Linear Technology DC1973A Demo Manual page 2

Usb 5v 2.5a output, 42v input synchronous buck with cable drop compensation
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DEMO MANUAL DC1973A
Description
Table 1. Configure X1 – X4 for Different USB Applications
X1
Do Not Care
OPEN
D+
2
Arrow.com.
Arrow.com.
Downloaded from
Downloaded from
Figure 1. LT8697 Demo Circuit EMI Performance, Switching Frequency = 2MHz
X2
Do Not Care
OPEN
D-
X3
Do Not Care
OPEN
SHORT
OPEN
X4
J3
Not in USE
SET
USB - DCP
SET
USB - APPLE 2.1A
dc1973af

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Lt8697

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