米6体育平台手机版

ZHCSHR1A September 2017 – February 2018 TPS7A54-Q1

PRODUCTION DATA.

6.3 Recommended Operating Conditions

over junction temperature range (unless otherwise noted)

		MIN	NOM	MAX	UNIT
V_IN	Input supply voltage range	1.1		6.5	V
V_BIAS	Bias supply voltage range⁽¹⁾	3.0		6.5	V
V_EN	Enable voltage range	0		6.5	V
I_OUT	Output current	0		4	A
C_IN	Input capacitor	10	47		µF
C_OUT	Output capacitor⁽²⁾	47	47 \|\| 10 \|\| 10⁽³⁾		µF
C_BIAS	Bias capacitor ⁽³⁾	10			µF
R_PG	Power-good pullup resistance	10		100	kΩ
C_NR/SS	NR/SS capacitor		10		nF
C_FF	Feed-forward capacitor		10		nF
R₁	Top resistor value in feedback network for adjustable operation⁽⁴⁾		12.1⁽⁴⁾		kΩ
R₂	Bottom resistor value in feedback network for adjustable operation⁽⁵⁾		160		kΩ
T_J	Operating junction temperature	–40		150	°C

(1) BIAS supply is required when the V_IN supply is below 1.4 V. Conversely, no BIAS supply is required when the V_IN supply is higher than or equal to 1.4 V. A BIAS supply helps improve dc and ac performance for V_IN ≤ 2.2 V.

(2) The recommended output capacitors are selected to optimize PSRR for the frequency range of 400 kHz to 700 kHz. This frequency range is a typical value for dc-dc supplies.

(3) If BIAS is used, a 10-µF capacitor is required. If BIAS is not used, a capacitor on the BIAS pin is not needed.

(4) The 12.1-kΩ resistor is selected to optimize PSRR and noise by matching the internal R₁ value.

(5) The upper limit for the R₂ resistor is to ensure accuracy by making the current through the feedback network much larger than the leakage current into the feedback node.