米6体育平台手机版

ZHCSJO3B May 2019 – November 2020 LMR34215-Q1

PRODUCTION DATA

封装选项

机械数据 (封装 | 引脚)

RNX|12
- MPQF465A

散热焊盘机械数据 (封装 | 引脚)

RNX|12
- QFND597B

订购信息

7.7 System Characteristics

The following specifications apply to a typical application circuit with nominal component values. Specifications in the typical (TYP) column apply to T_J = 25℃ only. Specifications in the minimum (MIN) and maximum (MAX) columns apply to the case of typical components over the temperature range of T_J = –40℃ to 150℃. These specifications are not ensured by production testing.

PARAMETER		TEST CONDITIONS	MIN	TYP	MAX	UNIT
V_IN	Operating input voltage range		4.2		42	V
V_OUT	Adjustable output voltage regulation⁽¹⁾	FPWM operation	–1.5%		1.5%
D_MAX	Maximum switch duty cycle⁽²⁾			98%
V_HC	FB pin voltage required to trip short-circuit hiccup mode			0.4		V
t_HC	Time between current-limit hiccup burst			94		ms
t_D	Switch voltage dead time			2		ns
F_sSS	Frequency span of spread spectrum operation			±4		%
F_rSS	Triangular spread spectrum repetition frequency			16		kHz
T_SD	Thermal shutdown temperature	Shutdown temperature		170		°C
T_SD	Thermal shutdown temperature	Recovery temperature		158		°C

(1) Deviation in V_OUT from nominal output voltage value at V_IN = 24 V, I_OUT = 0 A to 1.5 A

(2) In dropout the switching frequency drops to increase the effective duty cycle. The lowest frequency is clamped at approximately: F_MIN = 1 / (t_ON-MAX + t_OFF-MIN). D_MAX = t_ON-MAX /(t_ON-MAX + t_OFF-MIN).