MAX1715EEI(2000) データシートの表示（PDF） - Maxim Integrated

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MAX1715EEI
(Rev.:2000)

Ultra-High Efficiency, Dual Step-Down Controller for Notebook Computers

Maxim Integrated 

Ultra-High Efficiency, Dual Step-Down

Controller for Notebook Computers

Pin Description (continued)

PIN NAME

FUNCTION

External Inductor Connection for OUT2. Connect to the switched side of the inductor. LX2 serves as the

16

LX2

lower supply voltage rail for the DH2 high-side gate driver and is the positive input to the OUT2 current-limit

comparator.

17

DH2 High-Side Gate Driver Output for OUT2. Swings from LX2 to BST2.

18

BST2

Boost Flying Capacitor Connection for OUT2. Connect to an external capacitor and diode according to the

Standard Application Circuit (Figure 1). See MOSFET Gate Drivers (DH_, DL_) section.

19

DL2

Low-Side Gate-Driver Output for OUT2. DL2 swings from PGND to VDD.

20

VDD

Supply Input for the DL Gate Drivers. Connect to the system supply voltage, +4.5V to +5.5V. Bypass to

PGND with a minimum 4.7µF ceramic capacitor.

21

VCC

Analog-Supply Input. Connect to the system supply voltage, +4.5V to +5.5V, with a 20Ω series resistor.

Bypass to AGND with a 1µF ceramic capacitor.

22

PGND

Power Ground. Connect directly to the low-side MOSFETs’ sources. Serves as the negative input of the cur-

rent-sense amplifiers.

24

DL1

Low-Side Gate Driver Output for OUT1. DL1 swings PGND to VDD.

25

BST1

Boost Flying Capacitor Connection for OUT1. Connect to an external capacitor and diode according to the

Standard Application Circuit (Figure 1). See MOSFET Gate Drivers (DH_, DL_) section.

26

DH1 High-Side Gate Driver Output for OUT1. Swings from LX1 to BST1.

27

LX1

External Inductor Connection for OUT1. Connect to the switched side of the inductor. LX1 serves as the

lower supply voltage rail for the DH1 high-side gate driver.

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