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參數(shù)資料
| 型號(hào)： | MAX1540A |
| 廠商： | Maxim Integrated Products, Inc. |
| 英文描述： | Dual Step-Down Controllers with Saturation Protection, Dynamic Output, and Linear Regulator |
| 中文描述： | 雙路、降壓型控制器，帶有電感飽和保護(hù)、動(dòng)態(tài)輸出和線性穩(wěn)壓器 |
| 文件頁數(shù)： | 18/49頁 |
| 文件大?。?/td> | 794K |
| 代理商： | MAX1540A |
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M
Dual Step-Down Controllers with Saturation
Protection, Dynamic Output, and Linear Regulator
18
______________________________________________________________________________________
PIN
MAX1540A
MAX1541
NAME
FUNCTION
13
17
PGOOD2
Open-Drain Power-Good Output. PGOOD2 is low when the output voltage is more
than 10% (typ) above or below the normal regulation point, during soft-start, and in
shutdown. After the soft-start circuit has terminated, PGOOD2 becomes high
impedance if the output is in regulation.
14
18
DH2
High-Side Gate-Driver Output for Controller 2. DH2 swings from LX2 to BST2.
15
19
LX2
Inductor Connection for Controller 2. Connect to the switched side of the inductor.
LX2 serves as the lower supply rail for the DH2 high-side gate driver.
16
20
BST2
Boost Flying-Capacitor Connection for Controller 2. Connect to an external capacitor
and diode as shown in Figure 8. An optional resistor in series with BST2 allows the
DH2 pullup current to be adjusted.
17
21
GND
Analog and Power Ground. Connect backside pad to GND.
18
22
DL2
Low-Side Gate-Driver Output for Controller 2. DL2 swings from GND to LDOOUT
(MAX1540A) or GND to V
DD
(MAX1541).
19
23
V+
Battery Voltage Input. The controller uses V+ to set the on-time one-shot timing. The
DH on-time is inversely proportional to input voltage over a range of 2V to 28V. For
the MAX1540A, V+ also serves as the linear-regulator input supply.
—
24
LDOIN
Internal Linear-Regulator Input Supply. Power LDOIN from a 4.5V to 28V voltage
source. Bypass LDOIN to GND with a 4.7μF or greater capacitor. For the MAX1540A,
LDOIN is internally connected to V+. For the MAX1541, LDOIN must be connected to
V
DD
when LDO is not used.
—
25
V
DD
MAX1541 Supply Voltage Input for the DL_ Gate Driver. Connect to the system
supply voltage (+4.5V to +5.5V). Bypass V
DD
to power ground with a 1μF or greater
ceramic capacitor. For the MAX1540A, LDOOUT supplies the DL_ gate drivers
(V
DD
= LDOOUT).
20
26
LDOOUT
Linear Regulator Output. Bypass LDOOUT with a 1μF or greater capacitor per 5mA of
load (internal and external), with a minimum of 4.7μF. For the MAX1540A, LDOOUT
powers the DL_ gate drivers (V
DD
internally connected to LDOOUT).
—
27
FBLDO
Feedback Input for the Linear Regulator. Connect to GND for a fixed 5V output. For
an adjustable output (1.25V to V
LDOIN
- 0.6V), connect FBLDO to a resistive voltage-
divider from LDOOUT to analog ground (GND). The FBLDO regulation voltage is
+1.25V. For the MAX1540A, FBLDO is internally connected to GND for a fixed 5V
output.
21
28
DL1
Low-Side Gate-Driver Output for Controller 1. DL1 swings from GND to LDOOUT
(MAX1540A) or GND to V
DD
(MAX1541).
22
29
LDOON
Linear-Regulator Enable Input. For automatic startup, connect to V+ or LDOIN
(MAX1541). Connect to GND to shut down the linear regulator.
23
30
BST1
Boost Flying-Capacitor Connection for Controller 1. Connect to an external capacitor
and diode as shown in Figure 8. An optional resistor in series with BST1 allows the
DH1 pullup current to be adjusted.
Pin Description (continued)
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MAX1540AETJ+ | 功能描述:DC/DC 開關(guān)控制器 Dual Step-Down Ctlr w/Saturation Prot RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關(guān)頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數(shù)量:1 最大工作溫度:+ 125 C 安裝風(fēng)格: 封裝 / 箱體:CPAK |
| MAX1540AETJ+T | 功能描述:DC/DC 開關(guān)控制器 Dual Step-Down Ctlr w/Saturation Prot RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關(guān)頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數(shù)量:1 最大工作溫度:+ 125 C 安裝風(fēng)格: 封裝 / 箱體:CPAK |
| MAX1540ETJ | 功能描述:DC/DC 開關(guān)控制器 RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關(guān)頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數(shù)量:1 最大工作溫度:+ 125 C 安裝風(fēng)格: 封裝 / 箱體:CPAK |
| MAX1540ETJ+ | 功能描述:DC/DC 開關(guān)控制器 Dual Step-Down Ctlr RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關(guān)頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數(shù)量:1 最大工作溫度:+ 125 C 安裝風(fēng)格: 封裝 / 箱體:CPAK |
| MAX1540ETJ+T | 功能描述:DC/DC 開關(guān)控制器 Dual Step-Down Ctlr RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關(guān)頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數(shù)量:1 最大工作溫度:+ 125 C 安裝風(fēng)格: 封裝 / 箱體:CPAK |
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