1 8 3 5 E U T

S O T - 2 3 ; 6 p i n ; 9 m m

D w g : 2 1 - 0 0 5 8 I ( P D F )

- 4 0 C t o + 8 5 C R o H S / L e a d - F r e e : N o

M a t e r i a l s A n a l y s i s

U s e p k g c o d e / v a r i a t i o n : U 6 F - 6 *

M A X 1 8 3 5 E U T - T

S O T - 2 3 ; 6 p i n ; 9 m m

D w g : 2 1 - 0 0 5 8 I ( P D F )

- 4 0 C t o + 8 5 C R o H S / L e a d - F r e e : N o

M a t e r i a l s A n a l y s i s

U s e p k g c o d e / v a r i a t i o n : U 6 F - 6 *

D i d n ' t F i n d W h a t Y o u N e e d ?

N e x t D a y P r o d u c t S e l e c t i o n A s s i s t a n c e f r o m A p p l i c a t i o n s E n g i n e e r s

P a r a m e t r i c S e a r c h

A p p l i c a t i o n s H e l p

Q u i c k V i e w

T e c h n i c a l D o c u m e n t s

O r d e r i n g I n f o

M o r e I n f o r m a t i o n

D e s c r i p t i o n

D a t a S h e e t

A p p l i c a t i o n N o t e s

D e s i g n G u i d e s

E n g i n e e r i n g J o u r n a l s

R e l i a b i l i t y R e p o r t s

S o f t w a r e / M o d e l s

E v a l u a t i o n K i t s

P r i c e a n d A v a i l a b i l i t y

S a m p l e s

B u y O n l i n e

P a c k a g e I n f o r m a t i o n

L e a d - F r e e I n f o r m a t i o n

R e l a t e d P r o d u c t s

N o t e s a n d C o m m e n t s

E v a l u a t i o n K i t s

K e y F e a t u r e s

A p p l i c a t i o n s / U s e s

K e y S p e c i f i c a t i o n s

D i a g r a m

D o c u m e n t R e f . : 1 9 - 1 8 0 2 ; R e v 2 ; 2 0 0 5 - 0 7 - 0 4

T h i s p a g e l a s t m o d i f i e d : 2 0 0 7 - 0 6 - 1 4

C O N T A C T U S : S E N D U S A N E M A I L

C o p y r i g h t 2 0 0 7 b y M a x i m I n t e g r a t e d P r o d u c t s , D a l l a s S e m i c o n d u c t o r • L e g a l N o t i c e s • P r i v a c y P o l i c y

MAX1835EUT-T [ROCHESTER]

相关型号：

MAX1835EVKIT

MAX1836

MAX1836-MAX1837

MAX1836ETT33+T

MAX1836ETT50-T

MAX1836EUT33

MAX1836EUT33#G16

MAX1836EUT33#TG16

MAX1836EUT33-T

MAX1836EUT50

MAX1836EUT50#G16

MAX1836EUT50#TG16