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參數(shù)資料
| 型號： | MAX4919BETD+T |
| 廠商： | Maxim Integrated Products |
| 文件頁數(shù)： | 1/19頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC CTLR OVP/OCP BATT PWR 14-TDFN |
| 產(chǎn)品培訓模塊： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 標準包裝： | 2,500 |
| 類型： | 過壓和過流控制器 |
| 應用： | 手機，數(shù)碼相機，媒體播放器 |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 14-WFDFN 裸露焊盤 |
| 供應商設備封裝： | 14-TDFN-EP（3x3） |
| 包裝： | 帶卷 (TR) |
General Description
The MAX4919B/MAX4920B/MAX4921B overvoltage
protection controllers protect low-voltage systems
against high-voltage faults up to +28V. An internal 1.8A
(min) pFET with low RON (100m
) switches a battery to
the load and also protects the battery against short-cir-
cuit faults. When a short circuit occurs, the current
through the internal pFET is limited for a blanking peri-
od. If the short condition is present after the blanking
period, the switch is latched off and remains off until
one of the input signals (IN, HP_PWR, PWR_ON) is
cycled. The pFET is turned on by a logic-high voltage
at PWR_HOLD, HP_PWR, PWR_ON, or IN .
The overvoltage thresholds (OVLO) are preset to
+6.38V (MAX4919B), +5.80V (MAX4920B), and +4.65V
(MAX4921B). When the input voltage drops below the
undervoltage lockout (UVLO) threshold, the devices enter
a low-current standby mode. In shutdown mode, the
current is reduced to 0.4A. The MAX4919B/MAX4920B
have a +4.27V UVLO threshold, and the MAX4921B has
a +2.35V UVLO threshold.
The MAX4919B/MAX4920B/MAX4921B are offered in a
small 14-pin TDFN package (3mm x 3mm) with an
exposed paddle and are specified over the extended
-40°C to +85°C temperature range.
Applications
Cell Phones
Digital Still Cameras
PDAs and Palmtop Devices
MP3 Players
Features
o Input Overvoltage Protection Up to +28V
o Preset Overvoltage Protection Trip Level
6.38V (MAX4919B)
5.80V (MAX4920B)
4.65V (MAX4921B)
o Adapter/Car-Kit Auto-Selector
o Low-Current Undervoltage Lockout Mode
o Internal 1.8A (min) Battery Switchover FET
o Integrated Low-Battery Detect
o Battery Short-Circuit Protection
o Low-Cost External nMOS Overvoltage FET
o 14-Pin TDFN Package (3mm x 3mm)
MAX4919B/MAX4920B/MAX4921B
Battery Power-Up Logic with Overvoltage
and Overcurrent Protection
________________________________________________________________ Maxim Integrated Products
1
19-0614; Rev 0; 8/06
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.
MAX4919B
MAX4920B
MAX4921B
TDFN (3mm x 3mm)
TOP VIEW
24
5
13
11
10
ACOK
BTO
IN
BTI
1
14
EN
GP1
3
12
PWR_HOLD
GN1
6
9
ONOK
HP_PWR
7
8
GND
PWR_ON
*EP
*EXPOSED PADDLE
+DENOTES LEAD-FREE PACKAGE
+
Pin Configuration
Ordering Information/Selector Guide
PART
PIN-
PACKAGE
OVLO (V)
UVLO (V)
TOP MARK
PKG CODE
MAX4919BETD+T
14 TDFN-EP*
6.38
4.27
ABY
T1433-2
MAX4920BETD+T
14 TDFN-EP*
5.80
4.27
ABZ
T1433-2
MAX4921BETD+T
14 TDFN-EP*
4.65
2.35
ACA
T1433-2
Note: All devices are specified over the -40°C to +85°C operating temperature range.
+Denotes lead-free package.
*EP = Exposed paddle.
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